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Change memcpy/memove/memset to have dest and source alignment attributes (Step 1). 

Summary:
 Upstream LLVM is changing the the prototypes of the @llvm.memcpy/memmove/memset
intrinsics. This change updates the polly tests for this change.

 The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.

 This change removes the alignment argument in favour of placing the alignment
attribute on the source and destination pointers of the memory intrinsic call.

 For example, code which used to read:
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)

 At this time the source and destination alignments must be the same (Step 1).
Step 2 of the change, to be landed shortly, will relax that contraint and allow
the source and destination to have different alignments.

llvm-svn: 322963
This commit is contained in:
Daniel Neilson 2018-01-19 17:12:48 +00:00
parent cc7a8f14bd
commit 751a2cebc5
3 changed files with 3 additions and 3 deletions
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2
polly/test/ScopInfo/memcpy.ll
View File

@ -23,7 +23,7 @@
; IR: %[[r4:[a-zA-Z0-9]*]] = bitcast i64* %scevgep8 to i8*
;
; IR: polly.stmt.for.body3:
; IR: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %[[r2]], i8* %[[r4]], i64 37, i32 4, i1 false)
; IR: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %[[r2]], i8* align 4 %[[r4]], i64 37, i1 false)
;
;
; #include <string.h>

2
polly/test/ScopInfo/memmove.ll
View File

@ -23,7 +23,7 @@
; IR: %[[r4:[a-zA-Z0-9]*]] = bitcast i64* %scevgep8 to i8*
;
; IR: polly.stmt.for.body3:
; IR: call void @llvm.memmove.p0i8.p0i8.i64(i8* %[[r2]], i8* %[[r4]], i64 32, i32 4, i1 false)
; IR: call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %[[r2]], i8* align 4 %[[r4]], i64 32, i1 false)
;
; #include <string.h>
;

2
polly/test/ScopInfo/memset.ll
View File

@ -16,7 +16,7 @@
; IR: %[[r1:[a-zA-Z0-9]*]] = bitcast i32* %A to i8*
;
; IR: polly.stmt.for.body3:
; IR: call void @llvm.memset.p0i8.i64(i8* %[[r1]], i8 36, i64 187, i32 4, i1 false)
; IR: call void @llvm.memset.p0i8.i64(i8* align 4 %[[r1]], i8 36, i64 187, i1 false)
;
; #include <string.h>
;