https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104645
Bug ID: 104645
Summary: [12 Regression] i ? i % 2 : 0 not optimized anymore
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: denis.campredon at gmail dot com
Target Milestone: ---
Was told to file a new PR for that case :
------------------
int foo(unsigned i) {
return i ? i % 2 : 0;
}
------------------
With trunk
------------------------
foo(unsigned int):
mov eax, edi
xor edx, edx
and eax, 1
test edi, edi
cmove eax, edx
ret
-----------------------
With 11.2
-----------------------
foo(unsigned int):
mov eax, edi
and eax, 1
ret
-----------------------
According to Jakub Jelinek in PR104639 it started with
r12-5358-g32221357007666124409ec3ee0d3a1cf263ebc9e
