[Sparc] Implement __builtin_setjmp, __builtin_longjmp back-end.

This code implements builtin_setjmp and builtin_longjmp exception handling intrinsics for 32-bit Sparc back-ends.

The code started as a mash-up of the PowerPC and X86 versions, although there are sufficient differences to both that had to be made for Sparc handling.

Note: I have manual tests running. I'll work on a unit test and add that to the rest of this diff in the next day.

Also, this implementation is only for 32-bit Sparc. I haven't focussed on a 64-bit version, although I have left the code in a prepared state for implementing this, including detecting pointer size and comments indicating where I suspect there may be differences.

Differential Revision: http://reviews.llvm.org/D19798

llvm-svn: 268483

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 1df35ab8465..6b26d14dc5a 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -6447,6 +6447,10 @@ public:
       }
     }
   }
+
+  bool hasSjLjLowering() const override {
+    return true;
+  }
 };
 
 // SPARCV8el is the 32-bit little-endian mode selected by Triple::sparcel.