Make sure that rangelists are also relative to the compile unit

low_pc similar to location lists.

Fixes PR19563

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207283 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 8f4d89a12b1a5d79480c1e545091729b5dc70d4e..32f7f42c5d13f5c5ccf94648411a39e598fdb242 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2355,8 +2355,15 @@ void DwarfDebug::emitDebugRanges() {
         const MCSymbol *End = Range.getEnd();
         assert(Begin && "Range without a begin symbol?");
         assert(End && "Range without an end symbol?");
-        Asm->OutStreamer.EmitSymbolValue(Begin, Size);
-        Asm->OutStreamer.EmitSymbolValue(End, Size);
+        if (TheCU->getRanges().size() == 1) {
+          // Grab the begin symbol from the first range as our base.
+          const MCSymbol *Base = TheCU->getRanges()[0].getStart();
+          Asm->EmitLabelDifference(Begin, Base, Size);
+          Asm->EmitLabelDifference(End, Base, Size);
+        } else {
+          Asm->OutStreamer.EmitSymbolValue(Begin, Size);
+          Asm->OutStreamer.EmitSymbolValue(End, Size);
+        }
       }
 
       // And terminate the list with two 0 values.

diff --git a/test/DebugInfo/X86/debug-ranges-offset.ll b/test/DebugInfo/X86/debug-ranges-offset.ll
new file mode 100644 (file)
index 0000000..365ba17
--- /dev/null
+++ b/test/DebugInfo/X86/debug-ranges-offset.ll
@@ -0,0 +1,241 @@
+; RUN: llc -filetype=obj -mtriple=x86_64-pc-linux-gnu %s -o %t
+; RUN: llvm-readobj --relocations %t | FileCheck %s
+
+; Check that we don't have any relocations in the ranges section - 
+; to show that we're producing this as a relative offset to the
+; low_pc for the compile unit.
+; CHECK-NOT: .rela.debug_ranges
+
+@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 0, void ()* @__msan_init }]
+@str = private unnamed_addr constant [4 x i8] c"zzz\00"
+@__msan_retval_tls = external thread_local(initialexec) global [8 x i64]
+@__msan_retval_origin_tls = external thread_local(initialexec) global i32
+@__msan_param_tls = external thread_local(initialexec) global [1000 x i64]
+@__msan_param_origin_tls = external thread_local(initialexec) global [1000 x i32]
+@__msan_va_arg_tls = external thread_local(initialexec) global [1000 x i64]
+@__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
+@__msan_origin_tls = external thread_local(initialexec) global i32
+@__executable_start = external hidden global i32
+@_end = external hidden global i32
+
+; Function Attrs: sanitize_memory uwtable
+define void @_Z1fv() #0 {
+entry:
+  %p = alloca i32*, align 8
+  %0 = ptrtoint i32** %p to i64, !dbg !19
+  %1 = and i64 %0, -70368744177672, !dbg !19
+  %2 = inttoptr i64 %1 to i64*, !dbg !19
+  store i64 -1, i64* %2, align 8, !dbg !19
+  store i64 0, i64* getelementptr inbounds ([1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !19
+  store i64 0, i64* getelementptr inbounds ([8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
+  %call = call i8* @_Znwm(i64 4) #4, !dbg !19
+  %_msret = load i64* getelementptr inbounds ([8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
+  %3 = bitcast i8* %call to i32*, !dbg !19
+  tail call void @llvm.dbg.value(metadata !{i32* %3}, i64 0, metadata !9), !dbg !19
+  %4 = inttoptr i64 %1 to i64*, !dbg !19
+  store i64 %_msret, i64* %4, align 8, !dbg !19
+  store volatile i32* %3, i32** %p, align 8, !dbg !19
+  tail call void @llvm.dbg.value(metadata !{i32** %p}, i64 0, metadata !9), !dbg !19
+  %p.0.p.0. = load volatile i32** %p, align 8, !dbg !20
+  %_msld = load i64* %4, align 8, !dbg !20
+  %_mscmp = icmp eq i64 %_msld, 0, !dbg !20
+  br i1 %_mscmp, label %6, label %5, !dbg !20, !prof !22
+
+; <label>:5                                       ; preds = %entry
+  call void @__msan_warning_noreturn(), !dbg !20
+  call void asm sideeffect "", ""() #3, !dbg !20
+  unreachable, !dbg !20
+
+; <label>:6                                       ; preds = %entry
+  %7 = load i32* %p.0.p.0., align 4, !dbg !20, !tbaa !23
+  %8 = ptrtoint i32* %p.0.p.0. to i64, !dbg !20
+  %9 = and i64 %8, -70368744177665, !dbg !20
+  %10 = inttoptr i64 %9 to i32*, !dbg !20
+  %_msld2 = load i32* %10, align 4, !dbg !20
+  %11 = icmp ne i32 %_msld2, 0, !dbg !20
+  %12 = xor i32 %_msld2, -1, !dbg !20
