Implement frame unwinding information emission for Thumb1. Not finished yet because there is no way given the constpool index to examine the actual entry: the reason is clones inserted by constant island pass, which are not tracked at all! The only connection is done during asmprinting time via magic label names which is really gross and needs to be eventually fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127104 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 8 deletions

diff --git a/lib/Target/ARM/Thumb2RegisterInfo.cpp b/lib/Target/ARM/Thumb2RegisterInfo.cpp
index 099b8f7241..ce8edbe30a 100644
--- a/lib/Target/ARM/Thumb2RegisterInfo.cpp
+++ b/lib/Target/ARM/Thumb2RegisterInfo.cpp
@@ -42,13 +42,14 @@ Thumb2RegisterInfo::Thumb2RegisterInfo(const ARMBaseInstrInfo &tii,
 
 /// emitLoadConstPool - Emits a load from constpool to materialize the
 /// specified immediate.
-void Thumb2RegisterInfo::emitLoadConstPool(MachineBasicBlock &MBB,
-                                           MachineBasicBlock::iterator &MBBI,
-                                           DebugLoc dl,
-                                           unsigned DestReg, unsigned SubIdx,
-                                           int Val,
-                                           ARMCC::CondCodes Pred,
-                                           unsigned PredReg) const {
+void
+Thumb2RegisterInfo::emitLoadConstPool(MachineBasicBlock &MBB,
+                                      MachineBasicBlock::iterator &MBBI,
+                                      DebugLoc dl,
+                                      unsigned DestReg, unsigned SubIdx,
+                                      int Val,
+                                      ARMCC::CondCodes Pred, unsigned PredReg,
+                                      unsigned MIFlags) const {
   MachineFunction &MF = *MBB.getParent();
   MachineConstantPool *ConstantPool = MF.getConstantPool();
   const Constant *C = ConstantInt::get(
@@ -57,5 +58,6 @@ void Thumb2RegisterInfo::emitLoadConstPool(MachineBasicBlock &MBB,
 
   BuildMI(MBB, MBBI, dl, TII.get(ARM::t2LDRpci))
     .addReg(DestReg, getDefRegState(true), SubIdx)
-    .addConstantPoolIndex(Idx).addImm((int64_t)ARMCC::AL).addReg(0);
+    .addConstantPoolIndex(Idx).addImm((int64_t)ARMCC::AL).addReg(0)
+    .setMIFlags(MIFlags);
 }