1 files changed, 32 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 88b6a2f..e8984e1 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3277,6 +3277,38 @@ let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1 in {
                  Requires<[IsThumb2, IsIOS]>;
 }
 
+let isCall = 1,
+  // On non-IOS platforms R9 is callee-saved.
+  Defs = [LR], Uses = [SP] in {
+  // mov lr, pc; b if callee is marked noreturn to avoid confusing the
+  // return stack predictor.
+  def t2BMOVPCB_CALL : tPseudoInst<(outs),
+                                   (ins t_bltarget:$func, variable_ops),
+                               6, IIC_Br, [(ARMcall_nolink tglobaladdr:$func)]>,
+                        Requires<[IsThumb, IsNotIOS]>;
+}
+
+let isCall = 1,
+  // On IOS R9 is call-clobbered.
+  // R7 is marked as a use to prevent frame-pointer assignments from being
+  // moved above / below calls.
+  Defs = [LR], Uses = [R7, SP] in {
+  // mov lr, pc; b if callee is marked noreturn to avoid confusing the
+  // return stack predictor.
+  def t2BMOVPCBr9_CALL : tPseudoInst<(outs),
+                                     (ins t_bltarget:$func, variable_ops),
+                               6, IIC_Br, [(ARMcall_nolink tglobaladdr:$func)]>,
+                        Requires<[IsThumb, IsIOS]>;
+}
+
+// Direct calls
+def : T2Pat<(ARMcall_nolink texternalsym:$func),
+            (t2BMOVPCB_CALL texternalsym:$func)>,
+      Requires<[IsThumb, IsNotIOS]>;
+def : T2Pat<(ARMcall_nolink texternalsym:$func),
+            (t2BMOVPCBr9_CALL texternalsym:$func)>,
+      Requires<[IsThumb, IsIOS]>;
+
 // IT block
 let Defs = [ITSTATE] in
 def t2IT : Thumb2XI<(outs), (ins it_pred:$cc, it_mask:$mask),