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Pull in r175962 from upstream llvm trunk:
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Pull in r175962 from upstream llvm trunk:

X86: Disable cmov-memory patterns on subtargets without cmov.

Fixes PR15115.

For the i386 arch, this should enable cmov instructions only on
-march=pentiumpro and higher. Since our default CPU is i486, cmov
instructions will now be disabled by default.

MFC after: 1 week

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dimAuthored on
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rS247204: Add macroses to properly map IO peripherals memory window from
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head/
contrib/
llvm/
lib/
Target/
X86/

rS247205

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head/contrib/llvm/lib/Target/X86/X86InstrCompiler.td

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