[PATCH] D22324: Move a transform from InstCombine to InstSimplify.

[David Majnemer via llvm-commits]

majnemer created this revision.
majnemer added reviewers: mkuper, spatel, RKSimon.
majnemer added a subscriber: llvm-commits.

This transform doesn't require any new instructions, it can safely live
in InstSimplify.

[ConstantFolding] Extend FoldReinterpretLoadFromConstPtr to handle negative offsets

Treat loads which clip before the start of a global initializer the same
way we treat clipping beyond the end of the initializer: use zeros.

[ConstantFolding] Fold masked loads

We can constant fold a masked load if the operands are appropriately
constant.

http://reviews.llvm.org/D22324

Files:
  lib/Analysis/ConstantFolding.cpp
  lib/Analysis/InstructionSimplify.cpp
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstSimplify/call.ll
  test/Transforms/InstSimplify/load.ll

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