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llvm-svn: 35530
This commit is contained in:
Chris Lattner 2007-03-31 07:06:25 +00:00
parent f01b0a800b
commit cea5e599ed
1 changed files with 23 additions and 0 deletions
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23
lib/Target/PowerPC/README.txt
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@ -639,3 +639,26 @@ __ZNK4llvm5APInt17countLeadingZerosEv:
The dead or is a 'truncate' from 64- to 32-bits.
===-------------------------------------------------------------------------===
We generate horrible ppc code for this:
#define N 2000000
double a[N],c[N];
void simpleloop() {
int j;
for (j=0; j<N; j++)
c[j] = a[j];
}
LBB1_1: ;bb
lfdx f0, r3, r4
addi r5, r5, 1 ;; Extra IV for the exit value compare.
stfdx f0, r2, r4
addi r4, r4, 8
xoris r6, r5, 30 ;; This is due to a large immediate.
cmplwi cr0, r6, 33920
bne cr0, LBB1_1
===-------------------------------------------------------------------------===