https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89859
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*
Status|UNCONFIRMED |RESOLVED
Component|c++ |middle-end
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
_ZN4test7computeEPi.isra.0: // non-restrict
.LFB2:
.cfi_startproc
ldr x3, [x0]
mov w4, 99
ldr w2, [x0, 8]
add w2, w2, w1
str w2, [x0, 8]
strb w4, [x3]
ldr w2, [x0, 8]
add w1, w2, w1
str w1, [x0, 8]
ret
_ZN4test7computeEPi.isra.0: // restrict
.LFB2:
.cfi_startproc
ldr x3, [x0]
mov w4, 99
ldr w2, [x0, 8]
strb w4, [x3]
add w1, w2, w1, lsl 1
str w1, [x0, 8]
ret
// Actually it is not worse, there is one less load; just it looks worse due to
CISC notion of x86_64.
See above for AARCH64 assembly to show that is the story.
