Extend RemapInstruction and friends to take an optional new parameter, a ValueMaterializer.
Extend LinkModules to pass a ValueMaterializer to RemapInstruction and friends to lazily create Functions for lazily linked globals. This is a big win when linking small modules with large (mostly unused) library modules.
llvm-svn: 182776
diff --git a/llvm/test/Linker/transitive-lazy-link.ll b/llvm/test/Linker/transitive-lazy-link.ll
new file mode 100644
index 0000000..32b9d21
--- /dev/null
+++ b/llvm/test/Linker/transitive-lazy-link.ll
@@ -0,0 +1,15 @@
+; @f and @g are lazily linked. @f requires @g - ensure @g is correctly linked.
+
+; RUN: echo -e "declare i32 @f(i32)\ndefine i32 @h(i32 %x) {\n%1 = call i32 @f(i32 %x)\nret i32 %1\n}" | llvm-as >%t.1.bc
+; RUN: llvm-as < %s > %t.2.bc
+; RUN: llvm-link %t.1.bc %t.2.bc
+
+define available_externally i32 @f(i32 %x) {
+ %1 = call i32 @g(i32 %x)
+ ret i32 %1
+}
+
+define available_externally i32 @g(i32 %x) {
+ ret i32 5
+}
+