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7416a011e2
As a follow-up to D95982, this patch continues unblocking optimizations that are blocked by pseudu probe instrumention. The optimizations unblocked are: - In-block load propagation. - In-block dead store elimination - Memory copy optimization that turns stores to consecutive memories into a memset. These optimizations are local to a block, so they shouldn't affect the profile quality. Reviewed By: wmi Differential Revision: https://reviews.llvm.org/D100075
26 lines
903 B
LLVM
26 lines
903 B
LLVM
; RUN: opt < %s -memcpyopt -S | FileCheck %s
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%struct.MV = type { i16, i16 }
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define void @test(i32* nocapture %c) nounwind optsize {
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; All the stores in this example should be merged into a single memset.
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; CHECK-NOT: store i32 -1
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; CHECK: call void @llvm.memset.p0i8.i64
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store i32 -1, i32* %c, align 4
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%1 = getelementptr inbounds i32, i32* %c, i32 1
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store i32 -1, i32* %1, align 4
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%2 = getelementptr inbounds i32, i32* %c, i32 2
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store i32 -1, i32* %2, align 4
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call void @llvm.pseudoprobe(i64 5116412291814990879, i64 1, i32 0, i64 -1)
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%3 = getelementptr inbounds i32, i32* %c, i32 3
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store i32 -1, i32* %3, align 4
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%4 = getelementptr inbounds i32, i32* %c, i32 4
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store i32 -1, i32* %4, align 4
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ret void
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}
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; Function Attrs: inaccessiblememonly nounwind willreturn
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declare void @llvm.pseudoprobe(i64, i64, i32, i64) #0
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attributes #0 = { inaccessiblememonly nounwind willreturn }
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