| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -passes=loop-vectorize -force-vector-width=2 < %s | FileCheck %s |
| ; RUN: opt -S -passes=loop-vectorize -force-vector-width=2 -prefer-predicate-over-epilogue=predicate-dont-vectorize < %s | FileCheck --check-prefix TAILFOLD %s |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| define void @bottom_tested(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @bottom_tested( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[N_MOD_VF]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[TMP1]] to i64 |
| ; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP2]] |
| ; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i16, ptr [[TMP3]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP4]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 [[TMP0]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[CMP_N]], label [[IF_END:%.*]], label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP3:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret void |
| ; |
| ; TAILFOLD-LABEL: @bottom_tested( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; TAILFOLD-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1 |
| ; TAILFOLD-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; TAILFOLD: vector.ph: |
| ; TAILFOLD-NEXT: [[N_RND_UP:%.*]] = add i32 [[TMP0]], 1 |
| ; TAILFOLD-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[N_RND_UP]], 2 |
| ; TAILFOLD-NEXT: [[N_VEC:%.*]] = sub i32 [[N_RND_UP]], [[N_MOD_VF]] |
| ; TAILFOLD-NEXT: [[TRIP_COUNT_MINUS_1:%.*]] = sub i32 [[TMP0]], 1 |
| ; TAILFOLD-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i32> poison, i32 [[TRIP_COUNT_MINUS_1]], i64 0 |
| ; TAILFOLD-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i32> [[BROADCAST_SPLATINSERT]], <2 x i32> poison, <2 x i32> zeroinitializer |
| ; TAILFOLD-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; TAILFOLD: vector.body: |
| ; TAILFOLD-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE2:%.*]] ] |
| ; TAILFOLD-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_STORE_CONTINUE2]] ] |
| ; TAILFOLD-NEXT: [[TMP1:%.*]] = icmp ule <2 x i32> [[VEC_IND]], [[BROADCAST_SPLAT]] |
| ; TAILFOLD-NEXT: [[TMP2:%.*]] = sext <2 x i32> [[VEC_IND]] to <2 x i64> |
| ; TAILFOLD-NEXT: [[TMP3:%.*]] = extractelement <2 x i1> [[TMP1]], i32 0 |
| ; TAILFOLD-NEXT: br i1 [[TMP3]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]] |
| ; TAILFOLD: pred.store.if: |
| ; TAILFOLD-NEXT: [[TMP4:%.*]] = extractelement <2 x i64> [[TMP2]], i32 0 |
| ; TAILFOLD-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[TMP5]], align 4 |
| ; TAILFOLD-NEXT: br label [[PRED_STORE_CONTINUE]] |
| ; TAILFOLD: pred.store.continue: |
| ; TAILFOLD-NEXT: [[TMP6:%.*]] = extractelement <2 x i1> [[TMP1]], i32 1 |
| ; TAILFOLD-NEXT: br i1 [[TMP6]], label [[PRED_STORE_IF1:%.*]], label [[PRED_STORE_CONTINUE2]] |
| ; TAILFOLD: pred.store.if1: |
| ; TAILFOLD-NEXT: [[TMP7:%.*]] = extractelement <2 x i64> [[TMP2]], i32 1 |
| ; TAILFOLD-NEXT: [[TMP8:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[TMP7]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[TMP8]], align 4 |
| ; TAILFOLD-NEXT: br label [[PRED_STORE_CONTINUE2]] |
| ; TAILFOLD: pred.store.continue2: |
| ; TAILFOLD-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; TAILFOLD-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], splat (i32 2) |
| ; TAILFOLD-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; TAILFOLD-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; TAILFOLD: middle.block: |
| ; TAILFOLD-NEXT: br i1 true, label [[IF_END:%.*]], label [[SCALAR_PH]] |
| ; TAILFOLD: scalar.ph: |
| ; TAILFOLD-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP3:![0-9]+]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret void |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.cond ] |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.cond, label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| define void @early_exit(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @early_exit( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP5:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret void |
| ; |
| ; TAILFOLD-LABEL: @early_exit( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: br label [[FOR_COND]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret void |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| br label %for.cond |
| |
| if.end: |
| ret void |
| } |
| |
| define i32 @early_exit_with_live_out(ptr %ptr) { |
| ; CHECK-LABEL: @early_exit_with_live_out( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr i32, ptr [[PTR:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr i32, ptr [[TMP1]], i32 0 |
