[X86] Reject fpsr in inline asm constraints other than clobber.

Fixes #73197 and #69201.
llvm · Nov 23, 2023 · e99ee06 · e99ee06
1 parent b16f765
commit e99ee06
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -57236,7 +57236,8 @@ X86TargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
       return std::make_pair(X86::DF, &X86::DFCCRRegClass);
 
     // fpsr -> FPSW
-    if (StringRef("{fpsr}").equals_insensitive(Constraint))
+    // Only allow for clobber.
+    if (StringRef("{fpsr}").equals_insensitive(Constraint) && VT == MVT::Other)
       return std::make_pair(X86::FPSW, &X86::FPCCRRegClass);
 
     return Res;