[llvm] [RISCV] Set isTrap for EBREAK and UNIMP (PR #131636)

[Craig Topper via llvm-commits]

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@@ -762,6 +763,7 @@ def EBREAK : RVInstI<0b000, OPC_SYSTEM, (outs), (ins), "ebreak", "">,
 // This is a de facto standard (as set by GNU binutils) 32-bit unimplemented
 // instruction (i.e., it should always trap, if your implementation has invalid
 // instruction traps).
+let isTrap = 1 in
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topperc wrote:

Should we do C_UNIMP too?

https://github.com/llvm/llvm-project/pull/131636