[RISCV] Add support for RVC HINT instructions
The hint instructions are enabled by default (if the standard C extension is
enabled). To disable them pass -mattr=-rvc-hints.
Differential Revision: https://reviews.llvm.org/D62592
llvm-svn: 369528
diff --git a/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp b/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
index 55ce2e4..9605444 100644
--- a/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
+++ b/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
@@ -864,6 +864,10 @@
return generateImmOutOfRangeError(Operands, ErrorInfo,
std::numeric_limits<int32_t>::min(),
std::numeric_limits<uint32_t>::max());
+ case Match_InvalidImmZero: {
+ SMLoc ErrorLoc = ((RISCVOperand &)*Operands[ErrorInfo]).getStartLoc();
+ return Error(ErrorLoc, "immediate must be zero");
+ }
case Match_InvalidUImmLog2XLen:
if (isRV64())
return generateImmOutOfRangeError(Operands, ErrorInfo, 0, (1 << 6) - 1);