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; RUN: llc -O1 -filetype=obj -mtriple=x86_64-apple-darwin < %s > %t
; RUN: llvm-dwarfdump %t | FileCheck %s
; RUN: llvm-objdump -r %t | FileCheck -check-prefix=DARWIN %s
; RUN: llc -O1 -filetype=obj -mtriple=x86_64-pc-linux-gnu < %s > %t
; RUN: llvm-dwarfdump %t | FileCheck %s
; RUN: llvm-objdump -r %t | FileCheck -check-prefix=LINUX %s
; PR9493
; Adapted from the original test case in r127757.
; We use 'llc -O1' to induce variable 'x' to live in different locations.
; We don't actually care where 'x' lives, or what exact optimizations get
; used, as long as 'x' moves around we're fine.
; // The variable 'x' lives in different locations, so it needs an entry in
; // the .debug_loc table section, referenced by DW_AT_location.
; // This ref is not relocatable on Darwin, and is relocatable elsewhere.
; extern int g(int, int);
; extern int a;
;
; void f(void) {
; int x;
; a = g(0, 0);
; x = 1;
; while (x & 1) { x *= a; }
; a = g(x, 0);
; x = 2;
; while (x & 2) { x *= a; }
; a = g(0, x);
; }
; // The 'x' variable and its symbol reference location
; CHECK: .debug_info contents:
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
; CHECK-NEXT: DW_AT_name {{.*}} "x"
; CHECK-NEXT: DW_AT_decl_file
; CHECK-NEXT: DW_AT_decl_line
; CHECK-NEXT: DW_AT_type
; Check that the location contains only 4 ranges - this verifies that the 4th
; and 5th ranges were successfully merged into a single range.
; CHECK: .debug_loc contents:
; CHECK: 0x00000000:
; CHECK: Beginning address offset:
; CHECK: Beginning address offset:
; CHECK: Beginning address offset:
; CHECK: Beginning address offset:
; CHECK-NOT: Beginning address offset:
; Check that we have no relocations in Darwin's output.
; DARWIN-NOT: X86_64_RELOC{{.*}} __debug_loc
; Check we have a relocation for the debug_loc entry in Linux output.
; LINUX: RELOCATION RECORDS FOR [.rela.debug_info]
; LINUX-NOT: RELOCATION RECORDS
; LINUX: R_X86_64{{.*}} .debug_loc+0
; ModuleID = 'simple.c'
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32"
@a = external global i32
define void @f() nounwind {
entry:
%call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8
store i32 %call, i32* @a, align 4, !dbg !8
tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !5, metadata !MDExpression()), !dbg !13
br label %while.body
while.body: ; preds = %entry, %while.body
%x.017 = phi i32 [ 1, %entry ], [ %mul, %while.body ]
%mul = mul nsw i32 %call, %x.017, !dbg !14
%and = and i32 %mul, 1, !dbg !14
%tobool = icmp eq i32 %and, 0, !dbg !14
br i1 %tobool, label %while.end, label %while.body, !dbg !14
while.end: ; preds = %while.body
tail call void @llvm.dbg.value(metadata i32 %mul, i64 0, metadata !5, metadata !MDExpression()), !dbg !14
%call4 = tail call i32 @g(i32 %mul, i32 0) nounwind, !dbg !15
store i32 %call4, i32* @a, align 4, !dbg !15
tail call void @llvm.dbg.value(metadata i32 2, i64 0, metadata !5, metadata !MDExpression()), !dbg !17
br label %while.body9
while.body9: ; preds = %while.end, %while.body9
%x.116 = phi i32 [ 2, %while.end ], [ %mul12, %while.body9 ]
%mul12 = mul nsw i32 %call4, %x.116, !dbg !18
%and7 = and i32 %mul12, 2, !dbg !18
%tobool8 = icmp eq i32 %and7, 0, !dbg !18
br i1 %tobool8, label %while.end13, label %while.body9, !dbg !18
while.end13: ; preds = %while.body9
tail call void @llvm.dbg.value(metadata i32 %mul12, i64 0, metadata !5, metadata !MDExpression()), !dbg !18
%call15 = tail call i32 @g(i32 0, i32 %mul12) nounwind, !dbg !19
store i32 %call15, i32* @a, align 4, !dbg !19
ret void, !dbg !20
}
declare i32 @g(i32, i32)
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!24}
!0 = !MDSubprogram(name: "f", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !23, scope: !1, type: !3, function: void ()* @f, variables: !22)
!1 = !MDFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation")
!2 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk)", isOptimized: true, emissionKind: 1, file: !23, enums: !4, retainedTypes: !4, subprograms: !21, imports: null)
!3 = !MDSubroutineType(types: !4)
!4 = !{null}
!5 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "x", line: 5, scope: !6, file: !1, type: !7)
!6 = distinct !MDLexicalBlock(line: 4, column: 14, file: !23, scope: !0)
!7 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !MDLocation(line: 6, column: 3, scope: !6)
!12 = !{i32 1}
!13 = !MDLocation(line: 7, column: 3, scope: !6)
!14 = !MDLocation(line: 8, column: 3, scope: !6)
!15 = !MDLocation(line: 9, column: 3, scope: !6)
!16 = !{i32 2}
!17 = !MDLocation(line: 10, column: 3, scope: !6)
!18 = !MDLocation(line: 11, column: 3, scope: !6)
!19 = !MDLocation(line: 12, column: 3, scope: !6)
!20 = !MDLocation(line: 13, column: 1, scope: !6)
!21 = !{!0}
!22 = !{!5}
!23 = !MDFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation")
!24 = !{i32 1, !"Debug Info Version", i32 3}
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