| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 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 } |