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26 lines
608 B
LLVM
26 lines
608 B
LLVM
; This testcase ensures that redundant loads are eliminated when they should
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; be. All RL variables (redundant loads) should be eliminated.
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;
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; RUN: llvm-as < %s | opt -load-vn -gcse | llvm-dis | not grep %RL
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;
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define i32 @test1(i32* %P) {
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%A = load i32* %P ; <i32> [#uses=1]
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%RL = load i32* %P ; <i32> [#uses=1]
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%C = add i32 %A, %RL ; <i32> [#uses=1]
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ret i32 %C
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}
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define i32 @test2(i32* %P) {
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%A = load i32* %P ; <i32> [#uses=1]
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br label %BB2
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BB2: ; preds = %0
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br label %BB3
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BB3: ; preds = %BB2
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%RL = load i32* %P ; <i32> [#uses=1]
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%B = add i32 %A, %RL ; <i32> [#uses=1]
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ret i32 %B
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}
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