[Bug tree-optimization/126693] Fold abs (x) * abs (y) -> abs (x * y)
"dipesh.sharma at amd dot com via Gcc-bugs" <[email protected]>
| Newsgroups | gmane.comp.gcc.bugs |
|---|---|
| Message-ID | <[email protected]/bugzilla/> |
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126693
Dipesh Sharma <dipesh.sharma at amd dot com> changed:
What |Removed |Added
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CC| |dipesh.sharma at amd dot com
--- Comment #2 from Dipesh Sharma <dipesh.sharma at amd dot com> ---
I believe it is valid, GCC is generating two abs and mul.
I tested with -Ofast, -O3, -O0 and -frounding-math. Below is the generated
assembly.
"f":
andpd xmm0, XMMWORD PTR .LC0[rip]
andpd xmm1, XMMWORD PTR .LC0[rip]
mulsd xmm0, xmm1
ret
.LC0:
.long -1
.long 2147483647
.long 0
.long 0
Can I take this up ?