https://sourceware.org/bugzilla/show_bug.cgi?id=34143
Bug ID: 34143
Summary: cpu_flags_from_attr is expensive
Product: binutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: andi-bz at firstfloor dot org
Target Milestone: ---
On x86 / skylake
Perhaps this should be cached?
awk 'BEGIN { for (i = 0; i < 10000000; i++) { print " mov %eax,%eax" } } ' | as
17.75% as-new as-new [.] match_template
|
--17.43%--match_template
md_assemble
read_a_source_file
main
__libc_start_call_main
__libc_start_main@@GLIBC_2.34
_start
11.50% as-new as-new [.] cpu_flags_from_attr
|
---cpu_flags_from_attr
|
|--10.29%--cpu_flags_match
| |
| |--6.21%--match_template
| | md_assemble
| | read_a_source_file
| | main
| | __libc_start_call_main
| | __libc_start_main@@GLIBC_2.34
| | _start
| |
| --4.08%--parse_insn
| md_assemble
| read_a_source_file
| main
| __libc_start_call_main
| __libc_start_main@@GLIBC_2.34
| _start
|
--1.21%--check_VecOperands
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