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Cherrypick move optimization patch from upstream #34

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Cherrypick move optimization patch from upstream #34

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Commits on Apr 9, 2018

  1. [BRIGFE] Reduce the number of type conversions due to 

    the untyped HSAIL regs.

Instead of always representing the HSAIL's untyped registers as
unsigned int, the gccbrig now pre-analyzes the BRIG code and
builds the register variables as a type used the most when storing
or reading data to/from each register. This reduces the total
conversions which cannot be always optimized away.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254837 138bc75d-0d04-0410-961f-82ee72b054a4
    visit0r authored and Henry Linjamäki committed Apr 9, 2018
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