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Fix PR5024. LiveVariables physical register defs should *commit* only after all

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of the defs are processed.
Also fix a implicit_def propagation bug: a implicit_def of a physical register
should be applied to uses of the sub-registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82616 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-09-23 06:28:31 +00:00
parent f7cd853071
commit 296925dc16
4 changed files with 125 additions and 33 deletions
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6
include/llvm/CodeGen/LiveVariables.h
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@@ -149,7 +149,11 @@ private: // Intermediate data structures
bool HandlePhysRegKill(unsigned Reg, MachineInstr *MI);
void HandlePhysRegUse(unsigned Reg, MachineInstr *MI);
void HandlePhysRegDef(unsigned Reg, MachineInstr *MI);
void HandlePhysRegDef(unsigned Reg, MachineInstr *MI,
SmallVector<unsigned, 4> &Defs,
SmallVector<unsigned, 4> &SuperDefs);
void UpdatePhysRegDefs(MachineInstr *MI, SmallVector<unsigned, 4> &Defs);
void UpdateSuperRegDefs(MachineInstr *MI, SmallVector<unsigned, 4> &Defs);
/// FindLastPartialDef - Return the last partial def of the specified register.
/// Also returns the sub-registers that're defined by the instruction.