[X86] Move all the FP_TO_XINT/XINT_TO_FP setOperationActions into the same !useSoftFloat block. Qualify all of the Promote actions for these with !useSoftFloat too. NFCI

The Promote action doesn't apply until LegalizeDAG. By the time
we get there, we would have already softened all the FP operations
if useSoftFloat was true. So there wouldn't be any operation left
to Promote.

Author: topperc

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -223,56 +223,43 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
       setOperationAction(ShiftOp           , MVT::i64  , Custom);
   }
 
-  // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
-  // operation.
-  setOperationAction(ISD::UINT_TO_FP       , MVT::i8   , Promote);
-  setOperationAction(ISD::UINT_TO_FP       , MVT::i16  , Promote);
-
   if (!Subtarget.useSoftFloat()) {
-    // We have an algorithm for SSE2->double, and we turn this into a
-    // 64-bit FILD followed by conditional FADD for other targets.
-    setOperationAction(ISD::UINT_TO_FP     , MVT::i64  , Custom);
+    // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
+    // operation.
+    setOperationAction(ISD::UINT_TO_FP, MVT::i8,  Promote);
+    setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote);
     // We have an algorithm for SSE2, and we turn this into a 64-bit
     // FILD or VCVTUSI2SS/SD for other targets.
-    setOperationAction(ISD::UINT_TO_FP     , MVT::i32  , Custom);
-  }
-
-  // Promote i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
-  // this operation.
-  setOperationAction(ISD::SINT_TO_FP       , MVT::i8   , Promote);
+    setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
+    // We have an algorithm for SSE2->double, and we turn this into a
+    // 64-bit FILD followed by conditional FADD for other targets.
+    setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
 
-  if (!Subtarget.useSoftFloat()) {
+    // Promote i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
+    // this operation.
+    setOperationAction(ISD::SINT_TO_FP, MVT::i8,  Promote);
     // SSE has no i16 to fp conversion, only i32.
-    if (X86ScalarSSEf32) {
-      setOperationAction(ISD::SINT_TO_FP     , MVT::i16  , Promote);
-      // f32 and f64 cases are Legal, f80 case is not
-      setOperationAction(ISD::SINT_TO_FP     , MVT::i32  , Custom);
-    } else {
-      setOperationAction(ISD::SINT_TO_FP     , MVT::i16  , Custom);
-      setOperationAction(ISD::SINT_TO_FP     , MVT::i32  , Custom);
-    }
-  }
-
-  // Promote i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
-  // this operation.
-  setOperationAction(ISD::FP_TO_SINT       , MVT::i8   , Promote);
-
-  if (!Subtarget.useSoftFloat()) {
+    setOperationAction(ISD::SINT_TO_FP, MVT::i16, X86ScalarSSEf32 ? Promote
+                                                                  : Custom);
+    // f32 and f64 cases are Legal with SSE1/SSE2, f80 case is not
+    setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
     // In 32-bit mode these are custom lowered.  In 64-bit mode F32 and F64
     // are Legal, f80 is custom lowered.
-    setOperationAction(ISD::FP_TO_SINT     , MVT::i64  , Custom);
-    setOperationAction(ISD::SINT_TO_FP     , MVT::i64  , Custom);
+    setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
 
-    setOperationAction(ISD::FP_TO_SINT     , MVT::i16  , Custom);
-    setOperationAction(ISD::FP_TO_SINT     , MVT::i32  , Custom);
-  }
-
-  // Handle FP_TO_UINT by promoting the destination to a larger signed
-  // conversion.
-  setOperationAction(ISD::FP_TO_UINT       , MVT::i8   , Promote);
-  setOperationAction(ISD::FP_TO_UINT       , MVT::i16  , Promote);
+    // Promote i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
+    // this operation.
+    setOperationAction(ISD::FP_TO_SINT, MVT::i8,  Promote);
+    setOperationAction(ISD::FP_TO_SINT, MVT::i16, Custom);
+    setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
+    // In 32-bit mode these are custom lowered.  In 64-bit mode F32 and F64
+    // are Legal, f80 is custom lowered.
+    setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
 
-  if (!Subtarget.useSoftFloat()) {
+    // Handle FP_TO_UINT by promoting the destination to a larger signed
+    // conversion.
+    setOperationAction(ISD::FP_TO_UINT, MVT::i8,  Promote);
+    setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote);
     setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
     setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
   }