Add MCJIT test case for running global constructors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168149 91177308-0d34-0410-b5e6-96231b3b80d8

test/ExecutionEngine/MCJIT/test-global-ctors.ll

@@ -0,0 +1,21 @@
+; RUN: %lli -mtriple=%mcjit_triple -use-mcjit %s > /dev/null
+@var = global i32 1, align 4
+@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @ctor_func }]
+@llvm.global_dtors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @dtor_func }]
+
+define i32 @main() nounwind {
+entry:
+  %0 = load i32* @var, align 4
+  ret i32 %0
+}
+
+define internal void @ctor_func() section ".text.startup" {
+entry:
+  store i32 0, i32* @var, align 4
+  ret void
+}
+
+define internal void @dtor_func() section ".text.startup" {
+entry:
+  ret void
+}