llvm/lib/Transforms/InstCombine, branch stable

Check if Type is a vector before calling function Type::getVectorNumElements.

2013-03-28T01:28:02Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178208 91177308-0d34-0410-b5e6-96231b3b80d8

Make InstCombineCasts.cpp:OptimizeIntToFloatBitCast endian safe.

2013-03-26T15:36:14Z

The OptimizeIntToFloatBitCast converts shift-truncate sequences into extractelement operations. The computation of the element index to be used in the resulting operation is currently only correct for little-endian targets. This commit fixes the element index computation to be correct for big-endian targets as well. If the target byte order is unknown, the optimization cannot be performed at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178031 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug in fast-math fadd/fsub simplification.

2013-03-25T20:43:41Z

The problem is that the code mistakenly took for granted that following constructor is able to create an APFloat from a *SIGNED* integer: APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value) rdar://13486998 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177906 91177308-0d34-0410-b5e6-96231b3b80d8

Address issues found by Duncan during post-commit review of r177856.

2013-03-25T11:47:38Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177863 91177308-0d34-0410-b5e6-96231b3b80d8

InstCombine: simplify comparisons to zero of (shl %x, Cst) or (mul %x, Cst)

2013-03-25T09:48:49Z

This simplification happens at 2 places : - using the nsw attribute when the shl / mul is used by a sign test - when the shl / mul is compared for (in)equality to zero git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177856 91177308-0d34-0410-b5e6-96231b3b80d8

InstCombine: Improve the result bitvect type when folding (cmp pred (load (gep GV, i)) C) to a bit test.

2013-03-22T08:25:01Z

The original code used i32, and i64 if legal. This introduced unneeded casts when they aren't legal, or when the index variable i has another type. In order of preference: try to use i's type; use the smallest fitting legal type (using an added DataLayout method); default to i32. A testcase checks that this works when the index gep operand is i16. Patch by : Ahmed Bougacha Reviewed by : Duncan git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177712 91177308-0d34-0410-b5e6-96231b3b80d8

Perform factorization as a last resort of unsafe fadd/fsub simplification.

2013-03-14T18:08:26Z

Rules include: 1)1 x*y +/- x*z => x*(y +/- z) (the order of operands dosen't matter) 2) y/x +/- z/x => (y +/- z)/x The transformation is disabled if the new add/sub expr "y +/- z" is a denormal/naz/inifinity. rdar://12911472 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177088 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a performance regression when combining to smaller types in icmp (shl %v, C1), C2 :

2013-03-13T14:40:37Z

Only combine when the shl is only used by the icmp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176950 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify code. No functionality change.

2013-03-09T11:18:59Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176765 91177308-0d34-0410-b5e6-96231b3b80d8

InstCombine: Don't shrink allocas when combining with a bitcast.

2013-03-06T05:44:53Z

When considering folding a bitcast of an alloca into the alloca itself, make sure we don't shrink the amount of memory being allocated, or things rapidly go sideways. rdar://13324424 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176547 91177308-0d34-0410-b5e6-96231b3b80d8