1 ; RUN: opt -S -basicaa -licm < %s | FileCheck %s 2 3 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 4 target triple = "i686-pc-windows-msvc18.0.0" 5 6 @v = common global i32 zeroinitializer, align 4 7 8 ; Make sure the store to v is not sunk past the memset 9 ; CHECK-LABEL: @main 10 ; CHECK: for.body: 11 ; CHECK-NEXT: store i32 1, i32* @v 12 ; CHECK-NEXT: tail call void @llvm.memset 13 ; CHECK: end: 14 ; CHECK-NEXT: ret i32 0 15 16 define i32 @main(i1 %k) { 17 entry: 18 br label %for.body 19 20 for.body: 21 store i32 1, i32* @v, align 4 22 tail call void @llvm.memset.p0i8.i32(i8* bitcast (i32* @v to i8*), i8 0, i32 4, i32 4, i1 false) 23 br label %for.latch 24 25 for.latch: 26 br i1 %k, label %for.body, label %end 27 28 end: 29 ret i32 0 30 } 31 32 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) 33