+  %13 = and i32 %7, %12, !dbg !20
+  %14 = icmp eq i32 %13, 0, !dbg !20
+  %_msprop_icmp = and i1 %11, %14, !dbg !20
+  br i1 %_msprop_icmp, label %15, label %16, !dbg !20, !prof !27
+
+; <label>:15                                      ; preds = %6
+  call void @__msan_warning_noreturn(), !dbg !20
+  call void asm sideeffect "", ""() #3, !dbg !20
+  unreachable, !dbg !20
+
+; <label>:16                                      ; preds = %6
+  %tobool = icmp eq i32 %7, 0, !dbg !20
+  br i1 %tobool, label %if.end, label %if.then, !dbg !20
+
+if.then:                                          ; preds = %16
+  store i64 0, i64* getelementptr inbounds ([1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !28
+  store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !28
+  %puts = call i32 @puts(i8* getelementptr inbounds ([4 x i8]* @str, i64 0, i64 0)), !dbg !28
+  br label %if.end, !dbg !28
+
+if.end:                                           ; preds = %16, %if.then
+  ret void, !dbg !29
+}
+
+; Function Attrs: nobuiltin
+declare i8* @_Znwm(i64) #1
+
+; Function Attrs: sanitize_memory uwtable
+define i32 @main() #0 {
+entry:
+  %p.i = alloca i32*, align 8
+  %0 = ptrtoint i32** %p.i to i64, !dbg !30
+  %1 = and i64 %0, -70368744177672, !dbg !30
+  %2 = inttoptr i64 %1 to i64*, !dbg !30
+  store i64 -1, i64* %2, align 8, !dbg !30
+  %p.i.0..sroa_cast = bitcast i32** %p.i to i8*, !dbg !30
+  call void @llvm.lifetime.start(i64 8, i8* %p.i.0..sroa_cast), !dbg !30
+  store i64 0, i64* getelementptr inbounds ([1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !30
+  store i64 0, i64* getelementptr inbounds ([8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
+  %call.i = call i8* @_Znwm(i64 4) #4, !dbg !30
+  %_msret = load i64* getelementptr inbounds ([8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
+  %3 = bitcast i8* %call.i to i32*, !dbg !30
+  tail call void @llvm.dbg.value(metadata !{i32* %3}, i64 0, metadata !32), !dbg !30
+  %4 = inttoptr i64 %1 to i64*, !dbg !30
+  store i64 %_msret, i64* %4, align 8, !dbg !30
+  store volatile i32* %3, i32** %p.i, align 8, !dbg !30
+  tail call void @llvm.dbg.value(metadata !{i32** %p.i}, i64 0, metadata !32), !dbg !30
+  %p.i.0.p.0.p.0..i = load volatile i32** %p.i, align 8, !dbg !33
+  %_msld = load i64* %4, align 8, !dbg !33
+  %_mscmp = icmp eq i64 %_msld, 0, !dbg !33
+  br i1 %_mscmp, label %6, label %5, !dbg !33, !prof !22
+
+; <label>:5                                       ; preds = %entry
+  call void @__msan_warning_noreturn(), !dbg !33
+  call void asm sideeffect "", ""() #3, !dbg !33
+  unreachable, !dbg !33
+
+; <label>:6                                       ; preds = %entry
+  %7 = load i32* %p.i.0.p.0.p.0..i, align 4, !dbg !33, !tbaa !23
+  %8 = ptrtoint i32* %p.i.0.p.0.p.0..i to i64, !dbg !33
+  %9 = and i64 %8, -70368744177665, !dbg !33
+  %10 = inttoptr i64 %9 to i32*, !dbg !33
+  %_msld2 = load i32* %10, align 4, !dbg !33
+  %11 = icmp ne i32 %_msld2, 0, !dbg !33
+  %12 = xor i32 %_msld2, -1, !dbg !33
+  %13 = and i32 %7, %12, !dbg !33
+  %14 = icmp eq i32 %13, 0, !dbg !33
+  %_msprop_icmp = and i1 %11, %14, !dbg !33
+  br i1 %_msprop_icmp, label %15, label %16, !dbg !33, !prof !27
+
+; <label>:15                                      ; preds = %6
+  call void @__msan_warning_noreturn(), !dbg !33
+  call void asm sideeffect "", ""() #3, !dbg !33
+  unreachable, !dbg !33
+
+; <label>:16                                      ; preds = %6
+  %tobool.i = icmp eq i32 %7, 0, !dbg !33
+  br i1 %tobool.i, label %_Z1fv.exit, label %if.then.i, !dbg !33
+
+if.then.i:                                        ; preds = %16
+  store i64 0, i64* getelementptr inbounds ([1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !34
+  store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !34
+  %puts.i = call i32 @puts(i8* getelementptr inbounds ([4 x i8]* @str, i64 0, i64 0)), !dbg !34
+  br label %_Z1fv.exit, !dbg !34
+
+_Z1fv.exit:                                       ; preds = %16, %if.then.i
+  call void @llvm.lifetime.end(i64 8, i8* %p.i.0..sroa_cast), !dbg !35
+  store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !36
+  ret i32 0, !dbg !36
+}
+
+declare void @__msan_init()
