[PATCH] D128644: [RISCV] Fix the problem of parsing long version numbers

[Shao-Ce SUN via Phabricator via llvm-commits]

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For example, when parsing Zbpbo0p911, an error will be reported: 
"multi-character extensions must be separated by underscores"


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128644

Files:
  llvm/lib/Support/RISCVISAInfo.cpp


Index: llvm/lib/Support/RISCVISAInfo.cpp
===================================================================
--- llvm/lib/Support/RISCVISAInfo.cpp
+++ llvm/lib/Support/RISCVISAInfo.cpp
@@ -348,7 +348,7 @@
 
   if (!MajorStr.empty() && In.consume_front("p")) {
     MinorStr = In.take_while(isDigit);
-    In = In.substr(MajorStr.size() + 1);
+    In = In.substr(MajorStr.size() + MinorStr.size() - 1);
 
     // Expected 'p' to be followed by minor version number.
     if (MinorStr.empty()) {


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