diff options
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 11 | ||||
| -rw-r--r-- | test/CodeGen/Thumb2/2009-08-07-CoalescerBug.ll | 16 |
2 files changed, 22 insertions, 5 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index b57bbc2ca5..5688d8d6cf 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -888,12 +888,13 @@ static void PropagateDeadness(LiveInterval &li, MachineInstr *CopyMI, MachineInstr *DefMI = li_->getInstructionFromIndex(li_->getDefIndex(LRStart)); if (DefMI && DefMI != CopyMI) { - int DeadIdx = DefMI->findRegisterDefOperandIdx(li.reg, false, tri_); - if (DeadIdx != -1) { + int DeadIdx = DefMI->findRegisterDefOperandIdx(li.reg, false); + if (DeadIdx != -1) DefMI->getOperand(DeadIdx).setIsDead(); - // A dead def should have a single cycle interval. - ++LRStart; - } + else + DefMI->addOperand(MachineOperand::CreateReg(li.reg, + true, true, false, true)); + ++LRStart; } } diff --git a/test/CodeGen/Thumb2/2009-08-07-CoalescerBug.ll b/test/CodeGen/Thumb2/2009-08-07-CoalescerBug.ll new file mode 100644 index 0000000000..4cd5b1e365 --- /dev/null +++ b/test/CodeGen/Thumb2/2009-08-07-CoalescerBug.ll @@ -0,0 +1,16 @@ +; RUN: llvm-as < %s | llc -mtriple=armv7-eabi -mattr=+vfp2 +; PR4686 + + %a = type { i32 (...)** } + %b = type { %a } + %c = type { float, float, float, float } + +declare arm_aapcs_vfpcc float @bar(%c*) + +define arm_aapcs_vfpcc void @foo(%b* %x, %c* %y) { +entry: + %0 = call arm_aapcs_vfpcc float @bar(%c* %y) ; <float> [#uses=0] + %1 = fadd float undef, undef ; <float> [#uses=1] + store float %1, float* undef, align 8 + ret void +} |