RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-26 12:43:36 +01:00
Code Issues Projects Releases Wiki Activity

[SVE] Fix incorrect usage of getNumElements() in InstCombineCalls

Browse Source 
Summary:
Remove incorrect usage of getNumElements() from visitCallInst(). The
number of elements was being used to construct a DemandedElts bitfield.
This operation does not make sense for scalable vectors. Cast to
FixedVectorType

Identified by test case Clang :: CodeGen/aarch64-sve-intrinsics/acle_sve_mla.c

Reviewers: rengolin, efriedma, sdesmalen, c-rhodes, david-arm

Reviewed By: david-arm

Subscribers: tschuett, kristof.beyls, hiraditya, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79524
This commit is contained in:
Christopher Tetreault 2020-05-07 08:34:55 -07:00
parent 292877948a
commit 5ac1d35e81
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
lib/Transforms/InstCombine/InstCombineCalls.cpp
View File

@ -1942,9 +1942,10 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
if (Changed) return II;
}
// For vector result intrinsics, use the generic demanded vector support.
if (auto *IIVTy = dyn_cast<VectorType>(II->getType())) {
auto VWidth = IIVTy->getNumElements();
// For fixed width vector result intrinsics, use the generic demanded vector
// support.
if (auto *IIFVTy = dyn_cast<FixedVectorType>(II->getType())) {
auto VWidth = IIFVTy->getNumElements();
APInt UndefElts(VWidth, 0);
APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth));
if (Value *V = SimplifyDemandedVectorElts(II, AllOnesEltMask, UndefElts)) {