[RISCV] Correct the error location for the X26 check in parseRegListCommon.

We should point to the start of the reglist not the closing parenthesis.

I also moved the check after we finishing parsing the closing brace.
The diagnostic mentions '{ra, s0-s10} or {x1, x8-x9, x18-x26}' so we
should be sure that's what we parsed.

Author: topperc

llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp

@@ -2655,13 +2655,13 @@ ParseStatus RISCVAsmParser::parseRegListCommon(OperandVector &Operands,
     }
   }
 
-  if (RegEnd == RISCV::X26)
-    return Error(getLoc(), "invalid register list, {ra, s0-s10} or {x1, x8-x9, "
-                           "x18-x26} is not supported");
-
   if (parseToken(AsmToken::RCurly, "register list must end with '}'"))
     return ParseStatus::Failure;
 
+  if (RegEnd == RISCV::X26)
+    return Error(S, "invalid register list, {ra, s0-s10} or {x1, x8-x9, "
+                    "x18-x26} is not supported");
+
   auto Encode = RISCVZC::encodeRlist(RegEnd, IsRVE);
   assert(Encode != RISCVZC::INVALID_RLIST);
   if (MustIncludeS0)

llvm/test/MC/RISCV/rv32xqccmp-invalid.s

@@ -10,7 +10,7 @@ qc.cm.mvsa01 s0, s0
 # CHECK-ERROR: :[[@LINE+1]]:14: error: invalid operand for instruction
 qc.cm.mva01s a1, a2
 
-# CHECK-ERROR: :[[@LINE+1]]:26: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
+# CHECK-ERROR: :[[@LINE+1]]:15: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
 qc.cm.popretz {ra, s0-s10}, 112
 
 # CHECK-ERROR: :[[@LINE+1]]:28: error: stack adjustment for register list must be a multiple of 16 bytes in the range [16, 64]

llvm/test/MC/RISCV/rv32zcmp-invalid.s

@@ -10,7 +10,7 @@ cm.mvsa01 s0, s0
 # CHECK-ERROR: :[[@LINE+1]]:11: error: invalid operand for instruction
 cm.mva01s a1, a2
 
-# CHECK-ERROR: :[[@LINE+1]]:23: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
+# CHECK-ERROR: :[[@LINE+1]]:12: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
 cm.popretz {ra, s0-s10}, 112
 
 # CHECK-ERROR: :[[@LINE+1]]:25: error: stack adjustment for register list must be a multiple of 16 bytes in the range [16, 64]

llvm/test/MC/RISCV/rv64xqccmp-invalid.s

@@ -10,7 +10,7 @@ qc.cm.mvsa01 s0, s0
 # CHECK-ERROR: :[[@LINE+1]]:14: error: invalid operand for instruction
 qc.cm.mva01s a1, a2
 
-# CHECK-ERROR: :[[@LINE+1]]:26: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
+# CHECK-ERROR: :[[@LINE+1]]:15: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
 qc.cm.popretz {ra, s0-s10}, 112
 
 # CHECK-ERROR: :[[@LINE+1]]:28: error: stack adjustment for register list must be a multiple of 16 bytes in the range [32, 80]

llvm/test/MC/RISCV/rv64zcmp-invalid.s

@@ -10,7 +10,7 @@ cm.mvsa01 s0, s0
 # CHECK-ERROR: :[[@LINE+1]]:11: error: invalid operand for instruction
 cm.mva01s a1, a2
 
-# CHECK-ERROR: :[[@LINE+1]]:23: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
+# CHECK-ERROR: :[[@LINE+1]]:12: error: invalid register list, {ra, s0-s10} or {x1, x8-x9, x18-x26} is not supported
 cm.popretz {ra, s0-s10}, 112
 
 # CHECK-ERROR: :[[@LINE+1]]:25: error: stack adjustment for register list must be a multiple of 16 bytes in the range [32, 80]