diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2009-03-12 06:29:49 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-03-12 06:29:49 +0000 |
| commit | 8042255118ddaf49ac940805b95f77eddecc70e5 (patch) | |
| tree | e691e2d5a4262c164a995773a5dbc99508343ee7 /lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | |
| parent | 536e66764b93fd1368ce4d1f753cbe909c05b62d (diff) | |
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
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index e2b1c9edf3..fd2eb0655b 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -53,8 +53,6 @@ using namespace llvm; static cl::opt<bool> -EnableValueProp("enable-value-prop", cl::Hidden); -static cl::opt<bool> DisableLegalizeTypes("disable-legalize-types", cl::Hidden); #ifndef NDEBUG static cl::opt<bool> @@ -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 |