[LLVMbugs] [Bug 2114] New: LLVM returns vector in mm0 register on X86, llvm-gcc uses ax:dx
bugzilla-daemon at cs.uiuc.edu
bugzilla-daemon at cs.uiuc.edu
Fri Feb 29 22:05:24 PST 2008
http://llvm.org/bugs/show_bug.cgi?id=2114
Summary: LLVM returns vector in mm0 register on X86, llvm-gcc
uses ax:dx
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: unassignedbugs at nondot.org
ReportedBy: andersca at mac.com
CC: llvmbugs at cs.uiuc.edu
The following code
__m64 f()
{
return (__m64){0L};
}
is compiled by llvm-gcc to
pxor %mm0, %mm0
ret
whereas gcc compiles it to
pushl %ebp
xorl %eax, %eax
movl %esp, %ebp
subl $8, %esp
leave
xorl %edx, %edx
ret
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