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Changed the liveness tracking in the RegisterScavenger

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to use register units instead of registers.

reviewed by Jakob Stoklund Olesen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214798 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pedro Artigas
2014-08-04 23:07:49 +00:00
parent db3ce56a58
commit 3da024594f
8 changed files with 116 additions and 114 deletions
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6
include/llvm/CodeGen/MachineRegisterInfo.h
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@ -516,8 +516,12 @@ public:
///
/// That function will return NULL if the virtual registers have incompatible
/// constraints.
///
/// Note that if ToReg is a physical register the function will replace and
/// apply sub registers to ToReg in order to obtain a final/proper physical
/// register.
void replaceRegWith(unsigned FromReg, unsigned ToReg);
/// getVRegDef - Return the machine instr that defines the specified virtual
/// register or null if none is found. This assumes that the code is in SSA
/// form, so there should only be one definition.