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98a3974775
Summary: In the benchmark (https://github.com/vetter/shoc) we are researching, the duplicated load is not eliminated because MemoryDependenceAnalysis hit the BlockScanLimit. This patch change it into a command line option instead of a hardcoded value. Patched by Xuetian Weng. Test Plan: test/Analysis/MemoryDependenceAnalysis/memdep-block-scan-limit.ll Reviewers: jingyue, reames Subscribers: reames, llvm-commits Differential Revision: http://reviews.llvm.org/D11366 llvm-svn: 242842
16 lines
427 B
LLVM
16 lines
427 B
LLVM
; RUN: opt -S -memdep -gvn -basicaa < %s | FileCheck %s
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; RUN: opt -S -memdep -memdep-block-scan-limit=1 -gvn -basicaa < %s | FileCheck %s --check-prefix=WITH-LIMIT
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; CHECK-LABEL: @test(
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; CHECK: load
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; CHECK-NOT: load
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; WITH-LIMIT-LABEL: @test(
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; WITH-LIMIT-CHECK: load
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; WITH-LIMIT-CHECK: load
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define i32 @test(i32* %p) {
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%1 = load i32, i32* %p
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%2 = add i32 %1, 3
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%3 = load i32, i32* %p
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%4 = add i32 %2, %3
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ret i32 %4
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}
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