diff options
Diffstat (limited to 'lib/CodeGen/CriticalAntiDepBreaker.cpp')
| -rw-r--r-- | lib/CodeGen/CriticalAntiDepBreaker.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/CriticalAntiDepBreaker.cpp b/lib/CodeGen/CriticalAntiDepBreaker.cpp index 98d4d41320..335d2d8e9b 100644 --- a/lib/CodeGen/CriticalAntiDepBreaker.cpp +++ b/lib/CodeGen/CriticalAntiDepBreaker.cpp @@ -330,6 +330,8 @@ CriticalAntiDepBreaker::findSuitableFreeRegister(MachineInstr *MI, for (TargetRegisterClass::iterator R = RC->allocation_order_begin(MF), RE = RC->allocation_order_end(MF); R != RE; ++R) { unsigned NewReg = *R; + // Don't consider non-allocatable registers + if (!AllocatableSet.test(NewReg)) continue; // Don't replace a register with itself. if (NewReg == AntiDepReg) continue; // Don't replace a register with one that was recently used to repair |