https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92578
Bug ID: 92578
Summary: [i386] cmov not generated
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: crazylht at gmail dot com
CC: hjl.tools at gmail dot com
Target Milestone: ---
Cat test.c
int foo(int moves, int movecnt, int komove) {
int newcnt = movecnt;
if (moves == komove)
newcnt--;
return newcnt;
}
gcc10 -O2 test.c -S
cmpl %edx, %edi
movl %esi, %eax
sete %dl
movzbl %dl, %edx
subl %edx, %eax
ret
It could be better like
cmpl %edx, %edi #6.12
lea -1(%rsi), %eax #5.9
cmovne %esi, %eax #6.12
ret
Just like icc did, refer to https://godbolt.org/z/6mqkt8
