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llvm-project/llvm/test/Transforms/EarlyCSE
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Juneyoung Lee cc28a75467 Let EarlyCSE fold equivalent freeze instructions 
Summary:
This patch makes EarlyCSE fold equivalent freeze instructions.

Another optimization that I think will be useful is to remove freeze if its operand is used as a branch condition or at llvm.assume:

```
  %c = ...
  br i1 %c, label %A, ..
A:
  %d = freeze %c ; %d can be optimized to %c because %c cannot be poison or undef (or 'br %c' would be UB otherwise)
```

If it make sense for EarlyCSE to support this as well, I will make a patch for this.

Reviewers: spatel, reames, lebedev.ri

Reviewed By: lebedev.ri

Subscribers: lebedev.ri, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75334
 		2020-02-28 20:35:20 +09:00
..
AArch64 Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
AMDGPU Move target tests to target subdirectories 2020-01-31 15:27:18 -08:00
PowerPC Move target tests to target subdirectories 2020-01-31 15:27:18 -08:00
X86 Move target tests to target subdirectories 2020-01-31 15:27:18 -08:00
and_or.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
atomics.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
basic.ll Let EarlyCSE fold equivalent freeze instructions 2020-02-28 20:35:20 +09:00
commute.ll [EarlyCSE] avoid crashing when detecting min/max/abs patterns (PR41083) 2020-02-10 17:25:34 -05:00
conditional.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
const-speculation.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
debug-info-undef.ll Reapply: [DebugInfo] Correctly handle salvaged casts and split fragments at ISel 2019-12-18 16:26:42 +00:00
debuginfo-dce.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
edge.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
fence.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
flags.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
floatingpoint.ll [EarlyCSE] Add support for unary FNeg to EarlyCSE 2019-08-07 14:34:41 +00:00
globalsaa-memoryssa.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
guards.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
instsimplify-dom.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
int_sideeffect.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
invariant-loads.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
invariant.start.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
memoryssa.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
pr33406.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
readnone-mayunwind.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
writeonly.ll [IR] Fix mayReadFromMemory() for writeonly calls 2019-10-21 06:52:08 +00:00