Zaara Syeda 72c84455d5 Re-commit: [MachineLICM] Add functions to MachineLICM to hoist invariant stores ... This patch adds functions to allow MachineLICM to hoist invariant stores. Currently, MachineLICM does not hoist any store instructions, however when storing the same value to a constant spot on the stack, the store instruction should be considered invariant and be hoisted. The function isInvariantStore iterates each operand of the store instruction and checks that each register operand satisfies isCallerPreservedPhysReg. The store may be fed by a copy, which is hoisted by isCopyFeedingInvariantStore. This patch also adds the PowerPC changes needed to consider the stack register as caller preserved. Differential Revision: https://reviews.llvm.org/D40196 llvm-svn: 328326		2018-03-23 15:28:15 +00:00
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llvm	Re-commit: [MachineLICM] Add functions to MachineLICM to hoist invariant stores	2018-03-23 15:28:15 +00:00
llvm-c	Reapply Support layering fixes.	2018-03-21 17:31:49 +00:00