[lli] Revisit Orc debug output tests (#76822)

Integrate in-memory debug-info dumps into the `--orc-lazy-debug`
command-line option instead of exposing built-in functions to be called
from JITed code. This reduces overall amount of code (removing
`ExecutionUtils.cpp`) and seems cleaner anyway.

All existing items of `OrcDumpKind` work on IR level and run in the
IR-transform step of the JIT. The newly added `DumpDebugDescriptor` and
`DumpDebugObjects` must run after debug-registration and thus are
deferred to the Object-transform step of the JIT. This separation is the
major side-effect of the patch.

Author: weliveindetail

llvm/test/ExecutionEngine/OrcLazy/debug-descriptor-elf-minimal.ll renamed to llvm/test/ExecutionEngine/OrcLazy/debug-descriptor.ll

@@ -1,29 +1,17 @@
-; REQUIRES: native && x86_64-linux
+; REQUIRES: native && target-x86_64
 
-; RUN: lli --jit-linker=rtdyld \
-; RUN:     --generate=__dump_jit_debug_descriptor %s | FileCheck %s
+; RUN: lli --jit-linker=rtdyld --orc-lazy-debug=jit-debug-descriptor %s 2>&1 | FileCheck %s
+; RUN: lli --jit-linker=jitlink --orc-lazy-debug=jit-debug-descriptor %s 2>&1 | FileCheck %s
 ;
-; RUN: lli --jit-linker=jitlink \
-; RUN:     --generate=__dump_jit_debug_descriptor %s | FileCheck %s
+; Initial entry should be empty:
+; CHECK: jit_debug_descriptor 0x0000000000000000
 ;
-; CHECK: Reading __jit_debug_descriptor at 0x{{.*}}
-; CHECK: Version: 1
-; CHECK: Action: JIT_REGISTER_FN
-; CHECK:       Entry               Symbol File             Size  Previous Entry
-; CHECK: [ 0]  0x{{.*}}            0x{{.*}}              {{.*}}  0x0000000000000000
-
-target triple = "x86_64-unknown-unknown-elf"
-
-; Built-in symbol provided by the JIT
-declare void @__dump_jit_debug_descriptor(ptr)
-
-; Host-process symbol from the GDB JIT interface
-@__jit_debug_descriptor = external global i8, align 1
+; After adding the module it must not be empty anymore:
+; CHECK: jit_debug_descriptor 0x
+; CHECK-NOT:                    000000000000000
+; CHECK-SAME:                               {{[048c]}}
 
 define i32 @main() !dbg !9 {
-  %1 = alloca i32, align 4
-  store i32 0, ptr %1, align 4
-  call void @__dump_jit_debug_descriptor(ptr @__jit_debug_descriptor), !dbg !13
   ret i32 0, !dbg !14
 }
 

llvm/test/ExecutionEngine/OrcLazy/debug-objects-elf-minimal.ll

@@ -0,0 +1,62 @@
+; REQUIRES: native && x86_64-linux
+
+; In-memory debug-objects contain DWARF
+;
+; RUN: lli --jit-linker=rtdyld  --orc-lazy-debug=jit-debug-objects %s | llvm-dwarfdump --diff - | FileCheck %s
+; RUN: lli --jit-linker=jitlink --orc-lazy-debug=jit-debug-objects %s | llvm-dwarfdump --diff - | FileCheck %s
+;
+; CHECK: -:	file format elf64-x86-64
+; TODO: Synthesized Mach-O objects error out with:
+;       truncated or malformed object (offset field of section 8 in
+;       LC_SEGMENT_64 command 0 extends past the end of the file)
+;
+; CHECK: .debug_info contents:
+; CHECK: format = DWARF32
+; CHECK: DW_TAG_compile_unit
+; CHECK:               DW_AT_producer	("clang version 18.0.0git")
+; CHECK:               DW_AT_language	(DW_LANG_C11)
+; CHECK:               DW_AT_name	("source-file.c")
+; CHECK:               DW_AT_comp_dir	("/workspace")
+; CHECK:   DW_TAG_subprogram
+; CHECK:                 DW_AT_frame_base	(DW_OP_reg7 RSP)
+; CHECK:                 DW_AT_name	("main")
+; CHECK:                 DW_AT_decl_file	("/workspace/source-file.c")
+; CHECK:                 DW_AT_decl_line	(1)
+; CHECK:                 DW_AT_type	("int")
+; CHECK:                 DW_AT_external	(true)
+; CHECK:   DW_TAG_base_type
+; CHECK:                 DW_AT_name	("int")
+; CHECK:                 DW_AT_encoding	(DW_ATE_signed)
+; CHECK:                 DW_AT_byte_size	(0x04)
+; CHECK:   NULL
+
+; Text section of the in-memory debug-objects have non-null load-address
+;
+; RUN: lli --jit-linker=rtdyld --orc-lazy-debug=jit-debug-objects %s | \
+; RUN:                              llvm-objdump --section-headers - | \
+; RUN:                              FileCheck --check-prefix=CHECK_LOAD_ADDR %s
+; RUN: lli --jit-linker=jitlink --orc-lazy-debug=jit-debug-objects %s | \
+; RUN:                               llvm-objdump --section-headers - | \
+; RUN:                               FileCheck --check-prefix=CHECK_LOAD_ADDR %s
+;
+; CHECK_LOAD_ADDR:      .text
+; CHECK_LOAD_ADDR-NOT:  0000000000000000
+; CHECK_LOAD_ADDR-SAME: TEXT
+
+define i32 @main() !dbg !3 {
+entry:
+  ret i32 0, !dbg !8
+}
+
+!llvm.module.flags = !{!0}
+!llvm.dbg.cu = !{!2}
+
+!0 = !{i32 2, !"Debug Info Version", i32 3}
+!1 = !DIFile(filename: "source-file.c", directory: "/workspace")
+!2 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 18.0.0git", emissionKind: FullDebug)
+!3 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 1, type: !4, scopeLine: 1, unit: !2, retainedNodes: !7)
+!4 = !DISubroutineType(types: !5)
+!5 = !{!6}
+!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!7 = !{}
+!8 = !DILocation(line: 1, column: 14, scope: !3)

llvm/test/ExecutionEngine/OrcLazy/debug-objects.ll

@@ -53,7 +53,6 @@ endif( LLVM_USE_PERF )
 
 add_llvm_tool(lli
   lli.cpp
-  ExecutionUtils.cpp
 
   DEPENDS
   intrinsics_gen