llvm/test/Transforms/JumpThreading, branch release_29http://llvm.orghttps://git.amat.us/llvm/atom/test/Transforms/JumpThreading?h=release_292011-02-18T04:43:06Zprevent jump threading from merging blocks when their address is2011-02-18T04:43:06ZChris Lattnersabre@nondot.org2011-02-18T04:43:06Zurn:sha1:78f7a25f9826ba66610b5bca83ebea71793abf59
taken (and used!). This prevents merging the blocks (invalidating
the block addresses) in a case like this:
#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
void foo() {
printf("%p\n", _THIS_IP_);
printf("%p\n", _THIS_IP_);
printf("%p\n", _THIS_IP_);
}
which fixes PR4151.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125829 91177308-0d34-0410-b5e6-96231b3b80d8
Tolerate degenerate phi nodes that can occur in the middle of optimization2011-02-10T23:54:10ZNick Lewyckynicholas@mxc.ca2011-02-10T23:54:10Zurn:sha1:3b739d278c87f8ac22b5dc368b319fa278347b2f
passes. Fixes PR9112. Patch by Jakub Staszak!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125319 91177308-0d34-0410-b5e6-96231b3b80d8
Re-apply r124518 with fix. Watch out for invalidated iterator.2011-01-29T04:46:23ZEvan Chengevan.cheng@apple.com2011-01-29T04:46:23Zurn:sha1:c3f507f98a0747bd256e1c13536060b6fc5c4b62
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124526 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r124518. It broke Linux self-host.2011-01-29T02:43:04ZEvan Chengevan.cheng@apple.com2011-01-29T02:43:04Zurn:sha1:b0a42fdb36b575a8ad939ca9624105908aeedf51
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124522 91177308-0d34-0410-b5e6-96231b3b80d8
Re-commit r124462 with fixes. Tail recursion elim will now dup ret into unconditional predecessor to enable TCE on demand.2011-01-29T01:29:26ZEvan Chengevan.cheng@apple.com2011-01-29T01:29:26Zurn:sha1:5e6940788fb2f8cf3ce4219d3ac0f78317f54696
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124518 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r124462. There are a few big regressions that I need to fix first.2011-01-28T07:12:38ZEvan Chengevan.cheng@apple.com2011-01-28T07:12:38Zurn:sha1:1b5c0cb71dd9d529a14cedb4bd89d544bf7e61c3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124478 91177308-0d34-0410-b5e6-96231b3b80d8
- Stop simplifycfg from duplicating "ret" instructions into unconditional2011-01-28T02:19:21ZEvan Chengevan.cheng@apple.com2011-01-28T02:19:21Zurn:sha1:40f64cb0de40802ddd2f928b62e9564e1e721ff3
branches. PR8575, rdar://5134905, rdar://8911460.
- Allow codegen tail duplication to dup small return blocks after register
allocation is done.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124462 91177308-0d34-0410-b5e6-96231b3b80d8
Teach jump threading to "look through" a select when the branch direction of a terminator depends on it.2010-12-15T09:51:20ZFrits van Bommelfvbommel@gmail.com2010-12-15T09:51:20Zurn:sha1:26e097ca4bdb31000655ff9ec39fe7d9b7ea226d
When it sees a promising select it now tries to figure out whether the condition of the select is known in any of the predecessors and if so it maps the operands appropriately.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121859 91177308-0d34-0410-b5e6-96231b3b80d8
Implement jump threading of 'indirectbr' by keeping track of whether we're looking for ConstantInt*s or BlockAddress*s.2010-12-06T23:36:56ZFrits van Bommelfvbommel@gmail.com2010-12-06T23:36:56Zurn:sha1:6033b346e20d6932cc62c754cf23ae51786724d6
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121066 91177308-0d34-0410-b5e6-96231b3b80d8
Fix PR8247: JumpThreading can cause a block to become unreachable while still having predecessor, if it is part of a self-loop.2010-09-29T20:34:41ZOwen Andersonresistor@mac.com2010-09-29T20:34:41Zurn:sha1:36c4debc94e7c68c769dfda781851a0c963dd746
Because of this, we cannot use the Simplify* APIs, as they can assert-fail on unreachable code. Since it's not easy to determine
if a given threading will cause a block to become unreachable, simply defer simplifying simplification to later InstCombine and/or
DCE passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115082 91177308-0d34-0410-b5e6-96231b3b80d8