| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -loop-idiom -S %s | FileCheck %s |
| |
| define void @reuse_cast_1(float** %ptr, i1 %c) { |
| ; CHECK-LABEL: @reuse_cast_1( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP_0:%.*]] |
| ; CHECK: loop.0: |
| ; CHECK-NEXT: [[TMP:%.*]] = load float*, float** [[PTR:%.*]], align 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = bitcast float* [[TMP]] to i8* |
| ; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_2_PREHEADER:%.*]], label [[LOOP_1_PREHEADER:%.*]] |
| ; CHECK: loop.1.preheader: |
| ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP2]], i8 0, i64 400, i1 false) |
| ; CHECK-NEXT: br label [[LOOP_1:%.*]] |
| ; CHECK: loop.2.preheader: |
| ; CHECK-NEXT: br label [[LOOP_2:%.*]] |
| ; CHECK: loop.1: |
| ; CHECK-NEXT: [[IV_1:%.*]] = phi i64 [ [[IV_1_NEXT:%.*]], [[LOOP_1]] ], [ 0, [[LOOP_1_PREHEADER]] ] |
| ; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds float, float* [[TMP]], i64 [[IV_1]] |
| ; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1 |
| ; CHECK-NEXT: [[C_1:%.*]] = icmp ne i64 [[IV_1_NEXT]], 100 |
| ; CHECK-NEXT: br i1 [[C_1]], label [[LOOP_1]], label [[LOOP_0_LATCH_LOOPEXIT1:%.*]] |
| ; CHECK: loop.2: |
| ; CHECK-NEXT: [[IV_2:%.*]] = phi i64 [ [[IV_2_NEXT:%.*]], [[LOOP_2]] ], [ 0, [[LOOP_2_PREHEADER]] ] |
| ; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds float, float* [[TMP]], i64 [[IV_2]] |
| ; CHECK-NEXT: store float 0.000000e+00, float* [[TMP10]], align 4 |
| ; CHECK-NEXT: [[TMP11:%.*]] = load float*, float** [[PTR]], align 8 |
| ; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds float, float* [[TMP11]], i64 [[IV_2]] |
| ; CHECK-NEXT: [[TMP13:%.*]] = load float, float* [[TMP12]], align 4 |
| ; CHECK-NEXT: [[IV_2_NEXT]] = add nuw nsw i64 [[IV_2]], 1 |
| ; CHECK-NEXT: [[C_2:%.*]] = icmp ne i64 [[IV_2_NEXT]], 100 |
| ; CHECK-NEXT: br i1 [[C_2]], label [[LOOP_2]], label [[LOOP_0_LATCH_LOOPEXIT:%.*]] |
| ; CHECK: loop.0.latch.loopexit: |
| ; CHECK-NEXT: br label [[LOOP_0_LATCH:%.*]] |
| ; CHECK: loop.0.latch.loopexit1: |
| ; CHECK-NEXT: br label [[LOOP_0_LATCH]] |
| ; CHECK: loop.0.latch: |
| ; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond() |
| ; CHECK-NEXT: br i1 [[C_0]], label [[LOOP_0]], label [[END:%.*]] |
| ; CHECK: end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop.0 |
| |
| loop.0: ; preds = %loop.0.latch, %entry |
| %tmp = load float*, float** %ptr, align 8 |
| br i1 %c, label %loop.2, label %loop.1 |
| |
| loop.1: ; preds = %loop.1, %loop.0 |
| %iv.1 = phi i64 [ %iv.1.next, %loop.1 ], [ 0, %loop.0 ] |
| %tmp4 = getelementptr inbounds float, float* %tmp, i64 %iv.1 |
| store float 0.000000e+00, float* %tmp4, align 4 |
| %iv.1.next = add nuw nsw i64 %iv.1, 1 |
| %c.1 = icmp ne i64 %iv.1.next, 100 |
| br i1 %c.1, label %loop.1, label %loop.0.latch |
| |
| loop.2: ; preds = %loop.2, %loop.0 |
| %iv.2 = phi i64 [ %iv.2.next, %loop.2 ], [ 0, %loop.0 ] |
| %tmp10 = getelementptr inbounds float, float* %tmp, i64 %iv.2 |
| store float 0.000000e+00, float* %tmp10, align 4 |
