diff options
| -rw-r--r-- | lib/Target/README.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 2ce2575d1c..cdadb26806 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -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 + |