[libc-commits] [clang] [compiler-rt] [llvm] [lld] [libc] [flang] [libcxx] Fix ISel crash when lowering BUILD_VECTOR (PR #73186)
Simon Pilgrim via libc-commits
libc-commits at lists.llvm.org
Thu Nov 23 04:53:57 PST 2023
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@@ -7254,6 +7255,10 @@ static SDValue lowerBuildVectorAsBroadcast(BuildVectorSDNode *BVOp,
EVT CVT = Ld.getValueType();
assert(!CVT.isVector() && "Must not broadcast a vector type");
+ // 512 bit vpbroadcastw is only available with AVX512BW
+ if (ScalarSize == 16 && IsGT256 && !Subtarget.hasBWI())
+ return SDValue();
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RKSimon wrote:
Isn't X86DAGToDAGISel::PreprocessISelDAG() is supposed to handle this?
https://github.com/llvm/llvm-project/pull/73186
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