Emit DW_LLE_base_address + DW_LLE_offset_pair for DWARF v5
authorShubham Sandeep Rastogi <srastogi22@apple.com>
Wed, 14 Jun 2023 23:35:38 +0000 (16:35 -0700)
committerShubham Sandeep Rastogi <srastogi22@apple.com>
Wed, 21 Jun 2023 19:43:29 +0000 (12:43 -0700)
This patch tries to reduce the size of the debug_loclist section by
replacing the DW_LLE_start_length opcodes currently emitted by dsymutil
in favor of using DW_LLE_base_address + DW_LLE_offset_pair instead.

The DW_LLE_start_length is one AddressSize followed by a ULEB per entry,
whereas, the DW_LLE_base_address + DW_LLE_offset_pair will use one
AddressSize for the base address, and then the DW_LLE_offset_pair is a
pair of ULEBs. This will be more efficient where a loclist fragment has
many entries.

Differential Revision: https://reviews.llvm.org/D153080

llvm/lib/DWARFLinker/DWARFStreamer.cpp
llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test
llvm/test/tools/dsymutil/ARM/dwarf5-macho.test
llvm/test/tools/dsymutil/X86/dwarf5-loclists.test
llvm/test/tools/llvm-dwarfutil/ELF/X86/dwarf5-loclists.test

index 0e6a787..ee868be 100644 (file)
@@ -615,23 +615,35 @@ void DwarfStreamer::emitDwarfDebugLocListsTableFragment(
 
   // Make .debug_loclists the current section.
   MS->switchSection(MC->getObjectFileInfo()->getDwarfLoclistsSection());
-
-  unsigned AddressSize = Unit.getOrigUnit().getAddressByteSize();
+  std::optional<uint64_t> BaseAddress;
 
   for (const DWARFLocationExpression &LocExpression :
        LinkedLocationExpression) {
     if (LocExpression.Range) {
+
+      if (!BaseAddress) {
+
+        BaseAddress = LocExpression.Range->LowPC;
+
+        // Emit base address.
+        MS->emitInt8(dwarf::DW_LLE_base_address);
+        LocListsSectionSize += 1;
+        unsigned AddressSize = Unit.getOrigUnit().getAddressByteSize();
+        MS->emitIntValue(*BaseAddress, AddressSize);
+        LocListsSectionSize += AddressSize;
+      }
+
       // Emit type of entry.
-      MS->emitInt8(dwarf::DW_LLE_start_length);
+      MS->emitInt8(dwarf::DW_LLE_offset_pair);
       LocListsSectionSize += 1;
 
-      // Emit start address.
-      MS->emitIntValue(LocExpression.Range->LowPC, AddressSize);
-      LocListsSectionSize += AddressSize;
+      // Emit start offset relative to base address.
+      LocListsSectionSize +=
+          MS->emitULEB128IntValue(LocExpression.Range->LowPC - *BaseAddress);
 
-      // Emit length of the range.
-      LocListsSectionSize += MS->emitSLEB128IntValue(
-          LocExpression.Range->HighPC - LocExpression.Range->LowPC);
+      // Emit end offset relative to base address.
+      LocListsSectionSize +=
+          MS->emitULEB128IntValue(LocExpression.Range->HighPC - *BaseAddress);
     } else {
       // Emit type of entry.
       MS->emitInt8(dwarf::DW_LLE_default_location);
index f0e7445..0efaabc 100644 (file)
@@ -39,35 +39,41 @@ CHECK:.debug_abbrev contents:
 CHECK-NEXT: Abbrev table for offset: 0x00000000
 
