diff options
Diffstat (limited to 'lib/Target/README.txt')
-rw-r--r-- | lib/Target/README.txt | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index c942d94..37c0a35 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -464,21 +464,3 @@ entry: } //===---------------------------------------------------------------------===// - -This code is often produced by the SMAX expansion in SCEV: - -define i32 @foo(i32 %a) { -entry: - %tmp15 = sub i32 99, %a ; <i32> [#uses=2] - %tmp16 = icmp slt i32 %tmp15, 0 ; <i1> [#uses=1] - %smax = select i1 %tmp16, i32 0, i32 %tmp15 ; <i32> [#uses=1] - %tmp12 = add i32 %smax, %a ; <i32> [#uses=1] - %tmp13 = add i32 %tmp12, 1 ; <i32> [#uses=1] - ret i32 %tmp13 -} - -Note that the tmp12 add can be pushed through the select operands, turning -it into a "select %tmp16, %a, 99". We apparently already do this in dag -combine because it isn't present in X86 output. - -//===---------------------------------------------------------------------===// |