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llvm-mirror/test/Analysis/Lint/memintrin.ll

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[Lint] Upgrade uses of MemoryIntrinic::getAlignment() to new API. (NFCI) 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 Lint analysis to cease using the old getAlignment() API of MemoryIntrinsic in favour of getting source & dest specific alignments through the new API. 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. 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: 323886
2018-01-31 17:42:15 +01:00
; RUN: opt -lint -disable-output < %s 2>&1 | FileCheck %s
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) nounwind argmemonly
define void @f_memcpy() {
entry:
%dst = alloca [1000 x i8], align 2
%src = alloca [1000 x i8], align 4
%dst.i8 = bitcast [1000 x i8]* %dst to i8*
%src.i8 = bitcast [1000 x i8]* %src to i8*
; CHECK: Undefined behavior: Memory reference address is misaligned
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
; CHECK: Undefined behavior: Memory reference address is misaligned
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 8 %src.i8, i32 200, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 8 %src.i8, i32 200, i1 false)
; CHECK-NOT: @llvm.memcpy.p0i8.p0i8.i32
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 2 %src.i8, i32 200, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
ret void
}
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) nounwind argmemonly
define void @f_memmove() {
entry:
%dst = alloca [1000 x i8], align 2
%src = alloca [1000 x i8], align 4
%dst.i8 = bitcast [1000 x i8]* %dst to i8*
%src.i8 = bitcast [1000 x i8]* %src to i8*
; CHECK: Undefined behavior: Memory reference address is misaligned
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
; CHECK: Undefined behavior: Memory reference address is misaligned
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 8 %src.i8, i32 200, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 8 %src.i8, i32 200, i1 false)
; CHECK-NOT: @llvm.memmove.p0i8.p0i8.i32
call void @llvm.memmove.p0i8.p0i8.i32(i8* align 1 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 2 %src.i8, i32 200, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %dst.i8, i8* align 4 %src.i8, i32 200, i1 false)
ret void
}
declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) nounwind argmemonly
define void @f_memset() {
entry:
%dst = alloca [1000 x i8], align 2
%dst.i8 = bitcast [1000 x i8]* %dst to i8*
; CHECK: Undefined behavior: Memory reference address is misaligned
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* align 4 %dst.i8, i8 55, i32 200, i1 false)
call void @llvm.memset.p0i8.i32(i8* align 4 %dst.i8, i8 55, i32 200, i1 false)
; CHECK-NOT: @llvm.memset.p0i8.i32
call void @llvm.memset.p0i8.i32(i8* align 1 %dst.i8, i8 55, i32 200, i1 false)
call void @llvm.memset.p0i8.i32(i8* align 2 %dst.i8, i8 55, i32 200, i1 false)
ret void
}
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