Change how FP immediates are handled.
1) ConstantFP is now expand by default
2) ConstantFP is not turned into TargetConstantFP during Legalize
if it is legal.
This allows ConstantFP to be handled like Constant, allowing for
targets that can encode FP immediates as MachineOperands.
As a bonus, fix up Itanium FP constants, which now correctly match,
and match more constants! Hooray.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47121 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 7bfb302..e2c3ae0 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -353,8 +353,6 @@
// Expand FP immediates into loads from the stack, except for the special
// cases we handle.
- setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
- setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
addLegalFPImmediate(APFloat(+0.0)); // xorpd
addLegalFPImmediate(APFloat(+0.0f)); // xorps
@@ -390,10 +388,7 @@
setOperationAction(ISD::FCOS , MVT::f32, Expand);
setOperationAction(ISD::FREM , MVT::f32, Expand);
- // Expand FP immediates into loads from the stack, except for the special
- // cases we handle.
- setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
- setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
+ // Special cases we handle for FP constants.
addLegalFPImmediate(APFloat(+0.0f)); // xorps
addLegalFPImmediate(APFloat(+0.0)); // FLD0
addLegalFPImmediate(APFloat(+1.0)); // FLD1
@@ -440,9 +435,6 @@
setOperationAction(ISD::FSIN , MVT::f64 , Expand);
setOperationAction(ISD::FCOS , MVT::f64 , Expand);
}
-
- setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
- setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
addLegalFPImmediate(APFloat(+0.0)); // FLD0
addLegalFPImmediate(APFloat(+1.0)); // FLD1
addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
@@ -458,7 +450,6 @@
setOperationAction(ISD::UNDEF, MVT::f80, Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
{
- setOperationAction(ISD::ConstantFP, MVT::f80, Expand);
APFloat TmpFlt(+0.0);
TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
addLegalFPImmediate(TmpFlt); // FLD0