| %tmp11 = load float*, float** %ptr, align 8 |
| %tmp12 = getelementptr inbounds float, float* %tmp11, i64 %iv.2 |
| %tmp13 = load float, float* %tmp12, align 4 |
| %iv.2.next = add nuw nsw i64 %iv.2, 1 |
| %c.2 = icmp ne i64 %iv.2.next, 100 |
| br i1 %c.2, label %loop.2, label %loop.0.latch |
| |
| loop.0.latch: ; preds = %loop.2, %loop.1 |
| %c.0 = call i1 @cond() |
| br i1 %c.0, label %loop.0, label %end |
| |
| end: ; preds = %loop.0.latch |
| ret void |
| } |
| |
| declare i1 @cond() |
| |
| declare void @use.i8(i8*) |
| |
| declare void @use.i1(i1) |
| |
| define void @reuse_cast_2(i32 %x, i32* %ptr.1.start) { |
| ; CHECK-LABEL: @reuse_cast_2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[PTR_1_START2:%.*]] = bitcast i32* [[PTR_1_START:%.*]] to i8* |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [2 x i32], align 4 |
| ; CHECK-NEXT: [[STACK1:%.*]] = bitcast [2 x i32]* [[STACK]] to i8* |
| ; CHECK-NEXT: [[C_0:%.*]] = icmp sgt i32 [[X:%.*]], 0 |
| ; CHECK-NEXT: [[CAST_TO_REUSE:%.*]] = bitcast [2 x i32]* [[STACK]] to i8* |
| ; CHECK-NEXT: [[PTR_2_START:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[STACK]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @use.i8(i8* [[CAST_TO_REUSE]]) |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[STACK1]], i8* align 4 [[PTR_1_START2]], i64 8, i1 false) |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[PTR_1:%.*]] = phi i32* [ [[PTR_1_START]], [[ENTRY]] ], [ [[PTR_1_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[PTR_2:%.*]] = phi i32* [ [[PTR_2_START]], [[ENTRY]] ], [ [[PTR_2_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[PTR_1_NEXT]] = getelementptr inbounds i32, i32* [[PTR_1]], i64 1 |
| ; CHECK-NEXT: [[LV:%.*]] = load i32, i32* [[PTR_1]], align 4 |
| ; CHECK-NEXT: [[PTR_2_NEXT]] = getelementptr inbounds i32, i32* [[PTR_2]], i64 1 |
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 |
| ; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[IV]], 0 |
| ; CHECK-NEXT: br i1 [[C_1]], label [[LOOP]], label [[EXIT:%.*]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: call void @use.i1(i1 [[C_0]]) |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %stack = alloca [2 x i32], align 4 |
| %c.0 = icmp sgt i32 %x, 0 |
| %cast.to.reuse = bitcast [2 x i32]* %stack to i8* |
| %ptr.2.start = getelementptr inbounds [2 x i32], [2 x i32]* %stack, i64 0, i64 0 |
| call void @use.i8(i8* %cast.to.reuse) |
| br label %loop |
| |
| loop: ; preds = %loop, %entry |
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ] |
| %ptr.1 = phi i32* [ %ptr.1.start, %entry ], [ %ptr.1.next, %loop ] |
| %ptr.2 = phi i32* [ %ptr.2.start, %entry ], [ %ptr.2.next, %loop ] |
| %ptr.1.next = getelementptr inbounds i32, i32* %ptr.1, i64 1 |
| %lv = load i32, i32* %ptr.1, align 4 |
| %ptr.2.next = getelementptr inbounds i32, i32* %ptr.2, i64 1 |
| store i32 %lv, i32* %ptr.2, align 4 |
| %iv.next = add nuw nsw i32 %iv, 1 |
| %c.1 = icmp eq i32 %iv, 0 |
| br i1 %c.1, label %loop, label %exit |
| |
| exit: ; preds = %loop |
| call void @use.i1(i1 %c.0) |
| ret void |
| } |