[PATCH] D41652: [InstCombine] Add an option to disable addrspacecast folding into GEP

[Marek Olšák via Phabricator via llvm-commits]

mareko created this revision.
mareko added reviewers: rnk, aprantl, majnemer, chandlerc, spatel, craig.topper, RKSimon, hfinkel, sanjoy, davide.
Herald added a subscriber: tpr.

AMDGPU users use addrspacecast to zero-extend a 32-bit pointer to 64 bits.
No other instruction is ever used on 32-bit pointers.

AMDGPU doesn't have full support for 32-bit pointers everywhere, so make
sure addrspacecast isn't folded, so that we don't get GEP on 32-bit
pointers.


https://reviews.llvm.org/D41652

Files:
  include/llvm/IR/Value.h
  lib/IR/Value.cpp
  lib/Transforms/InstCombine/InstructionCombining.cpp
  test/Transforms/InstCombine/cast-no-addrspacecast-folding.ll

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