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6 Commits

Author SHA1 Message Date
Dan Gohman
15cb983f55 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
Benjamin Kramer
2cc5f86d43 Force triple; darwin's ASM syntax differs from linux's. 
llvm-svn: 85676
 2009-10-31 19:54:06 +00:00
Benjamin Kramer
60dac7de40 Add missing colons for FileCheck. 
llvm-svn: 85674
 2009-10-31 19:22:24 +00:00
Daniel Dunbar
923dc62615 "Update" tests for -disable-if-conversion removal. I think branch.ll should just 
be removed, but I XFAIL'd it for now.

llvm-svn: 82847
 2009-09-26 05:29:36 +00:00
Dan Gohman
142428ce64 Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81293
 2009-09-09 00:09:15 +00:00
Evan Cheng
7d8caa143b Also shrink immediate branches; also more assembler workarounds. 
llvm-svn: 79014
 2009-08-14 18:31:44 +00:00