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| author | Yingwei Zheng <dtcxzyw2333@gmail.com> | 2025-02-25 22:03:17 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-02-25 22:03:17 +0800 |
| commit | 44d1dbd24c20a0ee93063dcf44d68e2b8f0bf77c (patch) | |
| tree | 1057e960ffce2a0d813ee3ae519ff7235560926f /llvm/lib/CodeGen | |
| parent | d21b2e619a5e23fd2f4cb05f5929990ee517d164 (diff) | |
| download | llvm-44d1dbd24c20a0ee93063dcf44d68e2b8f0bf77c.zip llvm-44d1dbd24c20a0ee93063dcf44d68e2b8f0bf77c.tar.gz llvm-44d1dbd24c20a0ee93063dcf44d68e2b8f0bf77c.tar.bz2 | |
[X86][DAGCombiner] Skip x87 fp80 values in `combineFMulOrFDivWithIntPow2` (#128618)
f80 is not a valid IEEE floating-point type.
Closes https://github.com/llvm/llvm-project/issues/128528.
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index a83be13..6746a5d 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -17271,6 +17271,9 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) { // prefer it. SDValue DAGCombiner::combineFMulOrFDivWithIntPow2(SDNode *N) { EVT VT = N->getValueType(0); + if (!APFloat::isIEEELikeFP(VT.getFltSemantics())) + return SDValue(); + SDValue ConstOp, Pow2Op; std::optional<int> Mantissa; @@ -17297,8 +17300,8 @@ SDValue DAGCombiner::combineFMulOrFDivWithIntPow2(SDNode *N) { const APFloat &APF = CFP->getValueAPF(); - // Make sure we have normal/ieee constant. - if (!APF.isNormal() || !APF.isIEEE()) + // Make sure we have normal constant. + if (!APF.isNormal()) return false; // Make sure the floats exponent is within the bounds that this transform |