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata) #2
+
+; Function Attrs: nounwind
+declare i32 @puts(i8* nocapture readonly) #3
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.start(i64, i8* nocapture) #3
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture) #3
+
+declare void @__msan_warning_noreturn()
+
+declare void @__msan_maybe_warning_1(i8, i32)
+
+declare void @__msan_maybe_store_origin_1(i8, i8*, i32)
+
+declare void @__msan_maybe_warning_2(i16, i32)
+
+declare void @__msan_maybe_store_origin_2(i16, i8*, i32)
+
+declare void @__msan_maybe_warning_4(i32, i32)
+
+declare void @__msan_maybe_store_origin_4(i32, i8*, i32)
+
+declare void @__msan_maybe_warning_8(i64, i32)
+
+declare void @__msan_maybe_store_origin_8(i64, i8*, i32)
+
+declare void @__msan_set_alloca_origin4(i8*, i64, i8*, i64)
+
+declare void @__msan_poison_stack(i8*, i64)
+
+declare i32 @__msan_chain_origin(i32)
+
+declare i8* @__msan_memmove(i8*, i8*, i64)
+
+declare i8* @__msan_memcpy(i8*, i8*, i64)
+
+declare i8* @__msan_memset(i8*, i32, i64)
+
+; Function Attrs: nounwind
+declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #3
+
+attributes #0 = { sanitize_memory uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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 = { nobuiltin "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind readnone }
+attributes #3 = { nounwind }
+attributes #4 = { builtin }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!16, !17}
+!llvm.ident = !{!18}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/foo.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"foo.cpp", metadata !"/usr/local/google/home/echristo/tmp"}
+!2 = metadata !{}
+!3 = metadata !{metadata !4, metadata !13}
+!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"f", metadata !"f", metadata !"_Z1fv", i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_Z1fv, null, null, metadata !8, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [f]
+!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/tmp/foo.cpp]
+!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 !{null}
+!8 = metadata !{metadata !9}
+!9 = metadata !{i32 786688, metadata !4, metadata !"p", metadata !5, i32 4, metadata !10, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [p] [line 4]
+!10 = metadata !{i32 786485, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !11} ; [ DW_TAG_volatile_type ] [line 0, size 0, align 0, offset 0] [from ]
+!11 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
+!12 = 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]
+!13 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"main", metadata !"main", metadata !"", i32 9, metadata !14, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @main, null, null, metadata !2, i32 9} ; [ DW_TAG_subprogram ] [line 9] [def] [main]
+!14 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{metadata !12}
+!16 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!17 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!18 = metadata !{metadata !"clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)"}
+!19 = metadata !{i32 4, i32 0, metadata !4, null}
+!20 = metadata !{i32 5, i32 0, metadata !21, null}
+!21 = metadata !{i32 786443, metadata !1, metadata !4, i32 5, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/foo.cpp]
+!22 = metadata !{metadata !"branch_weights", i32 1000, i32 1}
+!23 = metadata !{metadata !24, metadata !24, i64 0}
+!24 = metadata !{metadata !"int", metadata !25, i64 0}
+!25 = metadata !{metadata !"omnipotent char", metadata !26, i64 0}
+!26 = metadata !{metadata !"Simple C/C++ TBAA"}
+!27 = metadata !{metadata !"branch_weights", i32 1, i32 1000}
+!28 = metadata !{i32 6, i32 0, metadata !21, null}
+!29 = metadata !{i32 7, i32 0, metadata !4, null}
+!30 = metadata !{i32 4, i32 0, metadata !4, metadata !31}
+!31 = metadata !{i32 10, i32 0, metadata !13, null}
+!32 = metadata !{i32 786688, metadata !4, metadata !"p", metadata !5, i32 4, metadata !10, i32 0, metadata !31} ; [ DW_TAG_auto_variable ] [p] [line 4]
+!33 = metadata !{i32 5, i32 0, metadata !21, metadata !31}
+!34 = metadata !{i32 6, i32 0, metadata !21, metadata !31}
+!35 = metadata !{i32 7, i32 0, metadata !4, metadata !31}
+!36 = metadata !{i32 11, i32 0, metadata !13, null}