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13 Commits

Author SHA1 Message Date
Dan Gohman 2ad68de4aa Fix a bug which prevented tail merging of return instructions in 
beneficial cases. See the changes in test/CodeGen/X86/tail-opts.ll and
test/CodeGen/ARM/ifcvt2.ll for details.

The fix is to change HashEndOfMBB to hash at most one instruction,
instead of trying to apply heuristics about when it will be profitable to
consider more than one instruction. The regular tail-merging heuristics
are already prepared to handle the same cases, and they're more precise.

Also, make test/CodeGen/ARM/ifcvt5.ll and
test/CodeGen/Thumb2/thumb2-branch.ll slightly more complex so that they
continue to test what they're intended to test.

And, this eliminates the problem in
test/CodeGen/Thumb2/2009-10-15-ITBlockBranch.ll, the testcase from
PR5204. Update it accordingly.

llvm-svn: 102907
 2010-05-03 14:35:47 +00:00
Bob Wilson 298a83ecfe Stop using the old pre-UAL syntax for LDM/STM instruction suffixes. 
This does not move entirely to UAL syntax, since the default "increment after"
suffix is empty but we still use "IA" for that.

llvm-svn: 98635
 2010-03-16 16:19:07 +00:00
Jim Grosbach e09e95b35c Revert 89562. We're being sneakier than I was giving us credit for, and this 
isn't necessary.

llvm-svn: 89568
 2009-11-21 23:34:09 +00:00
Jim Grosbach 43fd822249 Darwin requires a frame pointer for all non-leaf functions to support correct 
backtraces.

llvm-svn: 89562
 2009-11-21 21:40:08 +00:00
Jim Grosbach d7cf55cd0e Use Unified Assembly Syntax for the ARM backend. 
llvm-svn: 86494
 2009-11-09 00:11:35 +00:00
Bob Wilson 9d763cc3f8 Revert 84843. Evan, this was breaking some of the if-conversion tests. 
llvm-svn: 84868
 2009-10-22 16:52:21 +00:00
Evan Cheng 3615b9bef3 Move if-conversion before post-regalloc scheduling so the predicated instruction get scheduled properly. 
llvm-svn: 84843
 2009-10-22 06:48:32 +00:00
Evan Cheng 4ad726b4be Fix tests. 
llvm-svn: 83241
 2009-10-02 06:53:57 +00:00
Evan Cheng 2dcee28a61 Move load / store multiple before post-alloc scheduling. 
llvm-svn: 83236
 2009-10-02 04:57:15 +00:00
Dan Gohman c8054d90fb Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81293
 2009-09-09 00:09:15 +00:00
Evan Cheng 77d4771405 -enable-arm-if-conversion is gone. 
llvm-svn: 42169
 2007-09-20 18:03:23 +00:00
Dan Gohman f9dd170e36 Convert tests using "| wc -l | grep ..." to use the count script. 
llvm-svn: 41097
 2007-08-15 13:36:28 +00:00
Evan Cheng 85010166a6 Added some if-conversion tests. 
llvm-svn: 37672
 2007-06-20 18:26:15 +00:00