[Bug tree-optimization/88842] missing optimization CSE, reassociation
luoxhu at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Fri May 15 03:25:54 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88842
luoxhu at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |luoxhu at gcc dot gnu.org
--- Comment #3 from luoxhu at gcc dot gnu.org ---
One more case of missed optimization CSE, reassoc:
void foo(unsigned int a, unsigned int b, unsigned int c, unsigned int d, int
*res1, int*res2, int *res3)
{
*res1 = a + b + c + d;
*res2 = b + c;
*res3 = a + d;
}
cat foo.s
.file "foo.c"
.machine power8
.abiversion 2
.section ".text"
.align 2
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
add 10,5,6
add 10,10,4
add 4,4,5
add 10,10,3
add 3,3,6
stw 10,0(7)
stw 4,0(8)
stw 3,0(9)
blr
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