D23857.id68909.diff
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	Index: head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
	===================================================================
	--- head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
	+++ head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
	@@ -185,6 +185,9 @@
	setOperationAction(ISD::READCYCLECOUNTER, MVT::i64,
	Subtarget.is64Bit() ? Legal : Custom);

	+ setOperationAction(ISD::TRAP, MVT::Other, Legal);
	+ setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal);
	+
	if (Subtarget.hasStdExtA()) {
	setMaxAtomicSizeInBitsSupported(Subtarget.getXLen());
	setMinCmpXchgSizeInBits(32);
	Index: head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfo.td
	===================================================================
	--- head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfo.td
	+++ head/contrib/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfo.td
	@@ -1075,6 +1075,16 @@
	mayLoad = 0, mayStore = 0, hasNoSchedulingInfo = 1 in
	def ReadCycleWide : Pseudo<(outs GPR:$lo, GPR:$hi), (ins), [], "", "">;

	+/// traps
	+
	+// We lower `trap` to `unimp`, as this causes a hard exception on nearly all
	+// systems.
	+def : Pat<(trap), (UNIMP)>;
	+
	+// We lower `debugtrap` to `ebreak`, as this will get the attention of the
	+// debugger if possible.
	+def : Pat<(debugtrap), (EBREAK)>;
	+
	//===----------------------------------------------------------------------===//
	// Standard extensions
	//===----------------------------------------------------------------------===//