Mark setjmp as "returns twice" and turn off SimpleCoalescing when called.

src/IceTargetLowering.cpp

 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the skeleton of the TargetLowering class,
@@ skipping 153 matching lines @@
     break;
   case Inst::Fcmp:
     lowerFcmp(llvm::dyn_cast<InstFcmp>(Inst));
     break;
   case Inst::Icmp:
     lowerIcmp(llvm::dyn_cast<InstIcmp>(Inst));
     break;
   case Inst::InsertElement:
     lowerInsertElement(llvm::dyn_cast<InstInsertElement>(Inst));
     break;
-  case Inst::IntrinsicCall:
-    lowerIntrinsicCall(llvm::dyn_cast<InstIntrinsicCall>(Inst));
+  case Inst::IntrinsicCall: {
+    InstIntrinsicCall *Call = llvm::dyn_cast<InstIntrinsicCall>(Inst);
+    if (Call->getIntrinsicInfo().ReturnsTwice)
+      setCallsReturnsTwice(true);
+    lowerIntrinsicCall(Call);
     break;
+  }
   case Inst::Load:
     lowerLoad(llvm::dyn_cast<InstLoad>(Inst));
     break;
   case Inst::Phi:
     lowerPhi(llvm::dyn_cast<InstPhi>(Inst));
     break;
   case Inst::Ret:
     lowerRet(llvm::dyn_cast<InstRet>(Inst));
     break;
   case Inst::Select:
@@ skipping 55 matching lines @@
   if (Target == Target_ARM64)
     return IceTargetGlobalInitARM64::create(Ctx);
 #endif
   llvm_unreachable("Unsupported target");
   return NULL;
 }
 
 TargetGlobalInitLowering::~TargetGlobalInitLowering() {}
 
 } // end of namespace Ice