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Don't recalculate the loop info and loop dominators analyses if they're

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preserved.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45596 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2008-01-04 20:54:55 +00:00
parent b670a1737b
commit 67d65bb69d
8 changed files with 34 additions and 6 deletions
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8
include/llvm/CodeGen/Passes.h
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@ -38,6 +38,14 @@ namespace llvm {
FunctionPass *createMachineFunctionPrinterPass(std::ostream *OS,
const std::string &Banner ="");
/// MachineLoopInfo pass - This pass is a loop analysis pass.
///
extern const PassInfo *MachineLoopInfoID;
/// MachineDominators pass - This pass is a machine dominators analysis pass.
///
extern const PassInfo *MachineDominatorsID;
/// PHIElimination pass - This pass eliminates machine instruction PHI nodes
/// by inserting copy instructions. This destroys SSA information, but is the
/// desired input for some register allocators. This pass is "required" by