Adding a pass - RewritePNaClLibraryCalls, that replaces known library calls with stable bitcode int…

test/Transforms/NaCl/rewrite-longjmp-no-store.ll

Index: test/Transforms/NaCl/rewrite-longjmp-no-store.ll
diff --git a/test/Transforms/NaCl/rewrite-longjmp-no-store.ll b/test/Transforms/NaCl/rewrite-longjmp-no-store.ll
new file mode 100644
index 0000000000000000000000000000000000000000..fa2cd3b620598892c31d2dfcea0901b6e4c5907f
--- /dev/null
+++ b/test/Transforms/NaCl/rewrite-longjmp-no-store.ll
@@ -0,0 +1,13 @@
+; RUN: opt < %s -rewrite-pnacl-library-calls -S | FileCheck %s
+; Test that when there are no uses other than calls to longjmp,
+; no function body is generated.
+
+declare void @longjmp(i64*, i32)
+; CHECK-NOT: define{{.*}}@longjmp(i64* %env, i32 %val) {
+
+define void @call_longjmp(i64* %arg, i32 %num) {
+  call void @longjmp(i64* %arg, i32 %num)
+; CHECK: call void @llvm.nacl.longjmp(i8* %jmp_buf_i8, i32 %num)
+  ret void
+}
+