R600: Move more out of AMDILISelLowering

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211516 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Move add/sub with overflow out of AMDILISelLowering

Add more tests for these.

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R600: Select is not expensive.

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R600: Remove AMDILISelLowering

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ARMEB: Vector extend operations

Reviewed at http://reviews.llvm.org/D4043



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Cleanup r211507

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R600: Fix formatting of intrinsic definitions.

It makes more sense for the GCCBuiltin name to come immediately
after the ID name.

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R600/SI: Fix div_scale intrinsic.

The operand that must match one of the others does matter,
and implement selecting for it.

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R600/SI: Verify restrictions on div_scale operands.

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Recommit 211309 (StringMap::insert), reverted in 211328 due to issues with private, but non-deleted, move members.

Certain versions of GCC (~4.7) couldn't handle the SFINAE on access
control, but with "= delete" (hidden behind a macro for portability)
this issue is worked around/addressed.

Patch by Agustín Bergé

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[Mips] Add a target streamer when creating a null streamer.

Should fix DebugInfo/global.ll on the mips bot.

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Change the default input for llvm-nm to be a.out instead of standard input
to match llvm-size and other UNIX systems for their nm(1).

Tweak test cases that used llvm-nm with standard input to add a "-" to
indicate that and add a test case to check the default of a.out for llvm-nm.


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Support: Extract ScaledNumbers::matchScale()

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Convert a few methods to use ErrorOr.

It used to be inconvenient to mix ErrorOr and UniquePtr, but with c++11
they work OK together.

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Fix PR20056: Implement pseudo LDR <reg>, =<literal/label> for AArch64

This patch is based on the changes from ARM target [1,2]

Based on ARM doc [3], if the literal value can be loaded with a valid MOV,
it can emit that instruction. This is implemented in this patch.

[1] Fix PR18345: ldr= pseudo instruction produces incorrect code when using in inline assembly
Author: David Peixotto <dpeixott@codeaurora.org>
commit b92cca222898d87bbc764fa22e805adb04ef7f13 (r200777)
[2] Implement the ldr-pseudo opcode for ARM assembly
Author: David Peixotto <dpeixott@codeaurora.org>
commit 0fa193b08627927ccaa0804a34d80480894614b8 (r197708)
[3] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0802a/CJAHAIBC.html

Differential Revision: http://reviews.llvm.org/D4163


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nm-trivial-object.test requires shell since Lit internal runner isn't capable of chdir.

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Simplify memory management with std::unique_ptr.

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Fix cmake build.

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This reverts commit r211533 and r211539.

 Revert "Fix PR20056: Implement pseudo LDR <reg>, =<literal/label> for AArch64"
 Revert "Fix cmake build."

It was missing a file.

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Make ObjectFile and BitcodeReader always own the MemoryBuffer.

This allows us to just use a std::unique_ptr to store the pointer to the buffer.
The flip side is that they have to support releasing the buffer back to the
caller.

Overall this looks like a more efficient and less brittle api.

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