; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -O1 -S | FileCheck %s

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"

@a = internal global [3 x i32] zeroinitializer, align 4
@b = common global i32 0, align 4

; The important thing we're checking here is that the value from the memset
; rather than the preceding store is forwarded.

define i32 @main() {
; CHECK-LABEL: define noundef i32 @main(
; CHECK-SAME: ) local_unnamed_addr #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    store i32 3, ptr @b, align 4
; CHECK-NEXT:    ret i32 0
;
entry:
  %retval = alloca i32, align 4
  %c = alloca [1 x i32], align 4
  store i32 0, ptr %retval, align 4
  call void @llvm.memset.p0.i64(ptr align 4 %c, i8 0, i64 4, i1 false)
  store i32 1, ptr getelementptr inbounds ([3 x i32], ptr @a, i64 0, i64 2), align 4
  store i32 0, ptr @b, align 4
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %0 = load i32, ptr @b, align 4
  %cmp = icmp slt i32 %0, 3
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %1 = load i32, ptr @b, align 4
  %idxprom = sext i32 %1 to i64
  %arrayidx = getelementptr inbounds [3 x i32], ptr @a, i64 0, i64 %idxprom
  store i32 0, ptr %arrayidx, align 4
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %2 = load i32, ptr @b, align 4
  %inc = add nsw i32 %2, 1
  store i32 %inc, ptr @b, align 4
  br label %for.cond

for.end:                                          ; preds = %for.cond
  %3 = load i32, ptr getelementptr inbounds ([3 x i32], ptr @a, i64 0, i64 2), align 4
  %cmp1 = icmp ne i32 %3, 0
  br i1 %cmp1, label %if.then, label %if.end

if.then:                                          ; preds = %for.end
  call void @abort() #3
  unreachable

if.end:                                           ; preds = %for.end
  ret i32 0
}

; Function Attrs: nounwind argmemonly
declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind argmemonly

; Function Attrs: noreturn nounwind
declare void @abort() noreturn nounwind