https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110318
Bug ID: 110318
Summary: Unused string literal is retained in assembler file
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
~~~c
typedef typeof(sizeof 0) size_t;
int memcmp(const void *, const void *, size_t);
int demo(const char *);
int demo(const char *p) {
const char *start = p;
while (*p == 'C')
p++;
if (p - start == 2 && memcmp(start, "if", 2) == 0)
return 2;
if (p - start == 6 && memcmp(start, "ifndef", 6) == 0)
return 6;
return 0;
}
~~~
$ uname -a
NetBSD nbcurr.roland-illig.de 10.99.3 NetBSD 10.99.3 (GENERIC) #0: Fri Apr 21
02:17:32 UTC 2023
$ gcc-12.2.0 -O2 -S code.c
$ grep string code.s
.string "ifndef"
The string "ifndef" is retained, even though it is not used in the code,
because the comparison is inlined. Curiously, the string "if" is removed.
Both strings should be removed, as they are unnecessary.
