[clang] [llvm] [llvm][AsmPrinter] Emit call graph section (PR #87576)

[Prabhu Rajasekaran via llvm-commits]

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@@ -0,0 +1,58 @@
+/// Test the callgraph section to make sure the indirect callsites
+/// (annotated by generated temporary labels .Ltmp*) are associated
+/// with the corresponding callee type identifiers.
+
+// RUN: llvm-mc -triple=x86_64 -filetype=obj -o - < %s | llvm-readelf -x .callgraph - | FileCheck %s
+	
+	.text
+	.globl	ball                            # -- Begin function ball
+	.p2align	4
+	.type	ball, at function
+ball:                                   # @ball
+.Lfunc_begin0:	
+# %bb.0:                                # %entry
+	pushq	%rbx	
+	subq	$32, %rsp	
+	movl	$0, 4(%rsp)
+	movq	foo at GOTPCREL(%rip), %rcx
+	movq	%rcx, 24(%rsp)
+	xorl	%eax, %eax
+	callq	*%rcx
+.Ltmp0:
+	movq	bar at GOTPCREL(%rip), %rax
+	movq	%rax, 16(%rsp)
+	movsbl	3(%rsp), %edi
+	callq	*%rax
+.Ltmp1:
+	movq	baz at GOTPCREL(%rip), %rax
+	movq	%rax, 8(%rsp)
+	leaq	3(%rsp), %rbx
+	movq	%rbx, %rdi
+	callq	*%rax
+.Ltmp2:
+	callq	foo at PLT
+	movsbl	3(%rsp), %edi
+	callq	bar at PLT
+	movq	%rbx, %rdi
+	callq	baz at PLT
+	addq	$32, %rsp	
+	popq	%rbx	
+	retq
+	.section	.callgraph,"o", at progbits,.text
+	.quad	0
+	.quad	.Lfunc_begin0
+	.quad	1
+	.quad	3
+	/// MD5 hash of the callee type ID for foo.
+    // CHECK: 2444f731 f5eecb3e
+	.quad	0x3ecbeef531f74424
+	.quad	.Ltmp0
+	/// MD5 hash of the callee type ID for bar.
+    // CHECK: 5486bc59 814b8e30
+	.quad	0x308e4b8159bc8654
+	.quad	.Ltmp1
+	/// MD5 hash of the callee type ID for baz.
+    // CHECK: 7ade6814 f897fd77
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Prabhuk wrote:

Done. Thank you. PTAL.

https://github.com/llvm/llvm-project/pull/87576