forked from OSchip/llvm-project
24 lines
764 B
LLVM
24 lines
764 B
LLVM
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; RUN: opt -instcombine %s -S 2>&1 | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes=instcombine %s -S 2>&1 | FileCheck %s
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; Checking successful store-load optimization of array length.
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; Function below should deduce just to "return length".
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; Doable only if instcombine has access to alias-analysis.
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define i32 @test1(i32 %length) {
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; CHECK-LABEL: entry:
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entry:
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%array = alloca i32, i32 2
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; CHECK-NOT: %array
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%length_gep = getelementptr inbounds i32, i32 * %array, i32 0
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%value_gep = getelementptr inbounds i32, i32 * %array, i32 1
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store i32 %length, i32 * %length_gep
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store i32 0, i32 * %value_gep
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%loaded_length = load i32, i32 * %length_gep
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; CHECK-NOT: %loaded_length = load i32
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ret i32 %loaded_length
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; CHECK: ret i32 %length
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}
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