test/DebugInfo/X86/debug-loc-asan.ll - llvm - Git at Google

 ; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s

 ; Verify that we have correct debug info for local variables in code
 ; instrumented with AddressSanitizer.

 ; Generated from the source file test.cc:
 ; int bar(int y) {
 ;   return y + 2;
 ; }
 ; with "clang++ -S -emit-llvm -fsanitize=address -O0 -g test.cc"

 ; First, argument variable "y" resides in %rdi:
 ; CHECK: DEBUG_VALUE: bar:y <- RDI

 ; Then its address is stored in a location on a stack:
 ; CHECK: movq %rdi, [[OFFSET:[0-9]+]](%rsp)
 ; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
 ; CHECK-NEXT: DEBUG_VALUE: bar:y <- [RSP+[[OFFSET]]]
 ; This location should be valid until the end of the function.

 ; CHECK: .Ldebug_loc{{[0-9]+}}:
 ; We expect two location ranges for the variable.

 ; First, it is stored in %rdx:
 ; CHECK:      .Lset{{[0-9]+}} = .Lfunc_begin0-.Lfunc_begin0
 ; CHECK-NEXT: .quad .Lset{{[0-9]+}}
 ; CHECK-NEXT: .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
 ; CHECK-NEXT: .quad .Lset{{[0-9]+}}
 ; CHECK: DW_OP_reg5

 ; Then it's addressed via %rsp:
 ; CHECK:      .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
 ; CHECK-NEXT: .quad .Lset{{[0-9]+}}
 ; CHECK-NEXT: .Lset{{[0-9]+}} = .Lfunc_end0-.Lfunc_begin0
 ; CHECK-NEXT: .quad .Lset{{[0-9]+}}
 ; CHECK: DW_OP_breg7
 ; CHECK-NEXT: [[OFFSET]]
 ; CHECK: DW_OP_deref

 ; ModuleID = 'test.cc'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"

 @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
 @__asan_option_detect_stack_use_after_return = external global i32
 @__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1

 ; Function Attrs: nounwind sanitize_address uwtable
 define i32 @_Z3bari(i32 %y) #0 {
 entry:
   %MyAlloca = alloca [64 x i8], align 32
   %0 = ptrtoint [64 x i8]* %MyAlloca to i64
   %1 = load i32* @__asan_option_detect_stack_use_after_return
   %2 = icmp ne i32 %1, 0
   br i1 %2, label %3, label %5

 ; <label>:3                                       ; preds = %entry
   %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
   br label %5

 ; <label>:5                                       ; preds = %entry, %3
   %6 = phi i64 [ %0, %entry ], [ %4, %3 ]
   %7 = add i64 %6, 32
   %8 = inttoptr i64 %7 to i32*
   %9 = inttoptr i64 %6 to i64*
   store i64 1102416563, i64* %9
   %10 = add i64 %6, 8
   %11 = inttoptr i64 %10 to i64*
   store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11
   %12 = add i64 %6, 16
   %13 = inttoptr i64 %12 to i64*
   store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
   %14 = lshr i64 %6, 3
   %15 = add i64 %14, 2147450880
   %16 = add i64 %15, 0
   %17 = inttoptr i64 %16 to i64*
   store i64 -868083100587789839, i64* %17
   %18 = ptrtoint i32* %8 to i64
   %19 = lshr i64 %18, 3
   %20 = add i64 %19, 2147450880
   %21 = inttoptr i64 %20 to i8*
   %22 = load i8* %21
   %23 = icmp ne i8 %22, 0
   call void @llvm.dbg.declare(metadata !{i32* %8}, metadata !12)
   br i1 %23, label %24, label %30

 ; <label>:24                                      ; preds = %5
   %25 = and i64 %18, 7
   %26 = add i64 %25, 3
   %27 = trunc i64 %26 to i8
   %28 = icmp sge i8 %27, %22
   br i1 %28, label %29, label %30

 ; <label>:29                                      ; preds = %24
   call void @__asan_report_store4(i64 %18)
   call void asm sideeffect "", ""()
   unreachable

 ; <label>:30                                      ; preds = %24, %5
   store i32 %y, i32* %8, align 4
   %31 = ptrtoint i32* %8 to i64, !dbg !13
   %32 = lshr i64 %31, 3, !dbg !13
   %33 = add i64 %32, 2147450880, !dbg !13
   %34 = inttoptr i64 %33 to i8*, !dbg !13
   %35 = load i8* %34, !dbg !13
   %36 = icmp ne i8 %35, 0, !dbg !13
   br i1 %36, label %37, label %43, !dbg !13

 ; <label>:37                                      ; preds = %30
   %38 = and i64 %31, 7, !dbg !13
   %39 = add i64 %38, 3, !dbg !13
   %40 = trunc i64 %39 to i8, !dbg !13
   %41 = icmp sge i8 %40, %35, !dbg !13
   br i1 %41, label %42, label %43

 ; <label>:42                                      ; preds = %37
   call void @__asan_report_load4(i64 %31), !dbg !13
   call void asm sideeffect "", ""()
   unreachable

