Support @llvm.nacl.{set|long}jmp intrinsics by translating them to library calls

This is similar to the way @llvm.{set|long}jmp are handled.

The previously defined nacl-specific intrinsics are no longer used
and are overridden.

For the library call, call setjmp/longjmp without a preceding
underscore as these symbols exist in our runtime support code
(pnacl/support/setjmp_XXX.S)

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3429
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/14715018

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index b7a7e2e133..9113fb1b6f 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -5215,6 +5215,13 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
     setValue(&I, DAG.getNode(ISD::NACL_TARGET_ARCH, dl, DestVT));
     return 0;
   }
+  // Native Client Intrinsics for setjmp/longjmp
+  case Intrinsic::nacl_setjmp: {
+    return "setjmp";
+  }
+  case Intrinsic::nacl_longjmp: {
+    return "longjmp";
+  }
   // @LOCALMOD-END
   }
 }