https://bugs.llvm.org/show_bug.cgi?id=51755
Bug ID: 51755
Summary: Missing memmove detection with non constant size
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
void missing_memmove_unsigned (unsigned N, char *a)
{
unsigned j = N;
while (j > 0) {
a[j] = a[j - 1];
--j;
}
}
void missing_memmove_signed(int N, char *a)
{
int j;
for (j = N; j > 0; j--)
a[j] = a[j - 1];
}
GCC can emit memmove missing_memmove_signed.
https://godbolt.org/z/noTn15Ejc
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