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Update the memcpy rewriting to fully support widened int rewriting. This

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includes extracting ints for copying elsewhere and inserting ints when
copying into the alloca. This should fix the CanSROA assertion coming
out of Clang's regression test suite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165931 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-10-15 10:24:43 +00:00
parent 94fc64c42f
commit d2cd73f6a5
2 changed files with 31 additions and 9 deletions
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6
test/Transforms/SROA/basictest.ll
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@@ -1046,8 +1046,12 @@ entry:
; Or a memset of the whole thing.
call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 8, i32 1, i1 false)
; Store to the high 32-bits...
; Write to the high 32-bits with a memcpy.
%X.sroa.0.4.raw_idx4.i = getelementptr inbounds i8* %0, i32 4
%d.raw = bitcast double* %d to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %X.sroa.0.4.raw_idx4.i, i8* %d.raw, i32 4, i32 1, i1 false)
; Store to the high 32-bits...
%X.sroa.0.4.cast5.i = bitcast i8* %X.sroa.0.4.raw_idx4.i to i32*
store i32 1072693248, i32* %X.sroa.0.4.cast5.i, align 4