diff options
| 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 | 0bccf9d60b2a7a33653e2fa18c6028c0546bbb61 (patch) | |
| tree | d2c813c2bde6583d99e12569f5d3cff2a86859a2 /llvm/lib/Target | |
| parent | d08e3d753e401307b9a7c0316559cc8c1b39fd65 (diff) | |
| download | bcm5719-llvm-0bccf9d60b2a7a33653e2fa18c6028c0546bbb61.tar.gz bcm5719-llvm-0bccf9d60b2a7a33653e2fa18c6028c0546bbb61.zip | |
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>
llvm-svn: 175346
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp b/llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp index 86cb04aeb84..38013476188 100644 --- a/llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp +++ b/llvm/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) { |
