1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s 3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-unknown-linux-gnu" 5 6declare void @ff() 7 8define void @test(ptr noalias nocapture %base, i64 %size) #1 { 9; CHECK-LABEL: @test( 10; CHECK-NEXT: entry: 11; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i64 [[SIZE:%.*]], 0 12; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]] 13; CHECK: for.body.preheader: 14; CHECK-NEXT: br label [[FOR_BODY:%.*]] 15; CHECK: for.body: 16; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ] 17; CHECK-NEXT: tail call void @ff() 18; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[BASE:%.*]], i64 [[INDVARS_IV]] 19; CHECK-NEXT: store i8 0, ptr [[ARRAYIDX]], align 1 20; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1 21; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[SIZE]] 22; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]] 23; CHECK: for.end.loopexit: 24; CHECK-NEXT: br label [[FOR_END]] 25; CHECK: for.end: 26; CHECK-NEXT: ret void 27; 28entry: 29 %cmp3 = icmp eq i64 %size, 0 30 br i1 %cmp3, label %for.end, label %for.body.preheader 31 32for.body.preheader: ; preds = %entry 33 br label %for.body 34 35for.body: ; preds = %for.body.preheader, %for.body 36 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] 37 tail call void @ff() 38 %arrayidx = getelementptr inbounds i8, ptr %base, i64 %indvars.iv 39 store i8 0, ptr %arrayidx, align 1 40 %indvars.iv.next = add i64 %indvars.iv, 1 41 %exitcond = icmp ne i64 %indvars.iv.next, %size 42 br i1 %exitcond, label %for.body, label %for.end.loopexit 43 44for.end.loopexit: ; preds = %for.body 45 br label %for.end 46 47for.end: ; preds = %for.end.loopexit, %entry 48 ret void 49} 50 51attributes #1 = { uwtable } 52