http://llvm.org/bugs/show_bug.cgi?id=10287
Summary: Unnecessary testl
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
given
double foobar(double x, int y) {
unsigned n = y;
double p = 1;
while (true) {
n >>= 1;
if (n == 0)
return p;
}
}
gcc produces:
__Z6foobardi:
shrl %edi
jne __Z6foobardi
movsd 0x00000004(%rip),%xmm0
re
clang produces:
__Z6foobardi:
shrl %edi
testl %edi,%edi
jne __Z6foobardi
movsd 0x00000002(%rip),%xmm0
ret
--
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
