forked from OSchip/llvm-project
27 lines
841 B
LLVM
27 lines
841 B
LLVM
; RUN: opt -O3 -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64"
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@v = internal unnamed_addr global i32 0, align 4
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@p = common global i32* null, align 8
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; Function Attrs: norecurse nounwind
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define void @f(i32 %n) {
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entry:
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%0 = load i32, i32* @v, align 4
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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* @v, align 4
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%1 = load i32*, i32** @p, align 8
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store i32 %n, i32* %1, align 4
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%2 = load i32, i32* @v, align 4
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%inc1 = add nsw i32 %2, 1
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store i32 %inc1, i32* @v, align 4
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ret void
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}
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; check variable v is loaded only once after optimization, which should be
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; prove that globalsAA survives until the optimization that can use it to
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; optimize away the duplicate load/stores on variable v.
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; CHECK: load i32, i32* @v, align 4
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; CHECK-NOT: load i32, i32* @v, align 4
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