[Bug middle-end/91174] New: Suboptimal code for arithmetic with bool
antoshkka at gmail dot com
gcc-bugzilla@gcc.gnu.org
Mon Jul 15 14:28:00 GMT 2019
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91174
Bug ID: 91174
Summary: Suboptimal code for arithmetic with bool
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: antoshkka at gmail dot com
Target Milestone: ---
Consider the example:
int test (bool x) {
return '0' + x;
}
For the above snippet the following suboptimal assembly is generated:
test(bool):
movzx eax, dil
add eax, 48
ret
More efficient assembly would be:
test(bool):
lea eax, [rdi + 48]
ret
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