In Dwarf 3 (and Dwarf 2) attributes whose value are offsets into a
section use the form DW_FORM_data4 whilst in Dwarf 4 and later they
use the form DW_FORM_sec_offset.
This patch updates the places where such attributes are generated to
use the appropriate form depending on the Dwarf version. The DIE entries
affected have the following tags:
DW_AT_stmt_list, DW_AT_ranges, DW_AT_location, DW_AT_GNU_pubnames,
DW_AT_GNU_pubtypes, DW_AT_GNU_addr_base, DW_AT_GNU_ranges_base
It also adds a hidden command line option "--dwarf-version=<uint>"
to llc which allows the version of Dwarf to be generated to override
what is specified in the metadata; this makes it possible to update
existing tests to check the debugging information generated for both
Dwarf 4 (the default) and Dwarf 3 using the same metadata.
Patch (slightly modified) by Keith Walker!
llvm-svn: 195391
diff --git a/llvm/test/DebugInfo/X86/stmt-list-multiple-compile-units.ll b/llvm/test/DebugInfo/X86/stmt-list-multiple-compile-units.ll
index d43d347..61cfd52 100644
--- a/llvm/test/DebugInfo/X86/stmt-list-multiple-compile-units.ll
+++ b/llvm/test/DebugInfo/X86/stmt-list-multiple-compile-units.ll
@@ -1,16 +1,18 @@
; RUN: llc -O0 %s -mtriple=x86_64-apple-darwin -filetype=obj -o %t
; RUN: llvm-dwarfdump %t | FileCheck %s
+; RUN: llc -O0 %s -mtriple=x86_64-apple-darwin -filetype=obj -o %t -dwarf-version=3
+; RUN: llvm-dwarfdump %t | FileCheck %s -check-prefix=DWARF3
; RUN: llc < %s -O0 -mtriple=x86_64-apple-macosx10.7 | FileCheck %s -check-prefix=ASM
; rdar://13067005
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
-; CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
+; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
-; CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x0000003c)
+; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x0000003c)
; CHECK: .debug_line contents:
; CHECK-NEXT: Line table prologue:
@@ -21,6 +23,24 @@
; CHECK: file_names[ 1] 0 0x00000000 0x00000000 simple2.c
; CHECK-NOT: file_names
+; DWARF3: .debug_info contents:
+; DWARF3: DW_TAG_compile_unit
+; DWARF3: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
+; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
+
+; DWARF3: DW_TAG_compile_unit
+; DWARF3: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
+; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x0000003c)
+
+; DWARF3: .debug_line contents:
+; DWARF3-NEXT: Line table prologue:
+; DWARF3-NEXT: total_length: 0x00000038
+; DWARF3: file_names[ 1] 0 0x00000000 0x00000000 simple.c
+; DWARF3: Line table prologue:
+; DWARF3-NEXT: total_length: 0x00000039
+; DWARF3: file_names[ 1] 0 0x00000000 0x00000000 simple2.c
+; DWARF3-NOT: file_names
+
; PR15408
; ASM: L__DWARF__debug_info_begin0:
; ASM: .long 0 ## DW_AT_stmt_list