commit 4f28c1c71450c711e96aa283de53739d8b4504cd
author Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Jan 13 21:28:52 2011 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Jan 13 21:28:52 2011 +0000
tree 1dd3ac5b610ce2895b7a83a8f97a247f471e3f3a
parent 422578547e0e3464af7ae23305c54dd71a8bd9e9

Teach frame lowering to ignore debug values after the terminators.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCFrameLowering.cpp

diff --git a/lib/Target/PowerPC/PPCFrameLowering.cpp b/lib/Target/PowerPC/PPCFrameLowering.cpp
index 4c5b94d..6aca6b0 100644
--- a/lib/Target/PowerPC/PPCFrameLowering.cpp
+++ b/lib/Target/PowerPC/PPCFrameLowering.cpp
@@ -497,7 +497,8 @@
 
 void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
                                 MachineBasicBlock &MBB) const {
-  MachineBasicBlock::iterator MBBI = prior(MBB.end());
+  MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
+  assert(MBBI != MBB.end() && "Returning block has no terminator");
   const PPCInstrInfo &TII =
     *static_cast<const PPCInstrInfo*>(MF.getTarget().getInstrInfo());
 
@@ -676,29 +677,29 @@
           .addReg(TmpReg);
      }
   } else if (RetOpcode == PPC::TCRETURNdi) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     MachineOperand &JumpTarget = MBBI->getOperand(0);
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILB)).
       addGlobalAddress(JumpTarget.getGlobal(), JumpTarget.getOffset());
   } else if (RetOpcode == PPC::TCRETURNri) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     assert(MBBI->getOperand(0).isReg() && "Expecting register operand.");
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILBCTR));
   } else if (RetOpcode == PPC::TCRETURNai) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     MachineOperand &JumpTarget = MBBI->getOperand(0);
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILBA)).addImm(JumpTarget.getImm());
   } else if (RetOpcode == PPC::TCRETURNdi8) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     MachineOperand &JumpTarget = MBBI->getOperand(0);
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILB8)).
       addGlobalAddress(JumpTarget.getGlobal(), JumpTarget.getOffset());
   } else if (RetOpcode == PPC::TCRETURNri8) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     assert(MBBI->getOperand(0).isReg() && "Expecting register operand.");
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILBCTR8));
   } else if (RetOpcode == PPC::TCRETURNai8) {
-    MBBI = prior(MBB.end());
+    MBBI = MBB.getLastNonDebugInstr();
     MachineOperand &JumpTarget = MBBI->getOperand(0);
     BuildMI(MBB, MBBI, dl, TII.get(PPC::TAILBA8)).addImm(JumpTarget.getImm());
   }