Chris Lattner
329ea064ed
jump threading can't split a critical edge from an indirectbr. This
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fixes PR7356.
llvm-svn: 105950
2010-06-14 19:45:43 +00:00
Chris Lattner
9ae28b141f
fix PR6743, a case where we'd delete an instruction before using it
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in some cases.
llvm-svn: 100937
2010-04-10 18:26:57 +00:00
Chris Lattner
6fbfe5897c
fix PR6305 by handling BlockAddress in a helper function
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called by jump threading.
llvm-svn: 96263
2010-02-15 20:47:49 +00:00
Chris Lattner
29b15c5cfd
third bug from PR6119: the xor dupe extension allows
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for arbitrary terminators in predecessors, don't assume
it is a conditional or uncond branch. The testcase shows
an example where they can happen with switches.
llvm-svn: 94323
2010-01-23 19:21:31 +00:00
Chris Lattner
ba2d0b89ff
add an early out to ProcessBranchOnXOR to speed it up,
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handle the case when we can infer an input to the xor
from all inputs that agree, instead of going into an
infinite loop. Another part of PR6199
llvm-svn: 94321
2010-01-23 19:16:25 +00:00
Chris Lattner
de5ab4860f
fix a crash in jump threading, PR6119
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llvm-svn: 94319
2010-01-23 18:56:07 +00:00
Chris Lattner
6d6f10fe91
fix PR5698
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llvm-svn: 90708
2009-12-06 17:17:23 +00:00
Chris Lattner
3c9aca9079
fix PR5640 by tracking whether a block is the header of a loop more
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precisely, which prevents us from infinitely peeling the loop.
llvm-svn: 90211
2009-12-01 06:04:43 +00:00
Chris Lattner
5ff7f5672e
reapply 86289, 86278, 86270, 86267, 86266 & 86264 plus a fix
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(making pred factoring only happen if threading is guaranteed
to be successful).
This now survives an X86-64 bootstrap of llvm-gcc.
llvm-svn: 86355
2009-11-07 08:05:03 +00:00
Devang Patel
3a42e7ac65
Revert following patches to fix llvmgcc bootstrap.
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86289, 86278, 86270, 86267, 86266 & 86264
Chris, please take a look.
llvm-svn: 86321
2009-11-07 01:32:59 +00:00
Chris Lattner
a8b9ce3f07
Fix a problem discovered on self host.
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llvm-svn: 86278
2009-11-06 19:21:48 +00:00
Chris Lattner
046dff7acf
merge a few crash tests into crash.ll
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llvm-svn: 86119
2009-11-05 05:57:34 +00:00
Chris Lattner
7f903681ac
alternate fix for PR5258 which avoids worklist problems, with reduced testcase.
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llvm-svn: 84667
2009-10-20 20:27:49 +00:00
Chris Lattner
4140d8bd5c
another testcase jump threading shouldn't crash on.
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llvm-svn: 83758
2009-10-11 07:11:11 +00:00
Chris Lattner
ece16f2335
rename a file, remove a poorly reduced testcase.
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llvm-svn: 83757
2009-10-11 07:10:28 +00:00
