RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2024-11-28 14:10:41 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[ConstantFolding] Handle bitcasts of undef fp vector elements

Browse Source 
We used the wrong type for constructing a zero vector element which led
to type mismatches.

This fixes PR28771.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277197 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2016-07-29 18:48:27 +00:00
parent b2cc749171
commit 7e8508b6e6
2 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Analysis/ConstantFolding.cpp
View File

@ -187,7 +187,7 @@ Constant *FoldBitCast(Constant *C, Type *DestTy, const DataLayout &DL) {
for (unsigned j = 0; j != Ratio; ++j) {
Constant *Src = C->getAggregateElement(SrcElt++);
if (Src && isa<UndefValue>(Src))
Src = Constant::getNullValue(SrcEltTy);
Src = Constant::getNullValue(C->getType()->getVectorElementType());
else
Src = dyn_cast_or_null<ConstantInt>(Src);
if (!Src) // Reject constantexpr elements.

7
test/Transforms/InstCombine/cast.ll
View File

@ -1386,3 +1386,10 @@ define i32 @test89() {
; CHECK-NEXT: ret i32 393216
ret i32 bitcast (<2 x i16> <i16 6, i16 undef> to i32)
}
define <2 x i32> @test90() {
; CHECK-LABEL: @test90(
; CHECK: ret <2 x i32> <i32 0, i32 15360>
%tmp6 = bitcast <4 x half> <half undef, half undef, half undef, half 0xH3C00> to <2 x i32>
ret <2 x i32> %tmp6
}