be58a220e9
Summary: This change is part of step five in the series of changes to remove alignment argument from memcpy/memmove/memset in favour of alignment attributes. In particular, this changes the CodeGenPrepare pass to be more aggressive in improving the source and destination alignments of memcpy/memmove/memset by exploiting our new ability to record independent alignments for each argument. Steps: Step 1) Remove alignment parameter and create alignment parameter attributes for memcpy/memmove/memset. ( rL322965, rC322964, rL322963 ) Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing source and dest alignments. ( rL323597 ) Step 3) Update Clang to use the new IRBuilder API. ( rC323617 ) Step 4) Update Polly to use the new IRBuilder API. ( rL323618 ) Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API, and those that use use MemIntrinsicInst::[get|set]Alignment() to use [get|set]DestAlignment() and [get|set]SourceAlignment() instead. ( rL323886 ) Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the MemIntrinsicInst::[get|set]Alignment() methods. Reference http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html llvm-svn: 323891
44 lines
2.2 KiB
LLVM
44 lines
2.2 KiB
LLVM
; RUN: opt -codegenprepare -mtriple=arm7-unknown-unknown -S < %s | FileCheck %s
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i1) nounwind
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declare void @llvm.memmove.p0i8.p0i8.i32(i8*, i8*, i32, i1) nounwind
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declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind
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define void @test_memcpy(i8* align 4 %dst, i8* align 8 %src, i32 %N) {
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; CHECK-LABEL: @test_memcpy
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 8 %src, i32 %N, i1 false)
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 8 %src, i32 %N, i1 false)
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dst, i8* align 16 %src, i32 %N, i1 false)
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entry:
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %N, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst, i8* align 2 %src, i32 %N, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dst, i8* align 16 %src, i32 %N, i1 false)
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ret void
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}
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define void @test_memmove(i8* align 4 %dst, i8* align 8 %src, i32 %N) {
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; CHECK-LABEL: @test_memmove
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; CHECK: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 8 %src, i32 %N, i1 false)
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; CHECK: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 8 %src, i32 %N, i1 false)
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; CHECK: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 8 %dst, i8* align 16 %src, i32 %N, i1 false)
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entry:
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %N, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %dst, i8* align 2 %src, i32 %N, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* align 8 %dst, i8* align 16 %src, i32 %N, i1 false)
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ret void
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}
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define void @test_memset(i8* align 4 %dst, i8 %val, i32 %N) {
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; CHECK-LABEL: @test_memset
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; CHECK: call void @llvm.memset.p0i8.i32(i8* align 4 %dst, i8 %val, i32 %N, i1 false)
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; CHECK: call void @llvm.memset.p0i8.i32(i8* align 4 %dst, i8 %val, i32 %N, i1 false)
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; CHECK: call void @llvm.memset.p0i8.i32(i8* align 8 %dst, i8 %val, i32 %N, i1 false)
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entry:
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call void @llvm.memset.p0i8.i32(i8* %dst, i8 %val, i32 %N, i1 false)
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call void @llvm.memset.p0i8.i32(i8* align 2 %dst, i8 %val, i32 %N, i1 false)
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call void @llvm.memset.p0i8.i32(i8* align 8 %dst, i8 %val, i32 %N, i1 false)
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ret void
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}
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