X86: Support FCANONICALIZE on f64/f80 for i686 with SSE2 or AVX (#123917)

Currently, FCANONICALIZE is not enabled for f64 with SSE2,
and is not enabled for f80 for 32bit system.
Let's enable them.

Author: wzssyqa

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -334,10 +334,10 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
       setOperationAction(ISD::FP_TO_SINT_SAT, VT, Custom);
     }
     setOperationAction(ISD::FCANONICALIZE, MVT::f32, Custom);
+    setOperationAction(ISD::FCANONICALIZE, MVT::f64, Custom);
     if (Subtarget.is64Bit()) {
       setOperationAction(ISD::FP_TO_UINT_SAT, MVT::i64, Custom);
       setOperationAction(ISD::FP_TO_SINT_SAT, MVT::i64, Custom);
-      setOperationAction(ISD::FCANONICALIZE, MVT::f64, Custom);
     }
   }
   if (Subtarget.hasAVX10_2()) {
@@ -367,7 +367,6 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
     setOperationAction(ISD::BITCAST        , MVT::f32  , Expand);
     setOperationAction(ISD::BITCAST        , MVT::i32  , Expand);
     setOperationAction(ISD::FCANONICALIZE, MVT::f32, Custom);
-    setOperationAction(ISD::FCANONICALIZE, MVT::f80, Custom);
     setOperationAction(ISD::FCANONICALIZE, MVT::f64, Custom);
     if (Subtarget.is64Bit()) {
       setOperationAction(ISD::BITCAST      , MVT::f64  , Expand);
@@ -889,6 +888,7 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
     setOperationAction(ISD::STRICT_FMUL     , MVT::f80, Legal);
     setOperationAction(ISD::STRICT_FDIV     , MVT::f80, Legal);
     setOperationAction(ISD::STRICT_FSQRT    , MVT::f80, Legal);
+    setOperationAction(ISD::FCANONICALIZE   , MVT::f80, Custom);
     if (isTypeLegal(MVT::f16)) {
       setOperationAction(ISD::FP_EXTEND, MVT::f80, Custom);
       setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f80, Custom);