Chris Lattner
474ed0aa9b
Improve an integer select optimization in two ways:
...
1. generalize
(select (x == 0), -1, 0) -> (sign_bit (x - 1))
to:
(select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
2. Handle the identical pattern that happens with !=:
(select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
cmov is often high latency and can't fold immediates or
memory operands. For example for (x == 0) ? -1 : 1, before
we got:
< testb %sil, %sil
< movl $-1, %ecx
< movl $1, %eax
< cmovel %ecx, %eax
now we get:
> cmpb $1, %sil
> sbbl %eax, %eax
> orl $1, %eax
llvm-svn: 120929
2010-12-05 01:23:24 +00:00
Chris Lattner
c383be807e
merge some tests into select.ll and make them more specific.
...
llvm-svn: 120928
2010-12-05 01:13:58 +00:00
Chris Lattner
7e0a594633
rename test
...
llvm-svn: 120927
2010-12-05 01:02:23 +00:00
Chris Lattner
1a760f6247
remove two tests that aren't really testing anything.
...
llvm-svn: 120926
2010-12-05 01:02:13 +00:00
Dan Gohman
df2896d609
Eliminate more uses of llvm-as and llvm-dis.
...
llvm-svn: 81290
2009-09-08 23:54:48 +00:00
Dale Johannesen
d9a9c746d8
Remove -unwind-tables-optional everywhere, since
...
this is now the default.
llvm-svn: 49667
2008-04-14 17:56:54 +00:00
Dale Johannesen
5ac0a0ed21
Rename -disable-required-unwind-tables to -unwind-tables-optional.
...
llvm-svn: 49391
2008-04-08 18:10:08 +00:00
Dale Johannesen
3f992b224e
Add -disable-required-unwind-tables to tests
...
that need it (usually, grepping for some string
found in unwind info)
llvm-svn: 49364
2008-04-08 00:14:17 +00:00
Dale Johannesen
d9a5b77269
Mark functions in some tests as 'nounwind'. Generating
...
EH info for these functions causes the tests to fail for
random reasons (e.g. looking for 'or' or counting lines
with asm-printer; labels count as lines.)
llvm-svn: 49003
2008-03-31 23:20:09 +00:00
Evan Cheng
25b65542d9
Update test.
...
llvm-svn: 42775
2007-10-08 22:20:32 +00:00
Reid Spencer
df17fa8ef9
For PR1319:
...
Remove && from the end of the lines to prevent tests from throwing run
lines into the background. Also, clean up places where the same command
is run multiple times by using a temporary file.
llvm-svn: 36142
2007-04-16 17:36:08 +00:00
Reid Spencer
82293f34de
For PR411:
...
Update these tests to not use the same name even though the type of the
value differs. After PR411 hits, type planes will be gone and it will be
illegal for a name to be used twice, regardless of type.
llvm-svn: 33660
2007-01-30 16:16:01 +00:00
Reid Spencer
4572ce85b0
Regression is gone, don't try to find it on clean target.
...
llvm-svn: 33296
2007-01-17 07:59:14 +00:00