 ; <label>:43                                      ; preds = %37, %30
   %44 = load i32* %8, align 4, !dbg !13
   %add = add nsw i32 %44, 2, !dbg !13
   store i64 1172321806, i64* %9, !dbg !13
   %45 = icmp ne i64 %6, %0, !dbg !13
   br i1 %45, label %46, label %53, !dbg !13

 ; <label>:46                                      ; preds = %43
   %47 = add i64 %15, 0, !dbg !13
   %48 = inttoptr i64 %47 to i64*, !dbg !13
   store i64 -723401728380766731, i64* %48, !dbg !13
   %49 = add i64 %6, 56, !dbg !13
   %50 = inttoptr i64 %49 to i64*, !dbg !13
   %51 = load i64* %50, !dbg !13
   %52 = inttoptr i64 %51 to i8*, !dbg !13
   store i8 0, i8* %52, !dbg !13
   br label %56, !dbg !13

 ; <label>:53                                      ; preds = %43
   %54 = add i64 %15, 0, !dbg !13
   %55 = inttoptr i64 %54 to i64*, !dbg !13
   store i64 0, i64* %55, !dbg !13
   br label %56, !dbg !13

 ; <label>:56                                      ; preds = %53, %46
   ret i32 %add, !dbg !13
 }

 ; Function Attrs: nounwind readnone
 declare void @llvm.dbg.declare(metadata, metadata) #1

 define internal void @asan.module_ctor() {
   call void @__asan_init_v3()
   ret void
 }

 declare void @__asan_init_v3()

 declare void @__asan_report_load4(i64)

 declare void @__asan_report_store4(i64)

 declare i64 @__asan_stack_malloc_0(i64, i64)

 attributes #0 = { nounwind sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
 attributes #1 = { nounwind readnone }

 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!9, !10}
 !llvm.ident = !{!11}

 !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (209308)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/test.cc] [DW_LANG_C_plus_plus]
 !1 = metadata !{metadata !"test.cc", metadata !"/llvm_cmake_gcc"}
 !2 = metadata !{}
 !3 = metadata !{metadata !4}
 !4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"_Z3bari", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3bari, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [bar]
 !5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/test.cc]
 !6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !7 = metadata !{metadata !8, metadata !8}
 !8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
 !10 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
 !11 = metadata !{metadata !"clang version 3.5.0 (209308)"}
 !12 = metadata !{i32 786689, metadata !4, metadata !"y", metadata !5, i32 16777217, metadata !8, i32 0, i32 0, metadata !14} ; [ DW_TAG_arg_variable ] [y] [line 1]
 !13 = metadata !{i32 2, i32 0, metadata !4, null}
 !14 = metadata !{i64 2}
	; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s \| FileCheck %s

	; Verify that we have correct debug info for local variables in code
	; instrumented with AddressSanitizer.

	; Generated from the source file test.cc:
	; int bar(int y) {
	; return y + 2;
	; }
	; with "clang++ -S -emit-llvm -fsanitize=address -O0 -g test.cc"

	; First, argument variable "y" resides in %rdi:
	; CHECK: DEBUG_VALUE: bar:y <- RDI

	; Then its address is stored in a location on a stack:
	; CHECK: movq %rdi, [[OFFSET:[0-9]+]](%rsp)
	; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
	; CHECK-NEXT: DEBUG_VALUE: bar:y <- [RSP+[[OFFSET]]]
	; This location should be valid until the end of the function.

	; CHECK: .Ldebug_loc{{[0-9]+}}:
	; We expect two location ranges for the variable.

	; First, it is stored in %rdx:
	; CHECK: .Lset{{[0-9]+}} = .Lfunc_begin0-.Lfunc_begin0
	; CHECK-NEXT: .quad .Lset{{[0-9]+}}
	; CHECK-NEXT: .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
	; CHECK-NEXT: .quad .Lset{{[0-9]+}}
	; CHECK: DW_OP_reg5

	; Then it's addressed via %rsp:
	; CHECK: .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
	; CHECK-NEXT: .quad .Lset{{[0-9]+}}
	; CHECK-NEXT: .Lset{{[0-9]+}} = .Lfunc_end0-.Lfunc_begin0
	; CHECK-NEXT: .quad .Lset{{[0-9]+}}
	; CHECK: DW_OP_breg7
	; CHECK-NEXT: [[OFFSET]]
	; CHECK: DW_OP_deref

	; ModuleID = 'test.cc'
	target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
	target triple = "x86_64-unknown-linux-gnu"

	@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
	@__asan_option_detect_stack_use_after_return = external global i32
	@__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1

	; Function Attrs: nounwind sanitize_address uwtable
	define i32 @_Z3bari(i32 %y) #0 {
	entry:
	%MyAlloca = alloca [64 x i8], align 32
	%0 = ptrtoint [64 x i8]* %MyAlloca to i64
	%1 = load i32* @__asan_option_detect_stack_use_after_return
	%2 = icmp ne i32 %1, 0
	br i1 %2, label %3, label %5

	; <label>:3 ; preds = %entry
	%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
	br label %5

