From 8042255118ddaf49ac940805b95f77eddecc70e5 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Thu, 12 Mar 2009 06:29:49 +0000 Subject: [PATCH] Enable Chris' value propagation change. It make available known sign, zero, one bits information for values that are live out of basic blocks. The goal is to eliminate unnecessary sext, zext, truncate of values that are live-in to blocks. This does not handle PHI nodes yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66777 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index e2b1c9edf38..fd2eb0655b2 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -52,8 +52,6 @@ #include using namespace llvm; -static cl::opt -EnableValueProp("enable-value-prop", cl::Hidden); static cl::opt DisableLegalizeTypes("disable-legalize-types", cl::Hidden); #ifndef NDEBUG @@ -644,7 +642,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() { if (ViewISelDAGs) CurDAG->viewGraph("isel input for " + BlockName); - if (!Fast && EnableValueProp) + if (!Fast) ComputeLiveOutVRegInfo(); // Third, instruction select all of the operations to machine code, adding the