| ; CHECK-NEXT: store <2 x i32> splat (i32 10), ptr [[TMP2]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i64 [[INDEX_NEXT]], 998 |
| ; CHECK-NEXT: br i1 [[TMP3]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 998, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[PTR]], i64 [[IV]] |
| ; CHECK-NEXT: [[L:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], 1000 |
| ; CHECK-NEXT: br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; CHECK: loop.latch: |
| ; CHECK-NEXT: store i32 10, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: br label [[LOOP_HEADER]], !llvm.loop [[LOOP7:![0-9]+]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: [[RES_LCSSA:%.*]] = phi i32 [ [[L]], [[LOOP_HEADER]] ] |
| ; CHECK-NEXT: ret i32 [[RES_LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @early_exit_with_live_out( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; TAILFOLD: loop.header: |
| ; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[PTR:%.*]], i64 [[IV]] |
| ; TAILFOLD-NEXT: [[L:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; TAILFOLD-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], 1000 |
| ; TAILFOLD-NEXT: br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; TAILFOLD: loop.latch: |
| ; TAILFOLD-NEXT: store i32 10, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER]] |
| ; TAILFOLD: exit: |
| ; TAILFOLD-NEXT: [[RES_LCSSA:%.*]] = phi i32 [ [[L]], [[LOOP_HEADER]] ] |
| ; TAILFOLD-NEXT: ret i32 [[RES_LCSSA]] |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ] |
| %gep = getelementptr i32, ptr %ptr, i64 %iv |
| %l = load i32, ptr %gep |
| %iv.next = add nuw nsw i64 %iv, 1 |
| %ec = icmp eq i64 %iv.next, 1000 |
| br i1 %ec, label %exit, label %loop.latch |
| |
| loop.latch: |
| store i32 10, ptr %gep |
| br label %loop.header |
| |
| exit: |
| %res.lcssa = phi i32 [ %l, %loop.header ] |
| ret i32 %res.lcssa |
| } |
| |
| ; Same as early_exit, but with optsize to prevent the use of |
| ; a scalar epilogue. -- Can't vectorize this in either case. |
| define void @optsize(ptr %p, i32 %n) optsize { |
| ; CHECK-LABEL: @optsize( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: br label [[FOR_COND]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret void |
| ; |
| ; TAILFOLD-LABEL: @optsize( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: br label [[FOR_COND]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret void |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| br label %for.cond |
| |
| if.end: |
| ret void |
| } |
| |
| |
| ; multiple exit - no values inside the loop used outside |
| define void @multiple_unique_exit(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_unique_exit( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP9:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret void |
| ; |
| ; TAILFOLD-LABEL: @multiple_unique_exit( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret void |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| ; multiple exit - with an lcssa phi |
| define i32 @multiple_unique_exit2(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_unique_exit2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP11:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ], [ [[I]], [[FOR_COND]] ] |
| ; CHECK-NEXT: ret i32 [[I_LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @multiple_unique_exit2( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ], [ [[I]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: ret i32 [[I_LCSSA]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end |
| |
| if.end: |
| ret i32 %i |
| } |
| |
| ; multiple exit w/a non lcssa phi |
| define i32 @multiple_unique_exit3(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_unique_exit3( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP13:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[EXIT:%.*]] = phi i32 [ 0, [[FOR_COND]] ], [ 1, [[FOR_BODY]] ] |
| ; CHECK-NEXT: ret i32 [[EXIT]] |
| ; |
| ; TAILFOLD-LABEL: @multiple_unique_exit3( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: [[EXIT:%.*]] = phi i32 [ 0, [[FOR_COND]] ], [ 1, [[FOR_BODY]] ] |
| ; TAILFOLD-NEXT: ret i32 [[EXIT]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end |
| |
| if.end: |
| %exit = phi i32 [0, %for.cond], [1, %for.body] |
| ret i32 %exit |
| } |
| |
| ; multiple exits w/distinct target blocks |
| define i32 @multiple_exit_blocks(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_exit_blocks( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP15:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret i32 0 |
| ; CHECK: if.end2: |
| ; CHECK-NEXT: ret i32 1 |
| ; |
| ; TAILFOLD-LABEL: @multiple_exit_blocks( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret i32 0 |
