Check no SoftFloat

phoebewang · phoebewang · commit c8709dd4643f · 2025-02-10T11:03:01.000+08:00
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -53919,7 +53919,7 @@ static SDValue combineTruncate(SDNode *N, SelectionDAG &DAG,
       return DAG.getNode(X86ISD::MMX_MOVD2W, DL, MVT::i32, BCSrc);
   }
 
-  if (N->getFlags().hasNoSignedWrap() &&
+  if (!Subtarget.useSoftFloat() && N->getFlags().hasNoSignedWrap() &&
       (Src.getOpcode() == ISD::LRINT || Src.getOpcode() == ISD::LLRINT) &&
       VT.getScalarType() == MVT::i32 && Src.hasOneUse())
     return DAG.getNode(ISD::LRINT, DL, VT, Src.getOperand(0));

Original file line number	Diff line number	Diff line change
`@@ -53919,7 +53919,7 @@ static SDValue combineTruncate(SDNode *N, SelectionDAG &DAG,`
`53919`	`53919`	`return DAG.getNode(X86ISD::MMX_MOVD2W, DL, MVT::i32, BCSrc);`
`53920`	`53920`	`}`
`53921`	`53921`
`53922`		`- if (N->getFlags().hasNoSignedWrap() &&`
	`53922`	`+ if (!Subtarget.useSoftFloat() && N->getFlags().hasNoSignedWrap() &&`
`53923`	`53923`	`(Src.getOpcode() == ISD::LRINT \|\| Src.getOpcode() == ISD::LLRINT) &&`
`53924`	`53924`	`VT.getScalarType() == MVT::i32 && Src.hasOneUse())`
`53925`	`53925`	`return DAG.getNode(ISD::LRINT, DL, VT, Src.getOperand(0));`