https://bugs.llvm.org/show_bug.cgi?id=47024
Bug ID: 47024
Summary: Use xor esi, esi instead of mov esi, 0
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: david.bolvan...@gmail.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, spatel+l...@rotateright.com
struct data_t {
char data[16];
};
void process3(data_t, data_t, data_t);
void test() {
process3({1, 2, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{11, 12, 13, 14, 15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
{21, 22, 23, 24, 25, 20, 20, 20, 10, 20, 20, 20, 20, 20, 20, 11});
}
test(): # @test()
movabs rdi, 21542142465
movabs rdx, 723401749922909195
movabs rcx, 723401728380766730
movabs r8, 1446803478303675925
movabs r9, 798285110420182026
mov esi, 0
jmp process3(data_t, data_t, data_t) # TAILCALL
https://godbolt.org/z/n1hbv8
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