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Commits on Jun 19, 2014

• Move optimization of some cases of (A & C1)|(B & C2) from instcombine to instsimplify. Patch by Rahul Jain, plus some last minute changes by me -- you can blame me for any bugs.

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• Make instsimplify's analysis of icmp eq/ne use computeKnownBits to determine whether the icmp is always true or false. Patch by Suyog Sarda!

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• Remove redundant code in InstCombineShift, no functionality change because instsimplify already does this and instcombine calls instsimplify a few lines above. Patch by Suyog Sarda!

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Commits on Jun 14, 2014

• Remove extra whitespace in function declaration. No functionality change.

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Commits on Jun 5, 2014

• Fix coverage for files with global constructors again. Adds a testcase to the commit from r206671, as requested by David Blaikie.

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Commits on Jun 4, 2014

• Explain why we skip DbgInfoIntrinsics when looking at line numbers in .gcno file emission.

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• Fix a use of uninitialized value. OldCC is set when IsCmpZero || IsSwapped and read when ShouldUpdateCC || IsSwapped, and ShouldUpdateCC is independent. Fixes PR19932, but no test since I wasn't ab…

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Commits on Jun 3, 2014

• Ignore line numbers on debug intrinsics. Add an assert to ensure that we aren't emitting line number zero, the .gcno format uses this to indicate that the next field is a filename.

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Commits on May 30, 2014

• When analyzing params/args for readnone/readonly, don't forget to consider that a pointer argument may be passed through a callsite to the return, and that we may need to analyze it. Fixes a bug re…

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Commits on May 20, 2014

• Teach isKnownNonNull that a nonnull return is not null. Add a test for this case as well as the case of a nonnull attribute (already handled but not tested).

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  4bf804f

• Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden!

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Commits on May 14, 2014

• Optimize integral reciprocal (udiv 1, x and sdiv 1, x) to not use division. This fires exactly once in a clang bootstrap, but covers a few different results from http://www.cs.utah.edu/~regehr/souper/

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Commits on May 9, 2014

• printCustom is only used in PseudoSourceValue, remove it from Value.

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Commits on May 8, 2014

• Improve wording to make it sounds more like a change than an analysis.

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Commits on May 6, 2014

• Detabify.

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Commits on May 5, 2014

• Improve 'tail' call marking in TRE. A bootstrap of clang goes from 375k calls marked tail in the IR to 470k, however this improvement does not carry into an improvement of the call/jmp ratio on x86…

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Commits on May 2, 2014

• Fold strlen(expr ? "str1" : "str2") to x ? len1 : len2. This fires about 330 times in a bootstrap of clang.

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Commits on Apr 18, 2014

• Check whether functions have any lines associated before emitting coverage info for them. This isn't just a size/time saving, gcov may crash on these.

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Commits on Apr 15, 2014

• Make this test not match its own filename, when being run from a path that includes the string 'add'.

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• Fix broken build of llvm using clang.

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  b6ecb4f

• Break PseudoSourceValue out of the Value hierarchy. It is now the root of its own tree containing FixedStackPseudoSourceValue (which you can use isa/dyn_cast on) and MipsCallEntry (which you can't)…

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• Add a DenseMapInfo specialization for PointerUnion. In tree user to land shortly.

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Commits on Mar 26, 2014

• Treat lifetime.start'd memory like we treat freshly alloca'd memory. Patch by Björn Steinbrink!

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Commits on Feb 26, 2014

• Remove spurious emacs major mode marker, these should only go on .h files.

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• Delete two declared overloads of CallInst::CallInst that are never defined or used. No functionality change.

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Commits on Feb 25, 2014

• Indent this continued line.

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Commits on Feb 20, 2014

• Make sure that value handle users see the transformation of an indirect call to a direct call. This is important for the CallGraph iteration. Patch by Björn Steinbrink!

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  0aabe66

• Fix change in behaviour accidentally introduced in r201754.

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• Simplify the implementation of getUnderlyingObjectsForInstr, without intending to change the semantics at all.

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Commits on Feb 6, 2014

• A memcpy out of an fresh alloca is a no-op, delete it. Patch by Patrick Walton!

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Commits on Feb 4, 2014

• Self-memcpy-elision and memcpy of constant byte to memset transforms don't care how many bytes you were trying to transfer. Sink that safety test after those transforms. Noticed by inspection.

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Commits on Jan 27, 2014

• Fix crasher introduced in r200203 and caught by a libc++ buildbot. Don't assume that getMulExpr returns a SCEVMulExpr, it may have simplified it to something else!

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• Teach SCEV to handle more cases of 'and X, CST', specifically where CST is any number of contiguous 1 bits in a row, with any number of leading and trailing 0 bits.

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Commits on Jan 21, 2014

• Add operator!= for FoldingSetNodeID and FoldingSetNodeIDRef. Implementation in

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Commits on Jan 18, 2014

• Don't refuse to transform constexpr(call(arg, ...)) to call(constexpr(arg), ...)) just because the function has multiple return values even if their return types are the same. Patch by Eduard Burte…

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