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Author SHA1 Message Date
Michael Liao b284414a1b [InferAddressSpaces] Enhance the handling of cosntexpr. 
Summary:
- Constant expressions may not be added in strict postorder as the
  forward instruction scan order. Thus, for a constant express (CE0), if
  its operand (CE1) is used in an previous instruction, they are not in
  postorder. However, different from
  `cloneInstructionWithNewAddressSpace`,
  `cloneConstantExprWithNewAddressSpace` doesn't bookkeep uninferred
  instructions for later resolving. That results in failure of inferring
  constant address.
- This patch adds the support to infer constant expression operand
  recursively, since there won't be loop, if that operand is another
  constant expression.

Reviewers: arsenm

Subscribers: jholewinski, jvesely, wdng, nhaehnle, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61760

llvm-svn: 360431
 2019-05-10 14:57:42 +00:00
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Nirav Dave 62fb8498d3 InferAddressSpaces: Avoid assertion failure with replacing identical 
cloned constexpr

Have cloneConstantExprWithNewAddressSpaces return nullptr when
returning initial ConstantExpr.

Reviewers: arsenm

Subscribers: jholewinski, wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D33995

llvm-svn: 304975
 2017-06-08 13:20:55 +00:00
Matt Arsenault e0f9e984fd InferAddressSpaces: Search constant expressions for addrspacecasts 
These are pretty common when using local memory, and the 64-bit generic
addressing is much more expensive to compute.

llvm-svn: 301711
 2017-04-28 22:52:41 +00:00
Matt Arsenault c18b67745b Bug 31948: Fix assertion when bitcasting constantexpr pointers 
llvm-svn: 295387
 2017-02-17 00:32:19 +00:00