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Imported Upstream version 5.18.0.167
Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
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; RUN: opt -S -O1 < %s | FileCheck %s
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@a = common global i32 0, align 4
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; @hook_me is weak, so GMR must not eliminate the reload of @a in @f,
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; even though @hook_me doesn't mod or ref @a.
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; Function Attrs: nounwind ssp uwtable
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define weak i32 @hook_me() {
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ret i32 0
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}
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; Function Attrs: nounwind ssp uwtable
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define i32 @f() {
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%1 = alloca i32, align 4
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store i32 4, i32* @a, align 4
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%2 = call i32 @hook_me()
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; CHECK: load i32, i32* @a, align 4
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%3 = load i32, i32* @a, align 4
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%4 = add nsw i32 %3, %2
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store i32 %4, i32* @a, align 4
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%5 = load i32, i32* %1
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ret i32 %5
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}
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