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* [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math
[not found] <bug-84997-4@http.gcc.gnu.org/bugzilla/>
@ 2021-07-24 9:41 ` pinskia at gcc dot gnu.org
2023-08-05 3:28 ` [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math but with -fno-trapping-math pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-24 9:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84997
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Component|middle-end |tree-optimization
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math but with -fno-trapping-math
[not found] <bug-84997-4@http.gcc.gnu.org/bugzilla/>
2021-07-24 9:41 ` [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math pinskia at gcc dot gnu.org
@ 2023-08-05 3:28 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-05 3:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84997
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Optimize integer operations |Optimize integer operations
|on floating point constants |on floating point constants
|without -ffast-math |without -ffast-math but
| |with -fno-trapping-math
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>clang optimizes to the following assembly
Note clang defaults to -fno-trapping-math.
Using -ftrapping-math with clang produces what GCC produces currently:
cvtsi2sd %edi, %xmm0
addsd .LCPI0_0(%rip), %xmm0
cvttsd2si %xmm0, %eax
retq
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-84997-4@http.gcc.gnu.org/bugzilla/>
2021-07-24 9:41 ` [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math pinskia at gcc dot gnu.org
2023-08-05 3:28 ` [Bug tree-optimization/84997] Optimize integer operations on floating point constants without -ffast-math but with -fno-trapping-math pinskia at gcc dot gnu.org
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