| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -loop-reduce -S < %s | FileCheck %s |
| |
| ; Check when we use an outerloop induction variable inside of an innerloop |
| ; induction value expr, LSR can still choose to use single induction variable |
| ; for the innerloop and share it in multiple induction value exprs. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define void @foo(i32 %size, i32 %nsteps, i32 %hsize, i32* %lined, i8* %maxarray) { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP215:%.*]] = icmp sgt i32 [[SIZE:%.*]], 1 |
| ; CHECK-NEXT: [[T0:%.*]] = zext i32 [[SIZE]] to i64 |
| ; CHECK-NEXT: [[T1:%.*]] = sext i32 [[NSTEPS:%.*]] to i64 |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[T0]], -1 |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[LSR_IV1:%.*]] = phi i64 [ [[LSR_IV_NEXT2:%.*]], [[FOR_INC:%.*]] ], [ 1, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: [[INDVARS_IV2:%.*]] = phi i64 [ [[INDVARS_IV_NEXT3:%.*]], [[FOR_INC]] ], [ 0, [[ENTRY]] ] |
| ; CHECK-NEXT: br i1 [[CMP215]], label [[FOR_BODY2_PREHEADER:%.*]], label [[FOR_INC]] |
| ; CHECK: for.body2.preheader: |
| ; CHECK-NEXT: br label [[FOR_BODY2:%.*]] |
| ; CHECK: for.body2: |
| ; CHECK-NEXT: [[LSR_IV3:%.*]] = phi i8* [ [[SCEVGEP:%.*]], [[FOR_BODY2]] ], [ [[MAXARRAY:%.*]], [[FOR_BODY2_PREHEADER]] ] |
| ; CHECK-NEXT: [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[FOR_BODY2]] ], [ [[TMP0]], [[FOR_BODY2_PREHEADER]] ] |
| ; CHECK-NEXT: [[SCEVGEP6:%.*]] = getelementptr i8, i8* [[LSR_IV3]], i64 1 |
| ; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[SCEVGEP6]], align 1 |
| ; CHECK-NEXT: [[SCEVGEP5:%.*]] = getelementptr i8, i8* [[LSR_IV3]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[V2:%.*]] = load i8, i8* [[SCEVGEP5]], align 1 |
| ; CHECK-NEXT: [[TMPV:%.*]] = xor i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[SCEVGEP4:%.*]] = getelementptr i8, i8* [[LSR_IV3]], i64 [[LSR_IV1]] |
| ; CHECK-NEXT: store i8 [[TMPV]], i8* [[SCEVGEP4]], align 1 |
| ; CHECK-NEXT: [[LSR_IV_NEXT]] = add i64 [[LSR_IV]], -1 |
| ; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, i8* [[LSR_IV3]], i64 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[LSR_IV_NEXT]], 0 |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY2]], label [[FOR_INC_LOOPEXIT:%.*]] |
| ; CHECK: for.inc.loopexit: |
| ; CHECK-NEXT: br label [[FOR_INC]] |
| ; CHECK: for.inc: |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT3]] = add nuw nsw i64 [[INDVARS_IV2]], 1 |
| ; CHECK-NEXT: [[LSR_IV_NEXT2]] = add nuw nsw i64 [[LSR_IV1]], [[T0]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[INDVARS_IV_NEXT3]], [[T1]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]] |
| ; CHECK: for.end.loopexit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp215 = icmp sgt i32 %size, 1 |
| %t0 = zext i32 %size to i64 |
| %t1 = sext i32 %nsteps to i64 |
| %sub2 = sub i64 %t0, 2 |
| br label %for.body |
| |
| for.body: ; preds = %for.inc, %entry |
| %indvars.iv2 = phi i64 [ %indvars.iv.next3, %for.inc ], [ 0, %entry ] |
| %t2 = mul nsw i64 %indvars.iv2, %t0 |
| br i1 %cmp215, label %for.body2.preheader, label %for.inc |
| |
| for.body2.preheader: ; preds = %for.body |
| br label %for.body2 |
| |
| ; Check LSR only generates two induction variables for for.body2 one for compare and |
| ; one to shared by multiple array accesses. |
| |
| for.body2: ; preds = %for.body2.preheader, %for.body2 |
| %indvars.iv = phi i64 [ 1, %for.body2.preheader ], [ %indvars.iv.next, %for.body2 ] |
| %arrayidx1 = getelementptr inbounds i8, i8* %maxarray, i64 %indvars.iv |
| %v1 = load i8, i8* %arrayidx1, align 1 |
| %idx2 = add nsw i64 %indvars.iv, %sub2 |
| %arrayidx2 = getelementptr inbounds i8, i8* %maxarray, i64 %idx2 |
| %v2 = load i8, i8* %arrayidx2, align 1 |
| %tmpv = xor i8 %v1, %v2 |
| %t4 = add nsw i64 %t2, %indvars.iv |
| %add.ptr = getelementptr inbounds i8, i8* %maxarray, i64 %t4 |
| store i8 %tmpv, i8* %add.ptr, align 1 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %wide.trip.count = zext i32 %size to i64 |
| %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count |
| br i1 %exitcond, label %for.body2, label %for.inc.loopexit |
| |
| for.inc.loopexit: ; preds = %for.body2 |
| br label %for.inc |
| |
| for.inc: ; preds = %for.inc.loopexit, %for.body |
| %indvars.iv.next3 = add nuw nsw i64 %indvars.iv2, 1 |
| %cmp = icmp slt i64 %indvars.iv.next3, %t1 |
| br i1 %cmp, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.inc |
| ret void |
| } |
