Do away with addLegalFPImmediate. Add a target hook isFPImmLegal which returns true if the fp immediate can be natively codegened by target.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85281 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index b3f865c..b2b738d 100644
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -157,11 +157,6 @@
setStackPointerRegisterToSaveRestore(Alpha::R30);
- addLegalFPImmediate(APFloat(+0.0)); //F31
- addLegalFPImmediate(APFloat(+0.0f)); //F31
- addLegalFPImmediate(APFloat(-0.0)); //-F31
- addLegalFPImmediate(APFloat(-0.0f)); //-F31
-
setJumpBufSize(272);
setJumpBufAlignment(16);
@@ -919,3 +914,11 @@
// The Alpha target isn't yet aware of offsets.
return false;
}
+
+bool AlphaTargetLowering::isFPImmLegal(const APFloat &Imm) const {
+ // +0.0 F31
+ // +0.0f F31
+ // -0.0 -F31
+ // -0.0f -F31
+ return Imm.isZero() || Imm.isNegZero();
+}
diff --git a/lib/Target/Alpha/AlphaISelLowering.h b/lib/Target/Alpha/AlphaISelLowering.h
index b580c9d..fbffbed 100644
--- a/lib/Target/Alpha/AlphaISelLowering.h
+++ b/lib/Target/Alpha/AlphaISelLowering.h
@@ -102,6 +102,11 @@
/// getFunctionAlignment - Return the Log2 alignment of this function.
virtual unsigned getFunctionAlignment(const Function *F) const;
+ /// isFPImmLegal - Returns true if the target can instruction select the
+ /// specified FP immediate natively. If false, the legalizer will
+ /// materialize the FP immediate as a load from a constant pool.
+ virtual bool isFPImmLegal(const APFloat &Imm) const;
+
private:
// Helpers for custom lowering.
void LowerVAARG(SDNode *N, SDValue &Chain, SDValue &DataPtr,