	; <label>:5 ; preds = %entry, %3
	%6 = phi i64 [ %0, %entry ], [ %4, %3 ]
	%7 = add i64 %6, 32
	%8 = inttoptr i64 %7 to i32*
	%9 = inttoptr i64 %6 to i64*
	store i64 1102416563, i64* %9
	%10 = add i64 %6, 8
	%11 = inttoptr i64 %10 to i64*
	store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11
	%12 = add i64 %6, 16
	%13 = inttoptr i64 %12 to i64*
	store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
	%14 = lshr i64 %6, 3
	%15 = add i64 %14, 2147450880
	%16 = add i64 %15, 0
	%17 = inttoptr i64 %16 to i64*
	store i64 -868083100587789839, i64* %17
	%18 = ptrtoint i32* %8 to i64
	%19 = lshr i64 %18, 3
	%20 = add i64 %19, 2147450880
	%21 = inttoptr i64 %20 to i8*
	%22 = load i8* %21
	%23 = icmp ne i8 %22, 0
	call void @llvm.dbg.declare(metadata !{i32* %8}, metadata !12)
	br i1 %23, label %24, label %30

	; <label>:24 ; preds = %5
	%25 = and i64 %18, 7
	%26 = add i64 %25, 3
	%27 = trunc i64 %26 to i8
	%28 = icmp sge i8 %27, %22
	br i1 %28, label %29, label %30

	; <label>:29 ; preds = %24
	call void @__asan_report_store4(i64 %18)
	call void asm sideeffect "", ""()
	unreachable

	; <label>:30 ; preds = %24, %5
	store i32 %y, i32* %8, align 4
	%31 = ptrtoint i32* %8 to i64, !dbg !13
	%32 = lshr i64 %31, 3, !dbg !13
	%33 = add i64 %32, 2147450880, !dbg !13
	%34 = inttoptr i64 %33 to i8*, !dbg !13
	%35 = load i8* %34, !dbg !13
	%36 = icmp ne i8 %35, 0, !dbg !13
	br i1 %36, label %37, label %43, !dbg !13

	; <label>:37 ; preds = %30
	%38 = and i64 %31, 7, !dbg !13
	%39 = add i64 %38, 3, !dbg !13
	%40 = trunc i64 %39 to i8, !dbg !13
	%41 = icmp sge i8 %40, %35, !dbg !13
	br i1 %41, label %42, label %43

	; <label>:42 ; preds = %37
	call void @__asan_report_load4(i64 %31), !dbg !13
	call void asm sideeffect "", ""()
	unreachable

	; <label>:43 ; preds = %37, %30
	%44 = load i32* %8, align 4, !dbg !13
	%add = add nsw i32 %44, 2, !dbg !13
	store i64 1172321806, i64* %9, !dbg !13
	%45 = icmp ne i64 %6, %0, !dbg !13
	br i1 %45, label %46, label %53, !dbg !13

	; <label>:46 ; preds = %43
	%47 = add i64 %15, 0, !dbg !13
	%48 = inttoptr i64 %47 to i64*, !dbg !13
	store i64 -723401728380766731, i64* %48, !dbg !13
	%49 = add i64 %6, 56, !dbg !13
	%50 = inttoptr i64 %49 to i64*, !dbg !13
	%51 = load i64* %50, !dbg !13
	%52 = inttoptr i64 %51 to i8*, !dbg !13
	store i8 0, i8* %52, !dbg !13
	br label %56, !dbg !13

	; <label>:53 ; preds = %43
	%54 = add i64 %15, 0, !dbg !13
	%55 = inttoptr i64 %54 to i64*, !dbg !13
	store i64 0, i64* %55, !dbg !13
	br label %56, !dbg !13

	; <label>:56 ; preds = %53, %46
	ret i32 %add, !dbg !13
	}

	; Function Attrs: nounwind readnone
	declare void @llvm.dbg.declare(metadata, metadata) #1

	define internal void @asan.module_ctor() {
	call void @__asan_init_v3()
	ret void
	}

	declare void @__asan_init_v3()

	declare void @__asan_report_load4(i64)

	declare void @__asan_report_store4(i64)

	declare i64 @__asan_stack_malloc_0(i64, i64)

	attributes #0 = { nounwind sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
	attributes #1 = { nounwind readnone }

	!llvm.dbg.cu = !{!0}
	!llvm.module.flags = !{!9, !10}
	!llvm.ident = !{!11}

	!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (209308)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/test.cc] [DW_LANG_C_plus_plus]
	!1 = metadata !{metadata !"test.cc", metadata !"/llvm_cmake_gcc"}
	!2 = metadata !{}
	!3 = metadata !{metadata !4}
	!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"_Z3bari", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3bari, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [bar]
	!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/test.cc]
	!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
	!7 = metadata !{metadata !8, metadata !8}
	!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
	!9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
	!10 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
	!11 = metadata !{metadata !"clang version 3.5.0 (209308)"}
	!12 = metadata !{i32 786689, metadata !4, metadata !"y", metadata !5, i32 16777217, metadata !8, i32 0, i32 0, metadata !14} ; [ DW_TAG_arg_variable ] [y] [line 1]
	!13 = metadata !{i32 2, i32 0, metadata !4, null}
	!14 = metadata !{i64 2}