 CHECK: .debug_info contents:
-CHECK: 0x00000000: Compile Unit: length = 0x00000064, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000068)
+CHECK: 0x00000000: Compile Unit: length = 0x00000064, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08
 CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x[[RANGELIST_OFFSET:[0-9a-f]+]]
 CHECK-NEXT:                  [0x[[RANGELIST_OFFSET_START:[0-9a-f]+]], 0x[[RANGELIST_OFFSET_END:[0-9a-f]+]]))
-CHECK: DW_TAG_formal_parameter [3]   (0x00000033)
-CHECK-NEXT:                   DW_AT_location [DW_FORM_sec_offset]   (0x[[LOCLIST_OFFSET:[0-9a-f]+]]:
-CHECK-NEXT:                      [0x[[LOCLIST_OFFSET_START:[0-9a-f]+]], 0x[[LOCLIST_OFFSET_END:[0-9a-f]+]]): [[LOCLIST_EXPR:.*]]
-CHECK-NEXT:                      [0x[[LOCLIST_OFFSET_START2:[0-9a-f]+]], 0x[[LOCLIST_OFFSET_END2:[0-9a-f]+]]): [[LOCLIST_EXPR2:.*]])
-
-CHECK: 0x00000068: Compile Unit: length = 0x00000072, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x000000de)
-CHECK:              DW_AT_ranges [DW_FORM_sec_offset] (0x00000000
-CHECK-NEXT:                 [0x00000000000200[[RANGE_OFFSET_START:[0-9a-f][0-9a-f]]], 0x00000000000200[[RANGE_OFFSET_END:[0-9a-f][0-9a-f]]]))
-CHECK: DW_TAG_formal_parameter [3] (0x0000009a)
-CHECK-NEXT:                  DW_AT_location [DW_FORM_sec_offset]   (0x[[LOC_OFFSET:[0-9a-f]+]]:
-CHECK-NEXT:                     [0x00000000000200[[LOC_OFFSET_START:[0-9a-f][0-9a-f]]], 0x00000000000200[[LOC_OFFSET_END:[0-9a-f][0-9a-f]]]): [[LOC_EXPR:.*]]
-CHECK-NEXT:                     [0x00000000000200[[LOC_OFFSET_START2:[0-9a-f][0-9a-f]]], 0x00000000000200[[LOC_OFFSET_END2:[0-9a-f][0-9a-f]]]): [[LOC_EXPR2:.*]])
+CHECK: 0x00000033:   DW_TAG_subprogram [2] * (0x0000000c)
+CHECK-NEXT:  DW_AT_low_pc [DW_FORM_addr]     (0x[[#%.16x,LOCLIST_LOWPC:]])
+CHECK: 0x00000050:     DW_TAG_formal_parameter [3]   (0x00000033)
+CHECK-NEXT:                   DW_AT_location [DW_FORM_sec_offset]   (0x[[LOCLIST_OFFSET:[0-9a-f]+]]: 
+CHECK-NEXT:                      [0x[[#%.16x,LOCLIST_PAIR_START:]], 0x[[#%.16x,LOCLIST_PAIR_END:]]): [[LOCLIST_EXPR:.*]]
+CHECK-NEXT:                      [0x[[#%.16x,LOCLIST_PAIR_START2:]], 0x[[#%.16x,LOCLIST_PAIR_END2:]]): [[LOCLIST_EXPR2:.*]])
+
+CHECK: 0x00000068: Compile Unit: length = 0x00000072, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x08
+CHECK:              DW_AT_low_pc [DW_FORM_addr]       (0x[[#%.16x,RANGE_LOWPC:]])
+CHECK-NEXT:              DW_AT_ranges [DW_FORM_sec_offset] (0x00000000
+CHECK-NEXT:                 [0x[[#%.16x,RANGE_START:]], 0x[[#%.16x,RANGE_END:]]))
+CHECK:0x0000009a:   DW_TAG_subprogram [2] * (0x00000073)
+CHECK-NEXT:                DW_AT_low_pc [DW_FORM_addr]     (0x[[#%.16x,LOC_LOWPC:]])
+CHECK:0x000000b7:     DW_TAG_formal_parameter [3]   (0x0000009a)
+CHECK-NEXT:                  DW_AT_location [DW_FORM_sec_offset]   (0x[[LOC_OFFSET:[0-9a-f]+]]: 
+CHECK-NEXT:                     [0x[[#%.16x,LOC_PAIR_START:]], 0x[[#%.16x,LOC_PAIR_END:]]): [[LOC_EXPR:.*]]
+CHECK-NEXT:                     [0x[[#%.16x,LOC_PAIR_START2:]], 0x[[#%.16x,LOC_PAIR_END2:]]): [[LOC_EXPR2:.*]])
 
 CHECK: .debug_loc contents:
 CHECK-NEXT: 0x[[LOC_OFFSET]]:
-CHECK-NEXT:            (0x0000000000000000, 0x0000000000000004): [[LOC_EXPR:.*]]
-CHECK-NEXT:            (0x0000000000000004, 0x0000000000000008): [[LOC_EXPR2:.*]]
+CHECK-NEXT:            (0x[[#sub(LOC_PAIR_START,LOC_LOWPC)]], 0x[[#sub(LOC_PAIR_END,LOC_LOWPC)]]): [[LOC_EXPR:.*]]
+CHECK-NEXT:            (0x[[#sub(LOC_PAIR_START2,LOC_LOWPC)]], 0x[[#sub(LOC_PAIR_END2,LOC_LOWPC)]]): [[LOC_EXPR2:.*]]
 