| ; TAILFOLD: if.end2: |
| ; TAILFOLD-NEXT: ret i32 1 |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end2 |
| |
| if.end: |
| ret i32 0 |
| |
| if.end2: |
| ret i32 1 |
| } |
| |
| ; LCSSA, common value each exit |
| define i32 @multiple_exit_blocks2(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_exit_blocks2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP16:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP17:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ] |
| ; CHECK-NEXT: ret i32 [[I_LCSSA]] |
| ; CHECK: if.end2: |
| ; CHECK-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: ret i32 [[I_LCSSA1]] |
| ; |
| ; TAILFOLD-LABEL: @multiple_exit_blocks2( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: ret i32 [[I_LCSSA]] |
| ; TAILFOLD: if.end2: |
| ; TAILFOLD-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ] |
| ; TAILFOLD-NEXT: ret i32 [[I_LCSSA1]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end2 |
| |
| if.end: |
| ret i32 %i |
| |
| if.end2: |
| ret i32 %i |
| } |
| |
| ; LCSSA, distinct value each exit |
| define i32 @multiple_exit_blocks3(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_exit_blocks3( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0) |
| ; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096) |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1 |
| ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2 |
| ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]] |
| ; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]] |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0 |
| ; CHECK-NEXT: store <2 x i16> zeroinitializer, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]] |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP19:![0-9]+]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ] |
| ; CHECK-NEXT: ret i32 [[I_LCSSA]] |
| ; CHECK: if.end2: |
| ; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: ret i32 [[INC_LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @multiple_exit_blocks3( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ] |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]] |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096 |
| ; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: ret i32 [[I_LCSSA]] |
| ; TAILFOLD: if.end2: |
| ; TAILFOLD-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ] |
| ; TAILFOLD-NEXT: ret i32 [[INC_LCSSA]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp slt i32 %i, %n |
| br i1 %cmp, label %for.body, label %if.end |
| |
| for.body: |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| %cmp2 = icmp slt i32 %i, 2096 |
| br i1 %cmp2, label %for.cond, label %if.end2 |
| |
| if.end: |
| ret i32 %i |
| |
| if.end2: |
| ret i32 %inc |
| } |
| |
| ; unique exit case but with a switch as two edges between the same pair of |
| ; blocks is an often missed edge case |
| define i32 @multiple_exit_switch(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_exit_switch( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: switch i32 [[I]], label [[FOR_COND]] [ |
| ; CHECK-NEXT: i32 2096, label [[IF_END:%.*]] |
| ; CHECK-NEXT: i32 2097, label [[IF_END]] |
| ; CHECK-NEXT: ] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ], [ [[I]], [[FOR_COND]] ] |
| ; CHECK-NEXT: ret i32 [[I_LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @multiple_exit_switch( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: switch i32 [[I]], label [[FOR_COND]] [ |
| ; TAILFOLD-NEXT: i32 2096, label [[IF_END:%.*]] |
| ; TAILFOLD-NEXT: i32 2097, label [[IF_END]] |
| ; TAILFOLD-NEXT: ] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ], [ [[I]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: ret i32 [[I_LCSSA]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.cond ] |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| switch i32 %i, label %for.cond [ |
| i32 2096, label %if.end |
| i32 2097, label %if.end |
| ] |
| |
| if.end: |
| ret i32 %i |
| } |
| |
| ; multiple exit case but with a switch as multiple exiting edges from |
| ; a single block is a commonly missed edge case |
| define i32 @multiple_exit_switch2(ptr %p, i32 %n) { |
| ; CHECK-LABEL: @multiple_exit_switch2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; CHECK-NEXT: switch i32 [[I]], label [[FOR_COND]] [ |
| ; CHECK-NEXT: i32 2096, label [[IF_END:%.*]] |
| ; CHECK-NEXT: i32 2097, label [[IF_END2:%.*]] |
| ; CHECK-NEXT: ] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: ret i32 0 |
| ; CHECK: if.end2: |
| ; CHECK-NEXT: ret i32 1 |
| ; |
| ; TAILFOLD-LABEL: @multiple_exit_switch2( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_COND:%.*]] |
| ; TAILFOLD: for.cond: |
| ; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ] |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1 |
| ; TAILFOLD-NEXT: switch i32 [[I]], label [[FOR_COND]] [ |
| ; TAILFOLD-NEXT: i32 2096, label [[IF_END:%.*]] |
| ; TAILFOLD-NEXT: i32 2097, label [[IF_END2:%.*]] |
| ; TAILFOLD-NEXT: ] |
| ; TAILFOLD: if.end: |
| ; TAILFOLD-NEXT: ret i32 0 |
| ; TAILFOLD: if.end2: |
| ; TAILFOLD-NEXT: ret i32 1 |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i = phi i32 [ 0, %entry ], [ %inc, %for.cond ] |
| %iprom = sext i32 %i to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %inc = add nsw i32 %i, 1 |
| switch i32 %i, label %for.cond [ |
| i32 2096, label %if.end |
| i32 2097, label %if.end2 |
| ] |
| |
| if.end: |
| ret i32 0 |
| |
| if.end2: |
| ret i32 1 |
| } |
| |
| define i32 @multiple_latch1(ptr %p) { |
| ; CHECK-LABEL: @multiple_latch1( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ] |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I_02]], 1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]] |
| ; CHECK: for.second: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16 |
| ; CHECK-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]] |
| ; CHECK: for.body.backedge: |
| ; CHECK-NEXT: br label [[FOR_BODY]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| ; TAILFOLD-LABEL: @multiple_latch1( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_BODY:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ] |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I_02]], 1 |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16 |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]] |
| ; TAILFOLD: for.second: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16 |
| ; TAILFOLD-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]] |
| ; TAILFOLD: for.body.backedge: |
| ; TAILFOLD-NEXT: br label [[FOR_BODY]] |
| ; TAILFOLD: for.end: |
| ; TAILFOLD-NEXT: ret i32 0 |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: |
| %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body.backedge] |
| %inc = add nsw i32 %i.02, 1 |
| %cmp = icmp slt i32 %inc, 16 |
| br i1 %cmp, label %for.body.backedge, label %for.second |
| |
| for.second: |
| %iprom = sext i32 %i.02 to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %cmps = icmp sgt i32 %inc, 16 |
| br i1 %cmps, label %for.body.backedge, label %for.end |
| |
| for.body.backedge: |
| br label %for.body |
| |
| for.end: |
| ret i32 0 |
| } |
| |
| |
| ; two back branches - loop simplify with convert this to the same form |
| ; as previous before vectorizer sees it, but show that. |
| define i32 @multiple_latch2(ptr %p) { |
| ; CHECK-LABEL: @multiple_latch2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ] |
| ; CHECK-NEXT: [[INC]] = add nsw i32 [[I_02]], 1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]] |
| ; CHECK: for.body.backedge: |
| ; CHECK-NEXT: br label [[FOR_BODY]] |
| ; CHECK: for.second: |
| ; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64 |
| ; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; CHECK-NEXT: store i16 0, ptr [[B]], align 4 |
| ; CHECK-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16 |
| ; CHECK-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| ; TAILFOLD-LABEL: @multiple_latch2( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[FOR_BODY:%.*]] |
| ; TAILFOLD: for.body: |
| ; TAILFOLD-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ] |
| ; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I_02]], 1 |
| ; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16 |
| ; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]] |
| ; TAILFOLD: for.body.backedge: |
| ; TAILFOLD-NEXT: br label [[FOR_BODY]] |
| ; TAILFOLD: for.second: |
| ; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64 |
| ; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[IPROM]] |
| ; TAILFOLD-NEXT: store i16 0, ptr [[B]], align 4 |
| ; TAILFOLD-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16 |
| ; TAILFOLD-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]] |
| ; TAILFOLD: for.end: |
| ; TAILFOLD-NEXT: ret i32 0 |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: |
| %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ], [%inc, %for.second] |
| %inc = add nsw i32 %i.02, 1 |
| %cmp = icmp slt i32 %inc, 16 |
| br i1 %cmp, label %for.body, label %for.second |
| |
| for.second: |
| %iprom = sext i32 %i.02 to i64 |
| %b = getelementptr inbounds i16, ptr %p, i64 %iprom |
| store i16 0, ptr %b, align 4 |
| %cmps = icmp sgt i32 %inc, 16 |
| br i1 %cmps, label %for.body, label %for.end |
| |
| for.end: |
| ret i32 0 |
| } |
| |
| |
| ; Check interaction between block predication and early exits. We need the |
