diff options
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64A57FPLoadBalancing.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64A57FPLoadBalancing.cpp b/llvm/lib/Target/AArch64/AArch64A57FPLoadBalancing.cpp index 2503764a852..d4c742bb449 100644 --- a/llvm/lib/Target/AArch64/AArch64A57FPLoadBalancing.cpp +++ b/llvm/lib/Target/AArch64/AArch64A57FPLoadBalancing.cpp @@ -481,10 +481,16 @@ int AArch64A57FPLoadBalancing::scavengeRegister(Chain *G, Color C, RS.forward(I); AvailableRegs &= RS.getRegsAvailable(TRI->getRegClass(RegClassID)); - // Remove any registers clobbered by a regmask. + // Remove any registers clobbered by a regmask or any def register that is + // immediately dead. for (auto J : I->operands()) { if (J.isRegMask()) AvailableRegs.clearBitsNotInMask(J.getRegMask()); + + if (J.isReg() && J.isDef() && AvailableRegs[J.getReg()]) { + assert(J.isDead() && "Non-dead def should have been removed by now!"); + AvailableRegs.reset(J.getReg()); + } } } |
