diff options
| author | ckoenig <ckoenig@91177308-0d34-0410-b5e6-96231b3b80d8> | 2013-02-16 11:27:35 +0000 |
|---|---|---|
| committer | Tom Stellard <thomas.stellard@amd.com> | 2013-02-19 14:58:29 +0000 |
| commit | 6ed8c0f164e977a4d298f5abc3a587178e14caab (patch) | |
| tree | 6f05165e8d05416b03228de1f2d973dc6bffae8e | |
| parent | ba7b51db0d356d51c32aef0240603f2dc1e552da (diff) | |
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
(cherry picked from commit fe8baf459f6e9f52ef8e5cc630e567f38ad196fa)
| -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 ad628c16858..eb63e556209 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) { |