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* When inlining through an 'nounwind' call, mark inlinedDuncan Sands2007-12-193-21/+34
| | | | | | | | | | calls 'nounwind'. It is important for correct C++ exception handling that nounwind markings do not get lost, so this transformation is actually needed for correctness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45218 91177308-0d34-0410-b5e6-96231b3b80d8
* Fold subtracts into integer compares vs. zero. This improves generate code ↵Christopher Lamb2007-12-181-1/+18
| | | | | | | | | | | | | | | | | | | | | | | | for this case on X86 from _foo: movl $99, %ecx movl 4(%esp), %eax subl %eax, %ecx xorl %edx, %edx testl %ecx, %ecx cmovs %edx, %eax ret to _foo: xorl %ecx, %ecx movl 4(%esp), %eax cmpl $99, %eax cmovg %ecx, %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45173 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix commentsChristopher Lamb2007-12-181-4/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45170 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove an orthogonal transformation of the selection condition from my most ↵Christopher Lamb2007-12-181-30/+2
| | | | | | recent submission. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45169 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename isNoReturn to doesNotReturn, and isNoUnwind toDuncan Sands2007-12-184-11/+11
| | | | | | | doesNotThrow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45160 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix typos.Christopher Lamb2007-12-181-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45159 91177308-0d34-0410-b5e6-96231b3b80d8
* Fold certain additions through selects (and their compares) so as to ↵Christopher Lamb2007-12-181-0/+61
| | | | | | | | | eliminate subtractions. This code is often produced by the SMAX expansion in SCEV. This implements test/Transforms/InstCombine/2007-12-18-AddSelCmpSub.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45158 91177308-0d34-0410-b5e6-96231b3b80d8
* Make invokes of inline asm legal. Teach codegenDuncan Sands2007-12-171-3/+2
| | | | | | | | | how to lower them (with no attempt made to be efficient, since they should only occur for unoptimized code). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45108 91177308-0d34-0410-b5e6-96231b3b80d8
* GLIBCXX_DEBUG fix. std::vector<>::end() is invalidated by erase.David Greene2007-12-171-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45101 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of annoying spaces.David Greene2007-12-171-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45100 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix GLIBCXX_DEBUG errors. Erase invalidates std::vector iteratorsDavid Greene2007-12-171-4/+3
| | | | | | | | passed the erased element. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45099 91177308-0d34-0410-b5e6-96231b3b80d8
* Change the PointerType api for creating pointer types. The old functionality ↵Christopher Lamb2007-12-1711-70/+82
| | | | | | of PointerType::get() has become PointerType::getUnqual(), which returns a pointer in the generic address space. The new prototype of PointerType::get() requires both a type and an address space. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45082 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert this part of r45073 until the verifier isDuncan Sands2007-12-161-2/+3
| | | | | | | changed not to reject invoke of inline asm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45077 91177308-0d34-0410-b5e6-96231b3b80d8
* Make instcombine promote inline asm calls to 'nounwind'Duncan Sands2007-12-162-3/+15
| | | | | | | | | | | | | | calls. Remove special casing of inline asm from the inliner. There is a potential problem: the verifier rejects invokes of inline asm (not sure why). If an asm call is not marked "nounwind" in some .ll, and instcombine is not run, but the inliner is run, then an illegal module will be created. This is bad but I'm not sure what the best approach is. I'm tempted to remove the check in the verifier... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45073 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix typo.Evan Cheng2007-12-131-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44997 91177308-0d34-0410-b5e6-96231b3b80d8
* Be extra careful with extension use optimation. Now turned on by default.Evan Cheng2007-12-131-3/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44981 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix for edge profiling, patch by 'Marc' for PR1857Chris Lattner2007-12-131-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44965 91177308-0d34-0410-b5e6-96231b3b80d8
* 1. "Upgrage" comments.Wojciech Matyjewicz2007-12-121-15/+16
| | | | | | | | | | | | | | | | 2. Using zero-extended value of Scale and unsigned division is safe provided that Scale doesn't have the sign bit set. Previously these 2 instructions: %p = bitcast [100 x {i8,i8,i8}]* %x to i8* %q = getelementptr i8* %p, i32 -4 were combined into: %q = getelementptr [100 x { i8, i8, i8 }]* %x, i32 0, i32 1431655764, i32 0 what was incorrect. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44936 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't muck with phi nodes; bug fixes.Evan Cheng2007-12-121-2/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44905 91177308-0d34-0410-b5e6-96231b3b80d8
* Bug fix. Only safe to perform extension uses optimization if the source of ↵Evan Cheng2007-12-121-0/+5
| | | | | | extension is also defined in the same BB as the extension. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44896 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1850 by removing an unsafe transformation from VMCore/ConstantFold.cpp.Chris Lattner2007-12-101-1/+7
| | | | | | | | | Reimplement the xform in Analysis/ConstantFolding.cpp where we can use targetdata to validate that it is safe. While I'm in there, fix some const correctness issues and generalize the interface to the "operand folder". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44817 91177308-0d34-0410-b5e6-96231b3b80d8
* Make PruneEH update the nounwind/noreturn attributesDuncan Sands2007-12-102-76/+81
| | | | | | | on functions as it calculates them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44802 91177308-0d34-0410-b5e6-96231b3b80d8
* Adding a collector name attribute to Function in the IR. These Gordon Henriksen2007-12-101-0/+2
| | | | | | | | | | | | | | | | | | | | | methods are new to Function: bool hasCollector() const; const std::string &getCollector() const; void setCollector(const std::string &); void clearCollector(); The assembly representation is as such: define void @f() gc "shadow-stack" { ... The implementation uses an on-the-side table to map Functions to collector names, such that there is no overhead. A StringPool is further used to unique collector names, which are extremely likely to be unique per process. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44769 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix several cache coherence bugs in MemDep/GVN that were found. Also add ↵Owen Anderson2007-12-081-2/+6
