Add test for internal linkage with address taken regresstion test which also tests callback case.

Author: Prabhuk

llvm/test/CodeGen/ARM/call-graph-section-addrtaken.ll

@@ -0,0 +1,37 @@
+;; Test if a potential indirect call target function which has internal linkage and
+;; address taken has its type ID emitted to callgraph section.
+;; This test also makes sure that callback functions which meet the above constraint
+;; are handled correctly.
+
+; RUN: llc -mtriple=arm-unknown-linux --call-graph-section -o - < %s | FileCheck %s
+
+declare !type !0 void @_Z6doWorkPFviE(ptr)
+
+define i32 @_Z4testv() !type !1 {
+entry:
+  call void @_Z6doWorkPFviE(ptr nonnull @_ZL10myCallbacki)
+  ret i32 0
+}
+
+define internal void @_ZL10myCallbacki(i32 %value) !type !2 {
+entry:
+  %sink = alloca i32, align 4
+  store volatile i32 %value, ptr %sink, align 4
+  %i1 = load volatile i32, ptr %sink, align 4
+  ret void
+}
+
+!0 = !{i64 0, !"_ZTSFvPFviEE.generalized"}
+!1 = !{i64 0, !"_ZTSFivE.generalized"}
+!2 = !{i64 0, !"_ZTSFviE.generalized"}
+
+; CHECK: .section .callgraph,"o",%progbits,.text
+;; Version
+; CHECK-NEXT: .byte   0
+;; Flags -- Potential indirect target so LSB is set to 1. Other bits are 0.
+; CHECK-NEXT: .byte   1
+;; Function Entry PC
+; CHECK-NEXT: .long   [[LABEL_FUNC]]
+;; Function type ID -5212364466660467813
+; CHECK-NEXT: .long	1154849691
+; CHECK-NEXT: .long	3081369122

llvm/test/CodeGen/X86/call-graph-section-addrtaken.ll

@@ -0,0 +1,36 @@
+;; Test if a potential indirect call target function which has internal linkage and
+;; address taken has its type ID emitted to callgraph section.
+;; This test also makes sure that callback functions which meet the above constraint
+;; are handled correctly.
+
+; RUN: llc -mtriple=x86_64-unknown-linux --call-graph-section -o - < %s | FileCheck %s
+
+declare !type !0 void @_Z6doWorkPFviE(ptr)
+
+define i32 @_Z4testv() !type !1 {
+entry:
+  call void @_Z6doWorkPFviE(ptr nonnull @_ZL10myCallbacki)
+  ret i32 0
+}
+
+define internal void @_ZL10myCallbacki(i32 %value) !type !2 {
+entry:
+  %sink = alloca i32, align 4
+  store volatile i32 %value, ptr %sink, align 4
+  %i1 = load volatile i32, ptr %sink, align 4
+  ret void
+}
+
+!0 = !{i64 0, !"_ZTSFvPFviEE.generalized"}
+!1 = !{i64 0, !"_ZTSFivE.generalized"}
+!2 = !{i64 0, !"_ZTSFviE.generalized"}
+
+; CHECK: .section .callgraph,"o",@progbits,.text
+;; Version
+; CHECK-NEXT: .byte   0
+;; Flags -- Potential indirect target so LSB is set to 1. Other bits are 0.
+; CHECK-NEXT: .byte   1
+;; Function Entry PC
+; CHECK-NEXT: .quad   [[LABEL_FUNC]]
+;; Function type ID
+; CHECK-NEXT: .quad   -5212364466660467813