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| author | Christian Konig <christian.koenig@amd.com> | 2013-02-16 11:27:35 +0000 |
|---|---|---|
| committer | Christian Konig <christian.koenig@amd.com> | 2013-02-16 11:27:35 +0000 |
| commit | 4c79c71d99336baf312e2784311b257c5d9eebce (patch) | |
| tree | 2d488127fbd7a9cd05f4d5bd4022f7222a890520 /lib/Target/R600 | |
| parent | f0e469bcaf65dddeadb5ccb400b4a712c5f763be (diff) | |
| download | external_llvm-4c79c71d99336baf312e2784311b257c5d9eebce.zip external_llvm-4c79c71d99336baf312e2784311b257c5d9eebce.tar.gz external_llvm-4c79c71d99336baf312e2784311b257c5d9eebce.tar.bz2 | |
R600/structurizer: improve PHI value finding
Using the new NearestCommonDominator class.
This is a candidate for the stable branch.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175346 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/R600')
| -rw-r--r-- | lib/Target/R600/AMDGPUStructurizeCFG.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/R600/AMDGPUStructurizeCFG.cpp b/lib/Target/R600/AMDGPUStructurizeCFG.cpp index 86cb04a..3801347 100644 --- a/lib/Target/R600/AMDGPUStructurizeCFG.cpp +++ b/lib/Target/R600/AMDGPUStructurizeCFG.cpp @@ -533,12 +533,18 @@ void AMDGPUStructurizeCFG::setPhiValues() { Updater.AddAvailableValue(&Func->getEntryBlock(), Undef); Updater.AddAvailableValue(To, Undef); + NearestCommonDominator Dominator(DT); + Dominator.addBlock(To, false); for (BBValueVector::iterator VI = PI->second.begin(), VE = PI->second.end(); VI != VE; ++VI) { Updater.AddAvailableValue(VI->first, VI->second); + Dominator.addBlock(VI->first); } + if (!Dominator.wasResultExplicitMentioned()) + Updater.AddAvailableValue(Dominator.getResult(), Undef); + for (BBVector::iterator FI = From.begin(), FE = From.end(); FI != FE; ++FI) { |