| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare void @ff() |
| |
| define void @test(ptr noalias nocapture %base, i64 %size) #1 { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i64 [[SIZE:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]] |
| ; CHECK: for.body.preheader: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: tail call void @ff() |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[BASE:%.*]], i64 [[INDVARS_IV]] |
| ; CHECK-NEXT: store i8 0, ptr [[ARRAYIDX]], align 1 |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[SIZE]] |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]] |
| ; CHECK: for.end.loopexit: |
| ; CHECK-NEXT: br label [[FOR_END]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp3 = icmp eq i64 %size, 0 |
| br i1 %cmp3, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| tail call void @ff() |
| %arrayidx = getelementptr inbounds i8, ptr %base, i64 %indvars.iv |
| store i8 0, ptr %arrayidx, align 1 |
| %indvars.iv.next = add i64 %indvars.iv, 1 |
| %exitcond = icmp ne i64 %indvars.iv.next, %size |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| } |
| |
| attributes #1 = { uwtable } |