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| author | Cameron Zwarich <zwarich@apple.com> | 2011-02-22 00:46:22 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-02-22 00:46:22 +0000 |
| commit | 63a8dae64dea89ae4a6f93ee17cf3fbbc2815084 (patch) | |
| tree | eeca4d8a241a9374cdca2a8745d9955dd317889b /lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | |
| parent | d86f482e4a9d71596e4f81afb0f7912ab3e40a7f (diff) | |
| download | external_llvm-63a8dae64dea89ae4a6f93ee17cf3fbbc2815084.zip external_llvm-63a8dae64dea89ae4a6f93ee17cf3fbbc2815084.tar.gz external_llvm-63a8dae64dea89ae4a6f93ee17cf3fbbc2815084.tar.bz2 | |
Have isel visit blocks in reverse postorder rather than an undefined order. This
allows for the information propagated across basic blocks to be merged at phis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126169 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index ae63f2e..bbc62d8 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -49,6 +49,7 @@ #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/Timer.h" #include "llvm/Support/raw_ostream.h" +#include "llvm/ADT/PostOrderIterator.h" #include "llvm/ADT/Statistic.h" #include <algorithm> using namespace llvm; @@ -832,8 +833,10 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) { FastIS = TLI.createFastISel(*FuncInfo); // Iterate over all basic blocks in the function. - for (Function::const_iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) { - const BasicBlock *LLVMBB = &*I; + ReversePostOrderTraversal<const Function*> RPOT(&Fn); + for (ReversePostOrderTraversal<const Function*>::rpo_iterator + I = RPOT.begin(), E = RPOT.end(); I != E; ++I) { + const BasicBlock *LLVMBB = *I; #ifndef NDEBUG CheckLineNumbers(LLVMBB); #endif |