Commit Graph

6 Commits

Author SHA1 Message Date
Nadav Rotem 70409991bc During the CodeGenPrepare we often lower intrinsics (such as objsize)
and allow some optimizations to turn conditional branches into unconditional.
This commit adds a simple control-flow optimization which merges two consecutive
basic blocks which are connected by a single edge. This allows the codegen to
operate on larger basic blocks.

rdar://11973998

llvm-svn: 161852
2012-08-14 05:19:07 +00:00
Benjamin Kramer 0f6ff8cb2b This test depends on cmov being available.
llvm-svn: 138954
2011-09-01 18:40:01 +00:00
Andrew Trick 832a6a1909 PreRA scheduler should avoid cloning compares.
Added canClobberReachingPhysRegUse() to handle a particular pattern in
which a two-address instruction could be forced to interfere with
EFLAGS, causing a compare to be unnecessarilly cloned.
Fixes rdar://problem/5875261

llvm-svn: 138924
2011-09-01 00:54:31 +00:00
Dan Gohman 40503396da Eliminate more uses of llvm-as and llvm-dis.
llvm-svn: 81290
2009-09-08 23:54:48 +00:00
Dan Gohman 883cbfd0ba Add CMP32mr and friends to the load-unfolding table. Among
other things, this allows the scheduler to unfold a load operand
in the 2008-01-08-SchedulerCrash.ll testcase, so it now successfully
clones the comparison to avoid a pushf+popf.

llvm-svn: 48777
2008-03-25 16:53:19 +00:00
Evan Cheng 0e400d4cb7 Special copy SUnit's do not have SDNode's.
llvm-svn: 45787
2008-01-09 23:01:55 +00:00