From e7ccd4acd2ee9753e6d212efd522be5c7de154d7 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 9 Apr 2005 03:30:29 +0000 Subject: [PATCH] Emit BRCONDTWOWAY when possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21167 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 7c347d0526a..bfceecb7aaf 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -430,7 +430,6 @@ void SelectionDAGLowering::visitBr(BranchInst &I) { MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; SDOperand Cond = getValue(I.getCondition()); - if (Succ1MBB == NextBlock) { // If the condition is false, fall through. This means we should branch // if the condition is true to Succ #0. @@ -444,12 +443,12 @@ void SelectionDAGLowering::visitBr(BranchInst &I) { DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), Cond, DAG.getBasicBlock(Succ1MBB))); } else { - // Neither edge is a fall through. If the comparison is true, jump to - // Succ#0, otherwise branch unconditionally to succ #1. - DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), - Cond, DAG.getBasicBlock(Succ0MBB))); - DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), - DAG.getBasicBlock(Succ1MBB))); + std::vector Ops; + Ops.push_back(getRoot()); + Ops.push_back(Cond); + Ops.push_back(DAG.getBasicBlock(Succ0MBB)); + Ops.push_back(DAG.getBasicBlock(Succ1MBB)); + DAG.setRoot(DAG.getNode(ISD::BRCONDTWOWAY, MVT::Other, Ops)); } } }