derek.holloway
7502bf64a4
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65 lines
2.2 KiB
LLVM
65 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -O1 -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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@a = internal global [3 x i32] zeroinitializer, align 4
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@b = common global i32 0, align 4
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; The important thing we're checking here is that the value from the memset
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; rather than the preceding store is forwarded.
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define i32 @main() {
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; CHECK-LABEL: define noundef i32 @main(
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; CHECK-SAME: ) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: store i32 3, ptr @b, align 4
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%retval = alloca i32, align 4
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%c = alloca [1 x i32], align 4
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store i32 0, ptr %retval, align 4
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call void @llvm.memset.p0.i64(ptr align 4 %c, i8 0, i64 4, i1 false)
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store i32 1, ptr getelementptr inbounds ([3 x i32], ptr @a, i64 0, i64 2), align 4
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store i32 0, ptr @b, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, ptr @b, align 4
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%cmp = icmp slt i32 %0, 3
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%1 = load i32, ptr @b, align 4
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%idxprom = sext i32 %1 to i64
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%arrayidx = getelementptr inbounds [3 x i32], ptr @a, i64 0, i64 %idxprom
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store i32 0, ptr %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%2 = load i32, ptr @b, align 4
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%inc = add nsw i32 %2, 1
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store i32 %inc, ptr @b, align 4
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br label %for.cond
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for.end: ; preds = %for.cond
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%3 = load i32, ptr getelementptr inbounds ([3 x i32], ptr @a, i64 0, i64 2), align 4
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%cmp1 = icmp ne i32 %3, 0
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br i1 %cmp1, label %if.then, label %if.end
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if.then: ; preds = %for.end
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call void @abort() #3
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unreachable
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if.end: ; preds = %for.end
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ret i32 0
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}
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; Function Attrs: nounwind argmemonly
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind argmemonly
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; Function Attrs: noreturn nounwind
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declare void @abort() noreturn nounwind
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