Re-apply r278065 (Weak symbol support in RuntimeDyld) with a fix for ELF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278149 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 35 insertions, 0 deletions

diff --git a/test/ExecutionEngine/MCJIT/Inputs/weak-function-2.ll b/test/ExecutionEngine/MCJIT/Inputs/weak-function-2.ll
new file mode 100644
index 000000000000..a7ff83df0398
--- /dev/null
+++ b/test/ExecutionEngine/MCJIT/Inputs/weak-function-2.ll
@@ -0,0 +1,9 @@
+define linkonce_odr i32 @baz() #0 {
+entry:
+  ret i32 0
+}
+
+define i8* @bar() {
+entry:
+  ret i8* bitcast (i32 ()* @baz to i8*)
+}
diff --git a/test/ExecutionEngine/MCJIT/weak-function.ll b/test/ExecutionEngine/MCJIT/weak-function.ll
new file mode 100644
index 000000000000..562d6ade33b3
--- /dev/null
+++ b/test/ExecutionEngine/MCJIT/weak-function.ll
@@ -0,0 +1,26 @@
+; RUN: lli -jit-kind=mcjit -extra-module %p/Inputs/weak-function-2.ll %s
+;
+; Check that functions in two different modules agree on the address of weak
+; function 'baz'
+
+define linkonce_odr i32 @baz() {
+entry:
+  ret i32 0
+}
+
+define i8* @foo() {
+entry:
+  ret i8* bitcast (i32 ()* @baz to i8*)
+}
+
+declare i8* @bar()
+
+define i32 @main(i32 %argc, i8** %argv) {
+entry:
+  %call = tail call i8* @foo()
+  %call1 = tail call i8* @bar()
+  %cmp = icmp ne i8* %call, %call1
+  %conv = zext i1 %cmp to i32
+  ret i32 %conv
+}
+