Hi,
I try ARM, MIPS, PowerPC and X86 on povray benchmark. No one can
shrink-wrap function Ray_In_Bound.
Here is:
bool Ray_In_Bound (RAY *Ray, OBJECT *Bounding_Object)
{
...
for (Bound = Bounding_Object; Bound != NULL; Bound = Bound->Sibling)
{...}
return (true);
}
For ARM O2/O3, "Bound" is allocated to "r6" during ira. So there is copy
r6 = r1 before
testing Bound != NULL
The copy (using r6) blocks the shrink-wrap optimization since r6
should be saved. Need enhance shrink-wrap to handle this case.
Overall, for povray benchmark,
54 functions are shrink-wrapped for ARM;
59 functions are shrink-wrapped for X86;
25 functions are shrink-wrapped for MIPS;
26 functions are shrink-wrapped for PowerPC.
Thanks!
-Zhenqiang
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