| | | | | | | | | some (disabled) debugging code to make such problems easier to diagnose in the future, written by Duncan Sands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44695 91177308-0d34-0410-b5e6-96231b3b80d8
* simplify some code.Chris Lattner2007-12-061-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44655 91177308-0d34-0410-b5e6-96231b3b80d8
* move some ashr-specific code out of commonShiftTransforms into visitAShr.Chris Lattner2007-12-061-15/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44650 91177308-0d34-0410-b5e6-96231b3b80d8
* If both result of the {s|z}xt and its source are live out, rewrite all uses ↵Evan Cheng2007-12-051-3/+71
| | | | | | of the source with result of extension. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44643 91177308-0d34-0410-b5e6-96231b3b80d8
* Rather than having special rules like "intrinsics cannotDuncan Sands2007-12-034-8/+6
| | | | | | | | | | throw exceptions", just mark intrinsics with the nounwind attribute. Likewise, mark intrinsics as readnone/readonly and get rid of special aliasing logic (which didn't use anything more than this anyway). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44544 91177308-0d34-0410-b5e6-96231b3b80d8
* update file comment.Chris Lattner2007-12-031-2/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44543 91177308-0d34-0410-b5e6-96231b3b80d8
* If ExitValue operand is also defined in Loop header thenDevang Patel2007-12-031-0/+17
| | | | | | | | | insert new ExitValue after this operand definition. This fixes PR1828. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44539 91177308-0d34-0410-b5e6-96231b3b80d8
* Integrate the readonly/readnone logic more deeplyDuncan Sands2007-12-014-27/+19
| | | | | | | | | | | | | | | | into alias analysis. This meant updating the API which now has versions of the getModRefBehavior, doesNotAccessMemory and onlyReadsMemory methods which take a callsite parameter. These should be used unless the callsite is not known, since in general they can do a better job than the versions that take a function. Also, users should no longer call the version of getModRefBehavior that takes both a function and a callsite. To reduce the chance of misuse it is now protected. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44487 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a miscompilation in spiff on PPC.Owen Anderson2007-11-291-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44437 91177308-0d34-0410-b5e6-96231b3b80d8
* Add some convenience methods for querying attributes, andDuncan Sands2007-11-281-31/+2
| | | | | | | use them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44403 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1146: parameter attributes are longer part ofDuncan Sands2007-11-2713-37/+104
| | | | | | | | | | | | | the function type, instead they belong to functions and function calls. This is an updated and slightly corrected version of Reid Spencer's original patch. The only known problem is that auto-upgrading of bitcode files doesn't seem to work properly (see test/Bitcode/AutoUpgradeIntrinsics.ll). Hopefully a bitcode guru (who might that be? :) ) will fix it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44359 91177308-0d34-0410-b5e6-96231b3b80d8
* Make LoopInfoBase more generic, in preparation for having MachineLoopInfo. ↵Owen Anderson2007-11-277-15/+15
| | | | | | This involves a small interface change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44348 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix another bug that was causing siod to fail.Owen Anderson2007-11-261-19/+29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44325 91177308-0d34-0410-b5e6-96231b3b80d8
* Allow GVN to eliminate read-only function calls when it can detect that they ↵Owen Anderson2007-11-261-1/+18
| | | | | | are redundant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44323 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove another leak. Due to some reason AliasSetTracker didn't had any dtor...Anton Korobeynikov2007-11-251-0/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44320 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement PR1822Chris Lattner2007-11-251-0/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44318 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1816. If a bitcast of a function only exists because of aDuncan Sands2007-11-251-4/+5
| | | | | | | | | | trivial difference in function attributes, allow calls to it to be converted to direct calls. Based on a patch by Török Edwin. While there, move the various lists of mutually incompatible parameters etc out of the verifier and into ParameterAttributes.h. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44315 91177308-0d34-0410-b5e6-96231b3b80d8
* add a comment.Chris Lattner2007-11-231-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44293 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some logic I thoughtlessly copied overDuncan Sands2007-11-231-3/+0
| | | | | | | | | from the old ADCE implementation (there it was correct because the transform was being done for read-only functions). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44287 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1817.Chris Lattner2007-11-221-1/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44284 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't crash on bogus llvm.noinline. This is first part of PR1817 (preventing ↵Anton Korobeynikov2007-11-221-0/+4
| | | | | | reduction) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44281 91177308-0d34-0410-b5e6-96231b3b80d8
* Turn invokes of nounwind functions into ordinary calls.Duncan Sands2007-11-221-1/+49
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44280 91177308-0d34-0410-b5e6-96231b3b80d8
* Readonly/readnone functions are allowed to throwDuncan Sands2007-11-221-27/+1
| | | | | | | | exceptions, so don't turn invokes of them into calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44278 91177308-0d34-0410-b5e6-96231b3b80d8
* typoNick Lewycky2007-11-211-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44262 91177308-0d34-0410-b5e6-96231b3b80d8
* Add explicit keywords.Dan Gohman2007-11-191-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44234 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove indeterminism from a loop. We think this willDale Johannesen2007-11-171-2/+6
| | | | | | | | | fix an occasional nonrepeatable bootstrap failure we've been seeing on Darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44202 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR1800 by correcting mistaken logic.Chris Lattner2007-11-161-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44188 91177308-0d34-0410-b5e6-96231b3b80d8
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