Next round of PPC CR optimizations. For the following code:
int %bar(float %a, float %b, float %c, float %d) {
entry:
%tmp.1 = setlt float %a, %d
%tmp.2 = setlt float %b, %d
%or = or bool %tmp.1, %tmp.2
%tmp.3 = setgt float %c, %d
%tmp.4 = or bool %or, %tmp.3
%tmp.5 = and bool %tmp.4, true
%retval = cast bool %tmp.5 to int
ret int %retval
}
We now emit:
_bar:
.LBB_bar_0: ; entry
fcmpu cr0, f1, f4
fcmpu cr1, f2, f4
cror 0, 0, 4
fcmpu cr1, f3, f4
cror 28, 0, 5
mfcr r2
rlwinm r3, r2, 29, 31, 31
blr
Instead of:
_bar:
.LBB_bar_0: ; entry
fcmpu cr7, f1, f4
mfcr r2
rlwinm r2, r2, 29, 31, 31
fcmpu cr7, f2, f4
mfcr r3
rlwinm r3, r3, 29, 31, 31
or r2, r2, r3
fcmpu cr7, f3, f4
mfcr r3
rlwinm r3, r3, 30, 31, 31
or r3, r2, r3
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21321 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed