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10 Commits

Author SHA1 Message Date
David L Kreitzer 4d7257dfa1 Fix for two constant propagation problems in GVN with the assume intrinsic 
instruction.

Patch by Yuanrui Zhang.

Differential Revision: http://reviews.llvm.org/D16100

llvm-svn: 258435
 2016-01-21 21:32:35 +00:00
Piotr Padlewski dc9b2cfc50 inariant.group handling in GVN 
The most important part required to make clang
devirtualization works ( ͡°͜ʖ ͡°).
The code is able to find non local dependencies, but unfortunatelly
because the caller can only handle local dependencies, I had to add
some restrictions to look for dependencies only in the same BB.

http://reviews.llvm.org/D12992

llvm-svn: 249196
 2015-10-02 22:12:22 +00:00
Piotr Padlewski 0c7d8fc1f6 assuem(X) handling in GVN bugfix 
There was infinite loop because it was trying to change assume(true) into
assume(true)
Also added handling when assume(false) appear

http://reviews.llvm.org/D12516

llvm-svn: 246697
 2015-09-02 20:00:03 +00:00
Piotr Padlewski 28ffcbe1cc Constant propagation after hitting assume(cmp) bugfix 
Last time code run into assertion `BBE.isSingleEdge()` in
lib/IR/Dominators.cpp:200.

http://reviews.llvm.org/D12170

llvm-svn: 246696
 2015-09-02 19:59:59 +00:00
Piotr Padlewski 14e815c22b Constant propagation after hiting llvm.assume 
After hitting @llvm.assume(X) we can:
- propagate equality that X == true
- if X is icmp/fcmp (with eq operation), and one of operand
  is constant we can change all variables with constants in the same BasicBlock

http://reviews.llvm.org/D11918

llvm-svn: 246695
 2015-09-02 19:59:53 +00:00
Steven Wu 61db34d12e Revert r246244 and r246243 
These two commits cause clang/llvm bootstrap to hang.

llvm-svn: 246279
 2015-08-28 06:52:00 +00:00
Piotr Padlewski 3f81ec1e38 Constant propagation after hitting assume(cmp) bugfix 
Last time code run into assertion `BBE.isSingleEdge()` in
lib/IR/Dominators.cpp:200.

http://reviews.llvm.org/D12170

llvm-svn: 246244
 2015-08-28 01:02:00 +00:00
Piotr Padlewski 63cc5d4627 Constant propagation after hiting llvm.assume 
After hitting @llvm.assume(X) we can:
- propagate equality that X == true
- if X is icmp/fcmp (with eq operation), and one of operand
  is constant we can change all variables with constants in the same BasicBlock

http://reviews.llvm.org/D11918

llvm-svn: 246243
 2015-08-28 01:01:57 +00:00
Justin Bogner 9f00ebaeda Revert "Constant propagation after hiting llvm.assume" 
This was also failing bootstrap:

http://lab.llvm.org:8080/green/job/clang-stage2-configure-Rlto_build

This reverts r245265.

llvm-svn: 245269
 2015-08-18 07:00:34 +00:00
Piotr Padlewski 94ca3783b8 Constant propagation after hiting llvm.assume 
After hitting @llvm.assume(X) we can:
- propagate equality that X == true
- if X is icmp/fcmp (with eq operation), and one of operand
  is constant we can change all variables with constants in the same BasicBlock

http://reviews.llvm.org/D11918

llvm-svn: 245265
 2015-08-18 03:55:30 +00:00