[RISCV][NFC] Simplify ISD::SELECT Legality #142650
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ISD::SELECT is legal by default, so this change to the conditional makes it clearer that XTHeadCondMov and XMipsCMove both leave this operation legal rather than custom expanding it.
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@llvm/pr-subscribers-backend-risc-v Author: Sam Elliott (lenary) ChangesISD::SELECT is legal by default, so this change to the conditional makes it clearer that XTHeadCondMov and XMipsCMove both leave this operation legal rather than custom expanding it. Full diff: https://github.com/llvm/llvm-project/pull/142650.diff 1 Files Affected:
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 6e8e4ac1c6a95..6158e51346d77 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -434,9 +434,7 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
setOperationAction(ISD::ABS, MVT::i32, Custom);
}
- if (Subtarget.useCCMovInsn())
- setOperationAction(ISD::SELECT, XLenVT, Legal);
- else if (!Subtarget.hasVendorXTHeadCondMov())
+ if (!Subtarget.useCCMovInsn() && !Subtarget.hasVendorXTHeadCondMov())
setOperationAction(ISD::SELECT, XLenVT, Custom);
if (Subtarget.hasVendorXqcia() && !Subtarget.is64Bit()) {
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ISD::SELECT is legal by default, so this change to the conditional makes it clearer that XTHeadCondMov and XMipsCMove both leave this operation legal rather than custom expanding it.