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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26523 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-03-04 08:44:51 +00:00
parent c2c6038913
commit ad01993194
1 changed files with 17 additions and 0 deletions
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17
lib/Target/README.txt
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@ -101,3 +101,20 @@ into:
This would be a win on ppc32, but not x86 or ppc64.
//===---------------------------------------------------------------------===//
Pull add through mul/shift to handle this:
int foo(int P[4][4], int i) {
return P[i+2][1];
}
better than this (no addi needed):
_foo:
addi r2, r4, 2
slwi r2, r2, 4
add r2, r3, r2
lwz r3, 4(r2)
blr