[WinEH] Update exception pointer registers

Summary:
The CLR's personality routine passes these in rdx/edx, not rax/eax.

Make getExceptionPointerRegister a virtual method parameterized by
personality function to allow making this distinction.

Similarly make getExceptionSelectorRegister a virtual method parameterized
by personality function, for symmetry.


Reviewers: pgavlin, majnemer, rnk

Subscribers: jyknight, dsanders, llvm-commits

Differential Revision: http://reviews.llvm.org/D14344

llvm-svn: 252383

2 files changed, 14 insertions, 3 deletions

diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.cpp b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
index 6138f54352a..c496a3c5a11 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
@@ -1674,9 +1674,6 @@ SparcTargetLowering::SparcTargetLowering(TargetMachine &TM,
   setOperationAction(ISD::STACKRESTORE      , MVT::Other, Expand);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32  , Custom);
 
-  setExceptionPointerRegister(SP::I0);
-  setExceptionSelectorRegister(SP::I1);
-
   setStackPointerRegisterToSaveRestore(SP::O6);
 
   setOperationAction(ISD::CTPOP, MVT::i32,
diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.h b/llvm/lib/Target/Sparc/SparcISelLowering.h
index 6786b9e3cd3..4e46709cfc0 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.h
+++ b/llvm/lib/Target/Sparc/SparcISelLowering.h
@@ -89,6 +89,20 @@ namespace llvm {
       return MVT::i32;
     }
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+      return SP::I0;
+    }
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+      return SP::I1;
+    }
+
     /// getSetCCResultType - Return the ISD::SETCC ValueType
     EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
                            EVT VT) const override;