| ; condition on the early exit to remain dead (i.e. not be used when forming |
| ; the predicate mask). |
| define void @scalar_predication(ptr %addr) { |
| ; CHECK-LABEL: @scalar_predication( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE2:%.*]] ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr float, ptr [[ADDR:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr float, ptr [[TMP1]], i32 0 |
| ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, ptr [[TMP2]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = fcmp oeq <2 x float> [[WIDE_LOAD]], zeroinitializer |
| ; CHECK-NEXT: [[TMP4:%.*]] = xor <2 x i1> [[TMP3]], splat (i1 true) |
| ; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x i1> [[TMP4]], i32 0 |
| ; CHECK-NEXT: br i1 [[TMP5]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]] |
| ; CHECK: pred.store.if: |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr float, ptr [[ADDR]], i64 [[TMP0]] |
| ; CHECK-NEXT: store float 1.000000e+01, ptr [[TMP6]], align 4 |
| ; CHECK-NEXT: br label [[PRED_STORE_CONTINUE]] |
| ; CHECK: pred.store.continue: |
| ; CHECK-NEXT: [[TMP7:%.*]] = extractelement <2 x i1> [[TMP4]], i32 1 |
| ; CHECK-NEXT: br i1 [[TMP7]], label [[PRED_STORE_IF1:%.*]], label [[PRED_STORE_CONTINUE2]] |
| ; CHECK: pred.store.if1: |
| ; CHECK-NEXT: [[TMP8:%.*]] = add i64 [[INDEX]], 1 |
| ; CHECK-NEXT: [[TMP9:%.*]] = getelementptr float, ptr [[ADDR]], i64 [[TMP8]] |
| ; CHECK-NEXT: store float 1.000000e+01, ptr [[TMP9]], align 4 |
| ; CHECK-NEXT: br label [[PRED_STORE_CONTINUE2]] |
| ; CHECK: pred.store.continue2: |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 200 |
| ; CHECK-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP20:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 200, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[ADDR]], i64 [[IV]] |
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_BODY:%.*]] |
| ; CHECK: loop.body: |
| ; CHECK-NEXT: [[TMP11:%.*]] = load float, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: [[PRED:%.*]] = fcmp oeq float [[TMP11]], 0.000000e+00 |
| ; CHECK-NEXT: br i1 [[PRED]], label [[LOOP_LATCH]], label [[THEN:%.*]] |
| ; CHECK: then: |
| ; CHECK-NEXT: store float 1.000000e+01, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: br label [[LOOP_LATCH]] |
| ; CHECK: loop.latch: |
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; CHECK-NEXT: br label [[LOOP_HEADER]], !llvm.loop [[LOOP21:![0-9]+]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| ; TAILFOLD-LABEL: @scalar_predication( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; TAILFOLD: loop.header: |
| ; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[ADDR:%.*]], i64 [[IV]] |
| ; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_BODY:%.*]] |
| ; TAILFOLD: loop.body: |
| ; TAILFOLD-NEXT: [[TMP0:%.*]] = load float, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: [[PRED:%.*]] = fcmp oeq float [[TMP0]], 0.000000e+00 |
| ; TAILFOLD-NEXT: br i1 [[PRED]], label [[LOOP_LATCH]], label [[THEN:%.*]] |
| ; TAILFOLD: then: |
| ; TAILFOLD-NEXT: store float 1.000000e+01, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: br label [[LOOP_LATCH]] |
| ; TAILFOLD: loop.latch: |
| ; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER]] |
| ; TAILFOLD: exit: |
| ; TAILFOLD-NEXT: ret void |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ] |
| %gep = getelementptr float, ptr %addr, i64 %iv |
| %exitcond.not = icmp eq i64 %iv, 200 |
| br i1 %exitcond.not, label %exit, label %loop.body |
| |
| loop.body: |
| %0 = load float, ptr %gep, align 4 |
| %pred = fcmp oeq float %0, 0.0 |
| br i1 %pred, label %loop.latch, label %then |
| |
| then: |
| store float 10.0, ptr %gep, align 4 |
| br label %loop.latch |
| |
| loop.latch: |
| %iv.next = add nuw nsw i64 %iv, 1 |
| br label %loop.header |
| |
| exit: |
| ret void |
| } |
| |
| define i32 @me_reduction(ptr %addr) { |
| ; CHECK-LABEL: @me_reduction( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <2 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP3:%.*]], [[VECTOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr i32, ptr [[ADDR:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr i32, ptr [[TMP1]], i32 0 |
| ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP2]], align 4 |
| ; CHECK-NEXT: [[TMP3]] = add <2 x i32> [[VEC_PHI]], [[WIDE_LOAD]] |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 |
| ; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 200 |
| ; CHECK-NEXT: br i1 [[TMP4]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP22:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: [[TMP5:%.*]] = call i32 @llvm.vector.reduce.add.v2i32(<2 x i32> [[TMP3]]) |
