1 ; RUN: opt -loop-idiom < %s -S | FileCheck %s 2 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 3 target triple = "x86_64-unknown-linux-gnu" 4 5 declare void @ff() 6 7 define void @test(i8* noalias nocapture %base, i64 %size) #1 { 8 entry: 9 %cmp3 = icmp eq i64 %size, 0 10 br i1 %cmp3, label %for.end, label %for.body.preheader 11 12 for.body.preheader: ; preds = %entry 13 br label %for.body 14 15 for.body: ; preds = %for.body.preheader, %for.body 16 ; CHECK-LABEL: @test( 17 ; CHECK-NOT: llvm.memset 18 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] 19 tail call void @ff() 20 %arrayidx = getelementptr inbounds i8, i8* %base, i64 %indvars.iv 21 store i8 0, i8* %arrayidx, align 1 22 %indvars.iv.next = add i64 %indvars.iv, 1 23 %exitcond = icmp ne i64 %indvars.iv.next, %size 24 br i1 %exitcond, label %for.body, label %for.end.loopexit 25 26 for.end.loopexit: ; preds = %for.body 27 br label %for.end 28 29 for.end: ; preds = %for.end.loopexit, %entry 30 ret void 31 } 32 33 attributes #1 = { uwtable } 34