 CHECK: .debug_loclists contents:
-CHECK-NEXT: 0x00000000: locations list header: length = 0x00000024, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
-CHECK-NEXT: 0x[[LOCLIST_OFFSET]]:
-CHECK-NEXT:             DW_LLE_start_length    {{.*}}
-CHECK-NEXT:                       => [0x[[LOCLIST_OFFSET_START]], 0x[[LOCLIST_OFFSET_END]]): [[LOCLIST_EXPR]]
-CHECK-NEXT:             DW_LLE_start_length    {{.*}}
-CHECK-NEXT:                       => [0x[[LOCLIST_OFFSET_START2]], 0x[[LOCLIST_OFFSET_END2]]): [[LOCLIST_EXPR2]]
-CHECK-NEXT:             DW_LLE_end_of_list     ()
+CHECK-NEXT: 0x00000000: locations list header: length = 0x0000001f, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
+CHECK-NEXT: 0x[[LOCLIST_OFFSET]]: 
+CHECK-NEXT:            DW_LLE_base_address    (0x[[#LOCLIST_LOWPC]])
+CHECK-NEXT:            DW_LLE_offset_pair     (0x[[#sub(LOCLIST_PAIR_START,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END,LOCLIST_LOWPC)]])
+CHECK-NEXT:                      => [0x[[#LOCLIST_PAIR_START]], 0x[[#LOCLIST_PAIR_END]]): [[LOCLIST_EXPR]]
+CHECK-NEXT:            DW_LLE_offset_pair     (0x[[#sub(LOCLIST_PAIR_START2,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END2,LOCLIST_LOWPC)]])
+CHECK-NEXT:                      => [0x[[#LOCLIST_PAIR_START2]], 0x[[#LOCLIST_PAIR_END2]]): [[LOCLIST_EXPR2]]
+CHECK-NEXT:            DW_LLE_end_of_list     ()
 
 CHECK: .debug_line contents:
 CHECK-NEXT: debug_line[0x00000000]
@@ -138,7 +144,7 @@ CHECK-NEXT: 0x00000000: "/Users/shubham/Development/test109275485"
 CHECK-NEXT: 0x00000029: "a.cpp"
 
 CHECK: .debug_ranges contents:
-CHECK-NEXT: 00000000 00000000000000[[RANGE_OFFSET_START]] 00000000000000[[RANGE_OFFSET_END]]
+CHECK-NEXT: 00000000 [[#sub(RANGE_START,RANGE_LOWPC)]] [[#sub(RANGE_END,RANGE_LOWPC)]]
 
 CHECK: .debug_rnglists contents:
 CHECK-NEXT: 0x00000000: range list header: length = 0x00000013, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
index c73eaf1..e15410d 100644 (file)
@@ -25,22 +25,25 @@ CHECK:.debug_abbrev contents:
 CHECK-NEXT: Abbrev table for offset: 0x00000000
 
 CHECK: .debug_info contents:
-CHECK-NEXT: 0x00000000: Compile Unit: length = 0x00000064, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000068)
-CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x[[RANGE_OFFSET:[0-9a-f]+]]
-CHECK-NEXT:                  [0x[[RANGE_OFFSET_START:[0-9a-f]+]], 0x[[RANGE_OFFSET_END:[0-9a-f]+]]))
+CHECK-NEXT: 0x00000000: Compile Unit: length = 0x00000064, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08 
+CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x[[RANGELIST_OFFSET:[0-9a-f]+]]
+CHECK-NEXT:                  [0x[[RANGELIST_OFFSET_START:[0-9a-f]+]], 0x[[RANGELIST_OFFSET_END:[0-9a-f]+]]))
+CHECK: 0x00000033:   DW_TAG_subprogram [2] * (0x0000000c)
+CHECK-NEXT:  DW_AT_low_pc [DW_FORM_addr]     (0x[[#%.16x,LOCLIST_LOWPC:]])
 CHECK: 0x00000050:     DW_TAG_formal_parameter [3]   (0x00000033)
-CHECK-NEXT:                   DW_AT_location [DW_FORM_sec_offset]   (0x[[LOC_OFFSET:[0-9a-f]+]]:
-CHECK-NEXT:                      [0x[[LOC_OFFSET_START:[0-9a-f]+]], 0x[[LOC_OFFSET_END:[0-9a-f]+]]): [[LOC_EXPR:.*]]
-CHECK-NEXT:                      [0x[[LOC_OFFSET_START2:[0-9a-f]+]], 0x[[LOC_OFFSET_END2:[0-9a-f]+]]): [[LOC_EXPR2:.*]])
+CHECK-NEXT:                   DW_AT_location [DW_FORM_sec_offset]   (0x[[LOC_OFFSET:[0-9a-f]+]]: 
+CHECK-NEXT:                      [0x[[#%.16x,LOCLIST_PAIR_START:]], 0x[[#%.16x,LOCLIST_PAIR_END:]]): [[LOCLIST_EXPR:.*]]
+CHECK-NEXT:                      [0x[[#%.16x,LOCLIST_PAIR_START2:]], 0x[[#%.16x,LOCLIST_PAIR_END2:]]): [[LOCLIST_EXPR2:.*]])
 
 CHECK: .debug_loclists contents:
-CHECK-NEXT: 0x00000000: locations list header: length = 0x00000024, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
-CHECK-NEXT: 0x[[LOC_OFFSET]]:
-CHECK-NEXT:             DW_LLE_start_length    {{.*}}
-CHECK-NEXT:                       => [0x[[LOC_OFFSET_START]], 0x[[LOC_OFFSET_END]]): [[LOC_EXPR]]
-CHECK-NEXT:             DW_LLE_start_length    {{.*}}
-CHECK-NEXT:                       => [0x[[LOC_OFFSET_START2]], 0x[[LOC_OFFSET_END2]]): [[LOC_EXPR2]]
-CHECK-NEXT:             DW_LLE_end_of_list     ()
+CHECK-NEXT: locations list header: length = 0x0000001f, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
+CHECK-NEXT: 0x[[LOC_OFFSET]]: 
+CHECK-NEXT:            DW_LLE_base_address    (0x[[#LOCLIST_LOWPC]])
+CHECK-NEXT:            DW_LLE_offset_pair     (0x[[#sub(LOCLIST_PAIR_START,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END,LOCLIST_LOWPC)]])
+CHECK-NEXT:                      => [0x[[#LOCLIST_PAIR_START]], 0x[[#LOCLIST_PAIR_END]]): [[LOCLIST_EXPR]]
+CHECK-NEXT:            DW_LLE_offset_pair     (0x[[#sub(LOCLIST_PAIR_START2,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END2,LOCLIST_LOWPC)]])
+CHECK-NEXT:                      => [0x[[#LOCLIST_PAIR_START2]], 0x[[#LOCLIST_PAIR_END2]]): [[LOCLIST_EXPR2]]
+CHECK-NEXT:            DW_LLE_end_of_list     ()
 
 CHECK: .debug_line contents:
 CHECK-NEXT: debug_line[0x00000000]
@@ -84,7 +87,7 @@ CHECK-NEXT: 0x00000029: "a.cpp"
 CHECK: .debug_rnglists contents:
 CHECK-NEXT: 0x00000000: range list header: length = 0x00000013, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
 CHECK-NEXT: ranges:
-CHECK-NEXT: [[RANGE_OFFSET]]: [DW_RLE_start_length]: {{.*}}[0x[[RANGE_OFFSET_START]], 0x[[RANGE_OFFSET_END]])
+CHECK-NEXT: [[RANGELIST_OFFSET]]: [DW_RLE_start_length]: {{.*}}[0x[[RANGELIST_OFFSET_START]], 0x[[RANGELIST_OFFSET_END]])
 
