Use the range machinery for DW_AT_ranges and DW_AT_high/lo_pc.

This commit moves us from a single range per subprogram to extending
ranges if we are:

a) In the same section, and
b) In the same enclosing CU.

This means we have more fine grained ranges for compile units, and fewer
ranges overall when we have multiple functions in the same CU
adjacent to each other in the object file.

Also remove all of the earlier hacks around this functionality for
function sections etc. Also update all of the testcases to take into
account the merging functionality.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204277 91177308-0d34-0410-b5e6-96231b3b80d8
Support: Add postincrement and include guards to LineIterator

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204279 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Use the range machinery for DW_AT_ranges and DW_AT_high/lo_pc."

This appears to trigger failures with optimization and function arguments somehow.

This reverts commit r204277.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204286 91177308-0d34-0410-b5e6-96231b3b80d8
Look through variables when computing relocations.

Given

bar = foo + 4
	.long bar

MC would eat the 4. GNU as includes it in the relocation. The rule seems to be
that a variable that defines a symbol is used in the relocation and one that
does not define a symbol is evaluated and the result included in the relocation.

Fixing this unfortunately required some other changes:

* Since the variable is now evaluated, it would prevent the ELF writer from
  noticing the weakref marker the elf streamer uses. This patch then replaces
  that with a VariantKind in MCSymbolRefExpr.

* Using VariantKind then requires us to look past other VariantKind to see

	.weakref	bar,foo
	call	bar@PLT

  doing this also fixes

	zed = foo +2
	call zed@PLT

  so that is a good thing.

* Looking past VariantKind means that the relocation selection has to use
  the fixup instead of the target.

This is a reboot of the previous fixes for MC. I will watch the sanitizer
buildbot and wait for a build before adding back the previous fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204294 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM]Fix an assertion failure in A15SDOptimizer about DPair reg class by treating DPair as QPR.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204304 91177308-0d34-0410-b5e6-96231b3b80d8
[X86] Check return value of readSIB in disassembler so errors propagate. In particular this makes a too short instruction with a missing SIB byte fail.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204305 91177308-0d34-0410-b5e6-96231b3b80d8
Reapply 'ARM IAS: support .thumb_set'

Re-apply the change after it was reverted to do conflicts due to another change
being reverted.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204306 91177308-0d34-0410-b5e6-96231b3b80d8
Object: Don't double-escape empty hexdata

We would emit a pair of double quotes inside a pair of single quotes.
Just use a pair of single quotes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204312 91177308-0d34-0410-b5e6-96231b3b80d8
Object: Abstract out the determination of function line symbols

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204313 91177308-0d34-0410-b5e6-96231b3b80d8
Object: Output .file symbols properly

obj2yaml would emit the NUL bytes padding the auxiliary file symbol
records.  Trimming them looks nicer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204314 91177308-0d34-0410-b5e6-96231b3b80d8
Test case for r204305.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204316 91177308-0d34-0410-b5e6-96231b3b80d8
Add llvm_unreachable after fully-covered switches to appease GCC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204318 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Splitting up class definition from implementation.

Also removed some unnecessary #includes.

No functional changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204320 91177308-0d34-0410-b5e6-96231b3b80d8
Mark alias symbols as microMIPS if necessary.   Differential Revision: http://llvm-reviews.chandlerc.com/D3080

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204323 91177308-0d34-0410-b5e6-96231b3b80d8
Implementation of microMIPS 16-bit instructions MOVE and JALR.
Differential Revision: http://llvm-reviews.chandlerc.com/D3112


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204325 91177308-0d34-0410-b5e6-96231b3b80d8
Provide an operand for microMIPS wait instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204329 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Do not instrument globals from the llvm.metadata section.
Fixes https://code.google.com/p/address-sanitizer/issues/detail?id=279.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204331 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Add -asan-module to the ASan .ll tests.
After the -asan pass had been split into -asan (function-level) and -asan-module (module-level) some of the
tests have silently stopped working, because they didn't instrument the globals anymore.
We've decided to have every test using both passes, irrespective of the presence of globals in it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204335 91177308-0d34-0410-b5e6-96231b3b80d8
[MIPS] Add cpu octeon and some instructions

The Octeon cpu from Cavium Networks is mips64r2 based and has an extended
instruction set. In order to utilize this with LLVM, a new cpu feature "octeon"
and a subtarget feature "cnmips" is added. A small set of new instructions
(baddu, dmul, pop, dpop, seq, sne) is also added. LLVM generates dmul, pop and
dpop instructions with option -mcpu=octeon or -mattr=+cnmips.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204337 91177308-0d34-0410-b5e6-96231b3b80d8
Add a test for LowerInvoke that doesn't use "-enable-correct-eh-support"

None of the existing tests for LowerInvoke check LowerInvoke's output,
and all but one use "-enable-correct-eh-support", which is obsolete,
so those tests will be removed when that option is removed.

To make sure LowerInvoke will still have test coverage, this adds a
test for its default mode which converts invokes to calls.

Differential Revision: http://llvm-reviews.chandlerc.com/D3124

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204344 91177308-0d34-0410-b5e6-96231b3b80d8