Add variants of the dispatchsetup pseudo for Thumb and !VFP. <rdar://10620138>

My change r146949 added register clobbers to the eh_sjlj_dispatchsetup pseudo
instruction, but on Thumb1 some of those registers cannot be used.  This
caused massive failures on the testsuite when compiling for Thumb1.  While
fixing that, I noticed that the eh_sjlj_setjmp instruction has a "nofp"
variant, and I realized that dispatchsetup needs the same thing, so I have
added that as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147204 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 23 insertions, 7 deletions

diff --git a/lib/Target/ARM/ARMExpandPseudoInsts.cpp b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
index 1fb769754c..35f3c25500 100644
--- a/lib/Target/ARM/ARMExpandPseudoInsts.cpp
+++ b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
@@ -842,7 +842,9 @@ bool ARMExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
       MI.eraseFromParent();
       return true;
     }
-    case ARM::eh_sjlj_dispatchsetup: {
+    case ARM::Int_eh_sjlj_dispatchsetup:
+    case ARM::Int_eh_sjlj_dispatchsetup_nofp:
+    case ARM::tInt_eh_sjlj_dispatchsetup: {
       MachineFunction &MF = *MI.getParent()->getParent();
       const ARMBaseInstrInfo *AII =
         static_cast<const ARMBaseInstrInfo*>(TII);
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index c6c1f5be93..2482f4e27a 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -5792,7 +5792,12 @@ EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
                              MachineMemOperand::MOLoad |
                              MachineMemOperand::MOVolatile, 4, 4);
 
-  BuildMI(DispatchBB, dl, TII->get(ARM::eh_sjlj_dispatchsetup));
+  if (AFI->isThumb1OnlyFunction())
+    BuildMI(DispatchBB, dl, TII->get(ARM::tInt_eh_sjlj_dispatchsetup));
+  else if (!Subtarget->hasVFP2())
+    BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup_nofp));
+  else 
+    BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
 
   unsigned NumLPads = LPadList.size();
   if (Subtarget->isThumb2()) {
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 6624d5c5f1..7e1a8ddf25 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -4737,15 +4737,20 @@ def Int_eh_sjlj_longjmp : PseudoInst<(outs), (ins GPR:$src, GPR:$scratch),
                                 Requires<[IsARM, IsIOS]>;
 }
 
-// eh.sjlj.dispatchsetup pseudo-instruction.
-// This pseudo is used for ARM, Thumb1 and Thumb2. Any differences are
+// eh.sjlj.dispatchsetup pseudo-instructions.
+// These pseudos are used for both ARM and Thumb2. Any differences are
 // handled when the pseudo is expanded (which happens before any passes
 // that need the instruction size).
 let Defs =
   [ R0,  R1,  R2,  R3,  R4,  R5,  R6,  R7,  R8,  R9,  R10, R11, R12, LR, CPSR,
-    QQQQ0, QQQQ1, QQQQ2, QQQQ3 ], isBarrier = 1 in {
-  def eh_sjlj_dispatchsetup : PseudoInst<(outs), (ins), NoItinerary, []>;
-}
+    QQQQ0, QQQQ1, QQQQ2, QQQQ3 ], isBarrier = 1 in
+def Int_eh_sjlj_dispatchsetup : PseudoInst<(outs), (ins), NoItinerary, []>;
+
+let Defs =
+  [ R0,  R1,  R2,  R3,  R4,  R5,  R6,  R7,  R8,  R9,  R10, R11, R12, LR, CPSR ],
+  isBarrier = 1 in
+def Int_eh_sjlj_dispatchsetup_nofp : PseudoInst<(outs), (ins), NoItinerary, []>;
+
 
 //===----------------------------------------------------------------------===//
 // Non-Instruction Patterns
diff --git a/lib/Target/ARM/ARMInstrThumb.td b/lib/Target/ARM/ARMInstrThumb.td
index 9c1e4bb3a0..8238ff065f 100644
--- a/lib/Target/ARM/ARMInstrThumb.td
+++ b/lib/Target/ARM/ARMInstrThumb.td
@@ -1271,6 +1271,10 @@ def tInt_eh_sjlj_longjmp : XI<(outs), (ins GPR:$src, GPR:$scratch),
                               [(ARMeh_sjlj_longjmp GPR:$src, GPR:$scratch)]>,
                              Requires<[IsThumb, IsIOS]>;
 
+let Defs = [ R0,  R1,  R2,  R3,  R4,  R5,  R6,  R7, R12, CPSR ],
+    isBarrier = 1 in
+def tInt_eh_sjlj_dispatchsetup : PseudoInst<(outs), (ins), NoItinerary, []>;
+
 //===----------------------------------------------------------------------===//
 // Non-Instruction Patterns
 //