diff options
| author | Andrew Trick <atrick@apple.com> | 2012-02-21 04:51:23 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-02-21 04:51:23 +0000 |
| commit | 19273aec441411b4d571fdb87c6daa0fbe7a33a0 (patch) | |
| tree | ea01b1d19560a814c4686c3edebacac5b9e40f06 /include/llvm/CodeGen | |
| parent | e8ccb049136506cb71b84a55000bad3c1440ee7c (diff) | |
Clear virtual registers after they are no longer referenced.
Passes after RegAlloc should be able to rely on MRI->getNumVirtRegs() == 0.
This makes sharing code for pre/postRA passes more robust.
Now, to check if a pass is running before the RA pipeline begins, use MRI->isSSA().
To check if a pass is running after the RA pipeline ends, use !MRI->getNumVirtRegs().
PEI resets virtual regs when it's done scavenging.
PTX will either have to provide its own PEI pass or assign physregs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151032 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen')
| -rw-r--r-- | include/llvm/CodeGen/MachineRegisterInfo.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h index 51c71b724c..36fac85b46 100644 --- a/include/llvm/CodeGen/MachineRegisterInfo.h +++ b/include/llvm/CodeGen/MachineRegisterInfo.h @@ -273,6 +273,9 @@ public: /// unsigned getNumVirtRegs() const { return VRegInfo.size(); } + /// clearVirtRegs - Remove all virtual registers (after physreg assignment). + void clearVirtRegs(); + /// setRegAllocationHint - Specify a register allocation hint for the /// specified virtual register. void setRegAllocationHint(unsigned Reg, unsigned Type, unsigned PrefReg) { |