| ; 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 |
