http://llvm.org/bugs/show_bug.cgi?id=15964
Bug ID: 15964
Summary: Missing conditional optimization compared to gcc
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Global Analyses
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The following two programs give the same result with gcc but B produces worse
code with clang.
A:
int
PL_strcasecmp(const char *a, const char *b)
{
while( (*a == *b) && ('\0' != *a))
{
a++;
b++;
}
return *a - *b;
}
B:
int
PL_strcasecmp(const char *a, const char *b)
{
while( (*a == *b) && ('\0' != *a) && ('\0' != *b))
{
a++;
b++;
}
return *a - *b;
}
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