From 0bccf9d60b2a7a33653e2fa18c6028c0546bbb61 Mon Sep 17 00:00:00 2001 From: Christian Konig Date: Sat, 16 Feb 2013 11:27:35 +0000 Subject: [PATCH] R600/structurizer: improve PHI value finding MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Using the new NearestCommonDominator class. This is a candidate for the stable branch. Signed-off-by: Christian König Reviewed-by: Tom Stellard llvm-svn: 175346 --- llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp b/llvm/lib/Target/R600/AMDGPUStructurizeCFG.cpp index 86cb04a..3801347 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) { -- 2.7.4