 CHECK: .debug_names contents:
 CHECK-NEX:T Name Index @ 0x0 {
index d393cda..a6e49af 100644 (file)
 #DWARF-CHECK:     [0x0000000100000fa3, 0x0000000100000fbc): DW_OP_breg6 RBP-20)
 #DWARF-CHECK:   DW_AT_name {{.*}} "argv"
 #DWARF-CHECK: DW_TAG_formal_parameter
-#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]   (0x0000004a:
+#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]   (0x00000030:
 #DWARF-CHECK:     [0x0000000100000f70, 0x0000000100000f89): DW_OP_reg4 RSI
 #DWARF-CHECK:     [0x0000000100000f89, 0x0000000100000fbc): DW_OP_entry_value(DW_OP_reg4 RSI), DW_OP_stack_value)
 #DWARF-CHECK:   DW_AT_name {{.*}} "argc"
 #DWARF-CHECK: .debug_loclists contents:
-#DWARF-CHECK: 0x00000000: locations list header: length = 0x00000062, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
+#DWARF-CHECK: 0x00000000: locations list header: length = 0x00000043, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
 #DWARF-CHECK: 0x0000000c:
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000f70, 0x0000000000000017)
-#DWARF-CHECK:                => [0x0000000100000f70, 0x0000000100000f87): DW_OP_reg5 RDI
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000f87, 0x000000000000000c)
-#DWARF-CHECK:                => [0x0000000100000f87, 0x0000000100000f93): DW_OP_reg3 RBX
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000f93, 0x000000000000000a)
-#DWARF-CHECK:                => [0x0000000100000f93, 0x0000000100000f9d): DW_OP_reg4 RSI
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000fa0, 0x0000000000000003)
-#DWARF-CHECK:                => [0x0000000100000fa0, 0x0000000100000fa3): DW_OP_reg3 RBX
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000fa3, 0x0000000000000019)
-#DWARF-CHECK:                => [0x0000000100000fa3, 0x0000000100000fbc): DW_OP_breg6 RBP-20
-#DWARF-CHECK:     DW_LLE_end_of_list     ()
-#DWARF-CHECK: 0x0000004a:
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000f70, 0x0000000000000019)
-#DWARF-CHECK:                => [0x0000000100000f70, 0x0000000100000f89): DW_OP_reg4 RSI
-#DWARF-CHECK:     DW_LLE_start_length    (0x0000000100000f89, 0x0000000000000033)
-#DWARF-CHECK:                => [0x0000000100000f89, 0x0000000100000fbc): DW_OP_entry_value(DW_OP_reg4 RSI), DW_OP_stack_value
-#DWARF-CHECK:     DW_LLE_end_of_list     ()
+#DWARF-CHECK:            DW_LLE_base_address    (0x0000000100000f70)
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000000, 0x0000000000000017)
+#DWARF-CHECK:                      => [0x0000000100000f70, 0x0000000100000f87): DW_OP_reg5 RDI
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000017, 0x0000000000000023)
+#DWARF-CHECK:                      => [0x0000000100000f87, 0x0000000100000f93): DW_OP_reg3 RBX
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000023, 0x000000000000002d)
+#DWARF-CHECK:                      => [0x0000000100000f93, 0x0000000100000f9d): DW_OP_reg4 RSI
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000030, 0x0000000000000033)
+#DWARF-CHECK:                      => [0x0000000100000fa0, 0x0000000100000fa3): DW_OP_reg3 RBX
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000033, 0x000000000000004c)
+#DWARF-CHECK:                      => [0x0000000100000fa3, 0x0000000100000fbc): DW_OP_breg6 RBP-20
+#DWARF-CHECK:            DW_LLE_end_of_list     ()
+#DWARF-CHECK: 0x00000030:
+#DWARF-CHECK:            DW_LLE_base_address    (0x0000000100000f70)
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000000, 0x0000000000000019)
+#DWARF-CHECK:                      => [0x0000000100000f70, 0x0000000100000f89): DW_OP_reg4 RSI
+#DWARF-CHECK:            DW_LLE_offset_pair     (0x0000000000000019, 0x000000000000004c)
+#DWARF-CHECK:                      => [0x0000000100000f89, 0x0000000100000fbc): DW_OP_entry_value(DW_OP_reg4 RSI), DW_OP_stack_value
+#DWARF-CHECK:            DW_LLE_end_of_list     ()
+
+
+
+
 
 #UPD-DWARF-CHECK: DW_TAG_compile_unit
 #UPD-DWARF-CHECK: DW_AT_name {{.*}} "dwarf5-loclists.c"
index 89b01c5..ce1e390 100644 (file)
 #DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]      (0x0000000c:
 #DWARF-CHECK: [0x0000000000001130, 0x0000000000001140): DW_OP_reg5 RDI)
 #DWARF-CHECK: DW_AT_name {{.*}}"var2"
-#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]     (0x00000019:
+#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]     (0x0000001b:
 #DWARF-CHECK: <default>: DW_OP_reg5 RDI)
 #DWARF-CHECK: DW_TAG_variable
 #DWARF-CHECK: DW_AT_name {{.*}}"var3"
-#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]     (0x0000001d:
+#DWARF-CHECK: DW_AT_location [DW_FORM_sec_offset]     (0x0000001f:
 #DWARF-CHECK: [0x0000000000001140, 0x0000000000001150): DW_OP_reg5 RDI
 #DWARF-CHECK: [0x0000000000001160, 0x0000000000001170): DW_OP_reg6 RBP)