yaml2obj, COFF: Consider the DOS stub when laying out section headers

While this program worked correctly with small example programs, larger
ones tickled this bug.  I'm working on a reduction because my program is
quite large.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222078 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Permute operands when selecting legacy min/max

This gets the correct NaN behavior based on the compare type
the hardware uses. This now passes the new piglit test I have
for this on SI.

Add stricter tests for the operand order.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222079 91177308-0d34-0410-b5e6-96231b3b80d8
Provide missing definition of uppercase_CMAKE_BUILD_TYPE in HandleLLVMOptions module

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222082 91177308-0d34-0410-b5e6-96231b3b80d8
Dispose disassembler after use in unit test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222083 91177308-0d34-0410-b5e6-96231b3b80d8
[X86][SSE] Improve legal SHUFP and PSHUFD shuffle matching

Updated X86TargetLowering::isShuffleMaskLegal to match SHUFP masks with commuted inputs and PSHUFD masks that reference the second input.

As part of this I've refactored isPSHUFDMask to work in a more general manner and allow it to match against either the first or second input vector.

Differential Revision: http://reviews.llvm.org/D6287



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222087 91177308-0d34-0410-b5e6-96231b3b80d8
[DAG] Improved target independent vector shuffle folding logic.

This patch teaches the DAGCombiner how to combine shuffles according to rules:
   shuffle(shuffle(A, Undef, M0), B, M1) -> shuffle(B, A, M2)
   shuffle(shuffle(A, B, M0), B, M1) -> shuffle(B, A, M2)
   shuffle(shuffle(A, B, M0), A, M1) -> shuffle(B, A, M2)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222090 91177308-0d34-0410-b5e6-96231b3b80d8
InstSimplify: Optimize ICmpInst xform that uses computeKnownBits

A few things:
- computeKnownBits is relatively expensive, let's delay its use as long
  as we can.
- Don't create two APInt values just to run computeKnownBits on a
  ConstantInt, we already know the exact value!
- Avoid creating a temporary APInt value in order to calculate unary
  negation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222092 91177308-0d34-0410-b5e6-96231b3b80d8
ScalarEvolution: HowFarToZero was wrongly using signed division

HowFarToZero was supposed to use unsigned division in order to calculate
the backedge taken count.  However, SCEVDivision::divide performs signed
division.  Unless I am mistaken, no users of SCEVDivision actually want
signed arithmetic: switch to udiv and urem.

This fixes PR21578.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222093 91177308-0d34-0410-b5e6-96231b3b80d8
[x86] Remove two redundant isel patterns. They equivalent already exists in the instruction pattern.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222094 91177308-0d34-0410-b5e6-96231b3b80d8
[DependenceAnalysis] Allow subscripts of different types

Summary:
Several places in DependenceAnalysis assumes both SCEVs in a subscript pair
share the same integer type. For instance, isKnownPredicate calls
SE->getMinusSCEV(X, Y) which asserts X and Y share the same type. However,
DependenceAnalysis fails to ensure this assumption when producing a subscript
pair, causing tests such as NonCanonicalizedSubscript to crash. With this
patch, DependenceAnalysis runs unifySubscriptType before producing any
subscript pair, ensuring the assumption.

Test Plan:
Added NonCanonicalizedSubscript.ll on which DependenceAnalysis before the fix
crashed because subscripts have different types.

Reviewers: spop, sebpop, jingyue

Reviewed By: jingyue

Subscribers: eliben, meheff, llvm-commits

Differential Revision: http://reviews.llvm.org/D6289

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222100 91177308-0d34-0410-b5e6-96231b3b80d8
ScalarEvolution: Introduce SCEVSDivision and SCEVUDivision

It turns out that not all users of SCEVDivision want the same
signedness.  Let the users determine which operation they'd like by
explicitly choosing SCEVUDivision or SCEVSDivision.

findArrayDimensions and computeAccessFunctions will use SCEVSDivision
while HowFarToZero will use SCEVUDivision.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222104 91177308-0d34-0410-b5e6-96231b3b80d8
Convert some EVTs to MVTs where only a SimpleValueType is needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222109 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222110 91177308-0d34-0410-b5e6-96231b3b80d8
Replace a couple asserts with static_asserts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222114 91177308-0d34-0410-b5e6-96231b3b80d8
Implement MachODumper::printFileHeaders

Patch by Chilledheart.

Differential Revision: http://reviews.llvm.org/D6163

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222115 91177308-0d34-0410-b5e6-96231b3b80d8
Add back r222061 with a fix.

This adds back r222061, but now calls initializePAEvalPass from the correct
library to avoid link problems.

Original message:

Don't make assumptions about the name of private global variables.

Private variables are can be renamed, so it is not reliable to make
decisions on the name.

The name is also dropped by the assembler before getting to the
linker, so using the name causes a disconnect between how llvm makes a
decision (var name) and how the linker makes a decision (section it is
in).

This patch changes one case where we were looking at the variable name to use
the section instead.

Test tuning by Michael Gottesman.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222117 91177308-0d34-0410-b5e6-96231b3b80d8
Move register class name strings to a single array in MCRegisterInfo to reduce static table size and number of relocation entries.

Indices into the table are stored in each MCRegisterClass instead of a pointer. A new method, getRegClassName, is added to MCRegisterInfo and TargetRegisterInfo to lookup the string in the table.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222118 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing semicolon from r222118.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222119 91177308-0d34-0410-b5e6-96231b3b80d8
Fix CR/LF line endings in test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222120 91177308-0d34-0410-b5e6-96231b3b80d8
Optimize switch lookup tables with linear mapping.

This is a simple optimization for switch table lookup:
It computes the output value directly with an (optional) mul and add if there is a linear mapping between index and output.
Example:

int f1(int x) {
  switch (x) {
    case 0: return 10;
    case 1: return 11;
    case 2: return 12;
    case 3: return 13;
  }
  return 0;
}

generates:

define i32 @f1(i32 %x) #0 {
entry:
  %0 = icmp ult i32 %x, 4
  br i1 %0, label %switch.lookup, label %return

switch.lookup:
  %switch.offset = add i32 %x, 10
  ret i32 %switch.offset

return:
  ret i32 0
}



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222121 91177308-0d34-0410-b5e6-96231b3b80d8