A simple replacement of atoi() with strtol() in
varasm.cc:decode_reg_name_and_count().
Parsing now has errno ERANGE checking, eg no undetected overflow.
Being new it is difficult for me to come up with a good test case.
---
diff --git a/gcc/varasm.cc b/gcc/varasm.cc
index acc4b4a0419..d3c60eaf4d6 100644
--- a/gcc/varasm.cc
+++ b/gcc/varasm.cc
@@ -993,8 +993,11 @@ decode_reg_name_and_count (const char *asmspec, int
*pnregs)
break;
if (asmspec[0] != 0 && i < 0)
{
- i = atoi (asmspec);
- if (i < FIRST_PSEUDO_REGISTER && i >= 0 && reg_names[i][0])
+ char *pend{};
+ errno = 0;
+ i = strtol (asmspec, &pend, 10);
+ if (errno != ERANGE
+ && i < FIRST_PSEUDO_REGISTER && i >= 0 && reg_names[i][0])
return i;
else
return -2;
