RuntimeLibcalls: Pass in exception handling type (llvm#144696)

All of the ABI options that influence libcall decisions need
to be passed in.

Author: arsenm

llvm/include/llvm/IR/RuntimeLibcalls.h

@@ -54,10 +54,12 @@ static inline auto libcalls() {
 
 /// A simple container for information about the supported runtime calls.
 struct RuntimeLibcallsInfo {
-  explicit RuntimeLibcallsInfo(const Triple &TT,
-                               FloatABI::ABIType FloatABI = FloatABI::Default,
-                               EABI EABIVersion = EABI::Default) {
-    initLibcalls(TT, FloatABI, EABIVersion);
+  explicit RuntimeLibcallsInfo(
+      const Triple &TT,
+      ExceptionHandling ExceptionModel = ExceptionHandling::None,
+      FloatABI::ABIType FloatABI = FloatABI::Default,
+      EABI EABIVersion = EABI::Default) {
+    initLibcalls(TT, ExceptionModel, FloatABI, EABIVersion);
   }
 
   /// Rename the default libcall routine name for the specified libcall.
@@ -147,8 +149,8 @@ struct RuntimeLibcallsInfo {
 
   /// Set default libcall names. If a target wants to opt-out of a libcall it
   /// should be placed here.
-  LLVM_ABI void initLibcalls(const Triple &TT, FloatABI::ABIType FloatABI,
-                             EABI ABIType);
+  LLVM_ABI void initLibcalls(const Triple &TT, ExceptionHandling ExceptionModel,
+                             FloatABI::ABIType FloatABI, EABI ABIType);
 };
 
 } // namespace RTLIB

llvm/lib/CodeGen/TargetLoweringBase.cpp

@@ -632,8 +632,8 @@ void RTLIB::initCmpLibcallCCs(ISD::CondCode *CmpLibcallCCs) {
 
 /// NOTE: The TargetMachine owns TLOF.
 TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm)
-    : TM(tm), Libcalls(TM.getTargetTriple(), TM.Options.FloatABIType,
-                       TM.Options.EABIVersion) {
+    : TM(tm), Libcalls(TM.getTargetTriple(), TM.Options.ExceptionModel,
+                       TM.Options.FloatABIType, TM.Options.EABIVersion) {
   initActions();
 
   // Perform these initializations only once.

llvm/lib/IR/RuntimeLibcalls.cpp

@@ -357,6 +357,7 @@ static void setLongDoubleIsF128Libm(RuntimeLibcallsInfo &Info,
 /// Set default libcall names. If a target wants to opt-out of a libcall it
 /// should be placed here.
 void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
+                                       ExceptionHandling ExceptionModel,
                                        FloatABI::ABIType FloatABI,
                                        EABI EABIVersion) {
   initSoftFloatCmpLibcallPredicates();
@@ -373,6 +374,11 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
   if (TT.isX86() && TT.isGNUEnvironment())
     setLongDoubleIsF128Libm(*this, /*FiniteOnlyFuncs=*/true);
 
+  if (TT.isX86() || TT.isVE()) {
+    if (ExceptionModel == ExceptionHandling::SjLj)
+      setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
+  }
+
   // For IEEE quad-precision libcall names, PPC uses "kf" instead of "tf".
   if (TT.isPPC()) {
     setLibcallName(RTLIB::ADD_F128, "__addkf3");

llvm/lib/Target/VE/VEISelLowering.cpp

@@ -298,8 +298,6 @@ void VETargetLowering::initSPUActions() {
   setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
   setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
   setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom);
-  if (TM.Options.ExceptionModel == ExceptionHandling::SjLj)
-    setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
   /// } SJLJ instructions
 
   // Intrinsic instructions

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -513,10 +513,6 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
   setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
   setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom);
 
-  // FIXME: This should be set in RuntimeLibcallsInfo
-  if (TM.Options.ExceptionModel == ExceptionHandling::SjLj)
-    setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
-
   // Darwin ABI issue.
   for (auto VT : { MVT::i32, MVT::i64 }) {
     if (VT == MVT::i64 && !Subtarget.is64Bit())