| ; CHECK-NEXT: br label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 200, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP5]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ] |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; CHECK-NEXT: [[ACCUM:%.*]] = phi i32 [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ] |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[ADDR]], i64 [[IV]] |
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; CHECK: loop.latch: |
| ; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP6]] |
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND2_NOT:%.*]] = icmp eq i64 [[IV]], 400 |
| ; CHECK-NEXT: br i1 [[EXITCOND2_NOT]], label [[EXIT]], label [[LOOP_HEADER]], !llvm.loop [[LOOP23:![0-9]+]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: [[LCSSA:%.*]] = phi i32 [ 0, [[LOOP_HEADER]] ], [ [[ACCUM_NEXT]], [[LOOP_LATCH]] ] |
| ; CHECK-NEXT: ret i32 [[LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @me_reduction( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; TAILFOLD: loop.header: |
| ; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; TAILFOLD-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ] |
| ; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[ADDR:%.*]], i64 [[IV]] |
| ; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; TAILFOLD: loop.latch: |
| ; TAILFOLD-NEXT: [[TMP0:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]] |
| ; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; TAILFOLD-NEXT: [[EXITCOND2_NOT:%.*]] = icmp eq i64 [[IV]], 400 |
| ; TAILFOLD-NEXT: br i1 [[EXITCOND2_NOT]], label [[EXIT]], label [[LOOP_HEADER]] |
| ; TAILFOLD: exit: |
| ; TAILFOLD-NEXT: [[LCSSA:%.*]] = phi i32 [ 0, [[LOOP_HEADER]] ], [ [[ACCUM_NEXT]], [[LOOP_LATCH]] ] |
| ; TAILFOLD-NEXT: ret i32 [[LCSSA]] |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ] |
| %accum = phi i32 [0, %entry], [%accum.next, %loop.latch] |
| %gep = getelementptr i32, ptr %addr, i64 %iv |
| %exitcond.not = icmp eq i64 %iv, 200 |
| br i1 %exitcond.not, label %exit, label %loop.latch |
| |
| loop.latch: |
| %0 = load i32, ptr %gep, align 4 |
| %accum.next = add i32 %accum, %0 |
| %iv.next = add nuw nsw i64 %iv, 1 |
| %exitcond2.not = icmp eq i64 %iv, 400 |
| br i1 %exitcond2.not, label %exit, label %loop.header |
| |
| exit: |
| %lcssa = phi i32 [0, %loop.header], [%accum.next, %loop.latch] |
| ret i32 %lcssa |
| } |
| |
| ; TODO: The current definition of reduction is too strict, we can vectorize |
| ; this. There's an analogous single exit case where we extract the N-1 |
| ; value of the reduction that we can also handle. If we fix the later, the |
| ; multiple exit case probably falls out. |
| define i32 @me_reduction2(ptr %addr) { |
| ; CHECK-LABEL: @me_reduction2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; CHECK-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ] |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[ADDR:%.*]], i64 [[IV]] |
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; CHECK: loop.latch: |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; CHECK-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]] |
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; CHECK-NEXT: br label [[LOOP_HEADER]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: [[ACCUM_LCSSA:%.*]] = phi i32 [ [[ACCUM]], [[LOOP_HEADER]] ] |
| ; CHECK-NEXT: ret i32 [[ACCUM_LCSSA]] |
| ; |
| ; TAILFOLD-LABEL: @me_reduction2( |
| ; TAILFOLD-NEXT: entry: |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; TAILFOLD: loop.header: |
| ; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] |
| ; TAILFOLD-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ] |
| ; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[ADDR:%.*]], i64 [[IV]] |
| ; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200 |
| ; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]] |
| ; TAILFOLD: loop.latch: |
| ; TAILFOLD-NEXT: [[TMP0:%.*]] = load i32, ptr [[GEP]], align 4 |
| ; TAILFOLD-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]] |
| ; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 |
| ; TAILFOLD-NEXT: br label [[LOOP_HEADER]] |
| ; TAILFOLD: exit: |
| ; TAILFOLD-NEXT: [[ACCUM_LCSSA:%.*]] = phi i32 [ [[ACCUM]], [[LOOP_HEADER]] ] |
| ; TAILFOLD-NEXT: ret i32 [[ACCUM_LCSSA]] |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ] |
| %accum = phi i32 [0, %entry], [%accum.next, %loop.latch] |
| %gep = getelementptr i32, ptr %addr, i64 %iv |
| %exitcond.not = icmp eq i64 %iv, 200 |
| br i1 %exitcond.not, label %exit, label %loop.latch |
| |
| loop.latch: |
| %0 = load i32, ptr %gep, align 4 |
| %accum.next = add i32 %accum, %0 |
| %iv.next = add nuw nsw i64 %iv, 1 |
| br label %loop.header |
| |
| exit: |
| ret i32 %accum |
| } |
| |
