Petar Avramovic b5a939d246 [MIPS GlobalISel] Combine extending loads ...

Use CombinerHelper to combine extending load instructions.
G_LOAD combined with G_ZEXT, G_SEXT or G_ANYEXT gives G_ZEXTLOAD,
G_SEXTLOAD or G_LOAD with same type as def of extending instruction
respectively.
Similarly G_ZEXTLOAD combined with G_ZEXT gives G_ZEXTLOAD and
G_SEXTLOAD combined with G_SEXT gives G_SEXTLOAD with same type
as def of extending instruction.

Differential Revision: https://reviews.llvm.org/D56914

llvm-svn: 352037

2019-01-24 10:09:52 +00:00

3.4 KiB

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