[llvm] [RISCV][GlobalIsel] Reduce constant pool usage without FP extension (PR #158346)

[Craig Topper via llvm-commits]

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@@ -219,6 +220,10 @@ RISCVRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
   const TargetSubtargetInfo &STI = MF.getSubtarget();
   const TargetRegisterInfo &TRI = *STI.getRegisterInfo();
 
+  bool HasFPExt = STI.hasFeature(RISCV::FeatureStdExtF) ||
+                  STI.hasFeature(RISCV::FeatureStdExtD) ||
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topperc wrote:

FeatureStdExtD and FeatureStdExtZfh both implies StdExtF. You don't need to check all 3.

https://github.com/llvm/llvm-project/pull/158346