https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66845
Bug ID: 66845
Summary: one more %si register function clobbering issue
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marcus at jet dot franken.de
Target Milestone: ---
bug 66782 fixes one %si clobbering issues when transitioning between win64 and
sysv ABI.
Here is the next one.
RPCRT4_strndupA is a SysV ABI static function taking 2 arguments, second is -1
-1 is stored in %esi before the first call, but somehow assumed to be live in
the second call too, while it is being clobbered in the function.
6d: be ff ff ff ff mov $0xffffffff,%esi
72: 48 8b 3b mov (%rbx),%rdi
75: e8 00 00 00 00 callq 7a <RpcBindingCopy+0x7a>
76: R_X86_64_PC32 RPCRT4_strndupA-0x4
7a: 48 8b 7b 08 mov 0x8(%rbx),%rdi
7e: e8 00 00 00 00 callq 83 <RpcBindingCopy+0x83>
7f: R_X86_64_PC32 RPCRT4_strndupA-0x4
