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| author | Justin Lebar <jlebar@google.com> | 2016-04-15 00:32:12 +0000 |
|---|---|---|
| committer | Justin Lebar <jlebar@google.com> | 2016-04-15 00:32:12 +0000 |
| commit | cf63b64fc645406939abdec1d8879c8bc8f24d0d (patch) | |
| tree | 112aa233249e19941700186cb5980277a9e505d7 | |
| parent | cad81cf6b3032d9956f4e772431bb499a74a9ddb (diff) | |
| download | bcm5719-llvm-cf63b64fc645406939abdec1d8879c8bc8f24d0d.tar.gz bcm5719-llvm-cf63b64fc645406939abdec1d8879c8bc8f24d0d.zip | |
[PM] Add a SpeculativeExecution pass for targets with divergent branches.
Summary:
This IR pass is helpful for GPUs, and other targets with divergent
branches. It's a nop on targets without divergent branches.
Reviewers: chandlerc
Subscribers: llvm-commits, jingyue, rnk, joker.eph, tra
Differential Revision: http://reviews.llvm.org/D18626
llvm-svn: 266399
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index 880dffa7a95..91b7dd0b52e 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -234,6 +234,8 @@ void PassManagerBuilder::addFunctionSimplificationPasses( else MPM.add(createScalarReplAggregatesPass(-1, false)); MPM.add(createEarlyCSEPass()); // Catch trivial redundancies + // Speculative execution if the target has divergent branches; otherwise nop. + MPM.add(createSpeculativeExecutionIfHasBranchDivergencePass()); MPM.add(createJumpThreadingPass()); // Thread jumps. MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals MPM.add(createCFGSimplificationPass()); // Merge & remove BBs |
