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Add the PPCCTRLoops pass: a PPC machine-code-level optimization pass to form CTR-based loop branching code.

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This pass is derived from the Hexagon HardwareLoops pass. The only significant enhancement over the Hexagon
pass is that PPCCTRLoops will also attempt to delete the replaced add and compare operations if they are
no longer otherwise used. Also, invalid preheader DebugLoc is not used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158204 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2012-06-08 15:38:21 +00:00
parent 69938a85bd
commit 99f823f943
10 changed files with 890 additions and 18 deletions
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lib/Target/PowerPC/PPC.h
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@@ -30,6 +30,7 @@ namespace llvm {
class AsmPrinter;
class MCInst;
FunctionPass *createPPCCTRLoops();
FunctionPass *createPPCBranchSelectionPass();
FunctionPass *createPPCISelDag(PPCTargetMachine &TM);
FunctionPass *createPPCJITCodeEmitterPass(PPCTargetMachine &TM,