[GCC] Attribute ifunc support in llvm
This patch add support for GCC attribute((ifunc("resolver"))) for
targets that use ELF as object file format. In general ifunc is a
special kind of function alias with type @gnu_indirect_function. Patch
for Clang http://reviews.llvm.org/D15524
Differential Revision: http://reviews.llvm.org/D15525
llvm-svn: 265667
diff --git a/llvm/test/Assembler/ifunc-use-list-order.ll b/llvm/test/Assembler/ifunc-use-list-order.ll
new file mode 100644
index 0000000..efd8dcc
--- /dev/null
+++ b/llvm/test/Assembler/ifunc-use-list-order.ll
@@ -0,0 +1,42 @@
+; RUN: verify-uselistorder < %s
+
+; Global referencing ifunc.
+@ptr_foo = global void ()* @foo_ifunc
+
+; Alias for ifunc.
+@alias_foo = alias void (), void ()* @foo_ifunc
+
+@foo_ifunc = ifunc void (), i8* ()* @foo_resolver
+
+define i8* @foo_resolver() {
+entry:
+ ret i8* null
+}
+
+; Function referencing ifunc.
+define void @bar() {
+entry:
+ call void @foo_ifunc()
+ ret void
+}
+
+; Global referencing function.
+@ptr_bar = global void ()* @bar
+
+; Alias for function.
+@alias_bar = alias void (), void ()* @bar
+
+@bar_ifunc = ifunc void (), i8* ()* @bar2_ifunc
+@bar2_ifunc = ifunc i8* (), i8* ()* @bar_resolver
+
+define i8* @bar_resolver() {
+entry:
+ ret i8* null
+}
+
+; Function referencing bar.
+define void @bar2() {
+entry:
+ call void @bar()
+ ret void
+}