diff options
| -rw-r--r-- | lib/Target/README.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index fd862fe63a..54bd94811d 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -190,3 +190,21 @@ The rlwinm (an and by 65535) is dead. The dag combiner should propagate bits better than that to see this. //===---------------------------------------------------------------------===// + +Add support for conditional increments, and other related patterns. Instead +of: + + movl 136(%esp), %eax + cmpl $0, %eax + je LBB16_2 #cond_next +LBB16_1: #cond_true + incl _foo +LBB16_2: #cond_next + +emit: + movl _foo, %eax + cmpl $1, %edi + sbbl $-1, %eax + movl %eax, _foo + +//===---------------------------------------------------------------------===// |