eliminate the magic AbsoluteDebugSectionOffsets MAI hook,

which is really a property of the section being referenced.
Add a predicate to MCSection to replace it.

Yay for reduction in magic.

llvm-svn: 100367

8 files changed, 4 insertions, 9 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
index 7de61099671..84d47ec4496 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
@@ -20,6 +20,7 @@
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/Target/TargetData.h"
@@ -61,15 +62,16 @@ void DwarfPrinter::EmitSectionOffset(const MCSymbol *Label,
   // If Label has already been emitted, verify that it is in the same section as
   // section label for sanity.
   assert((!Label->isInSection() || &Label->getSection() == &Section) &&
-         "Section offset using wrong section base for label"); (void)Section;
+         "Section offset using wrong section base for label");
   
   // If the section in question will end up with an address of 0 anyway, we can
   // just emit an absolute reference to save a relocation.
-  if (MAI->isAbsoluteDebugSectionOffsets()) {
+  if (Section.isBaseAddressKnownZero()) {
     Asm->OutStreamer.EmitSymbolValue(Label, 4, 0/*AddrSpace*/);
     return;
   }
 
+  // Otherwise, emit it as a label difference from the start of the section.
   Asm->EmitLabelDifference(Label, SectionLabel, 4);
 }
 
diff --git a/llvm/lib/MC/MCAsmInfo.cpp b/llvm/lib/MC/MCAsmInfo.cpp
index 0306dec363f..f0da694a19e 100644
--- a/llvm/lib/MC/MCAsmInfo.cpp
+++ b/llvm/lib/MC/MCAsmInfo.cpp
@@ -60,7 +60,6 @@ MCAsmInfo::MCAsmInfo() {
   LinkOnceDirective = 0;
   HiddenVisibilityAttr = MCSA_Hidden;
   ProtectedVisibilityAttr = MCSA_Protected;
-  AbsoluteDebugSectionOffsets = false;
   HasLEB128 = false;
   HasDotLocAndDotFile = false;
   SupportsDebugInformation = false;
diff --git a/llvm/lib/MC/MCAsmInfoCOFF.cpp b/llvm/lib/MC/MCAsmInfoCOFF.cpp
index e9bc8fa9c3e..7fc7d7abb23 100644
--- a/llvm/lib/MC/MCAsmInfoCOFF.cpp
+++ b/llvm/lib/MC/MCAsmInfoCOFF.cpp
@@ -31,7 +31,6 @@ MCAsmInfoCOFF::MCAsmInfoCOFF() {
 
   // Set up DWARF directives
   HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
-  AbsoluteDebugSectionOffsets = true;
   SupportsDebugInformation = true;
   DwarfSectionOffsetDirective = "\t.secrel32\t";
   HasMicrosoftFastStdCallMangling = true;
diff --git a/llvm/lib/Target/ARM/ARMMCAsmInfo.cpp b/llvm/lib/Target/ARM/ARMMCAsmInfo.cpp
index 20197e487d3..53edfcad930 100644
--- a/llvm/lib/Target/ARM/ARMMCAsmInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMMCAsmInfo.cpp
@@ -58,7 +58,6 @@ ARMELFMCAsmInfo::ARMELFMCAsmInfo() {
   CommentString = "@";
 
   HasLEB128 = true;
-  AbsoluteDebugSectionOffsets = true;
   PrivateGlobalPrefix = ".L";
   WeakRefDirective = "\t.weak\t";
   HasLCOMMDirective = true;
diff --git a/llvm/lib/Target/PowerPC/PPCMCAsmInfo.cpp b/llvm/lib/Target/PowerPC/PPCMCAsmInfo.cpp
index 0be1fa4d94f..3644c79d041 100644
--- a/llvm/lib/Target/PowerPC/PPCMCAsmInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCMCAsmInfo.cpp
@@ -38,7 +38,6 @@ PPCLinuxMCAsmInfo::PPCLinuxMCAsmInfo(bool is64Bit) {
   UsesELFSectionDirectiveForBSS = true;  
 
   // Debug Information
-  AbsoluteDebugSectionOffsets = true;
   SupportsDebugInformation = true;
 
   PCSymbol = ".";
diff --git a/llvm/lib/Target/Sparc/SparcMCAsmInfo.cpp b/llvm/lib/Target/Sparc/SparcMCAsmInfo.cpp
index 53a9bde9252..535c6f7c8a2 100644
--- a/llvm/lib/Target/Sparc/SparcMCAsmInfo.cpp
+++ b/llvm/lib/Target/Sparc/SparcMCAsmInfo.cpp
@@ -22,7 +22,6 @@ SparcELFMCAsmInfo::SparcELFMCAsmInfo(const Target &T, const StringRef &TT) {
   ZeroDirective = "\t.skip\t";
   CommentString = "!";
   HasLEB128 = true;
-  AbsoluteDebugSectionOffsets = true;
   SupportsDebugInformation = true;
   
   SunStyleELFSectionSwitchSyntax = true;
diff --git a/llvm/lib/Target/X86/X86MCAsmInfo.cpp b/llvm/lib/Target/X86/X86MCAsmInfo.cpp
index 1afabc9d9c1..d257ee38c5c 100644
--- a/llvm/lib/Target/X86/X86MCAsmInfo.cpp
+++ b/llvm/lib/Target/X86/X86MCAsmInfo.cpp
@@ -84,7 +84,6 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
   HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
 
   // Debug Information
-  AbsoluteDebugSectionOffsets = true;
   SupportsDebugInformation = true;
 
   // Exceptions handling
diff --git a/llvm/lib/Target/XCore/XCoreMCAsmInfo.cpp b/llvm/lib/Target/XCore/XCoreMCAsmInfo.cpp
index bf785755db4..5f6feae3723 100644
--- a/llvm/lib/Target/XCore/XCoreMCAsmInfo.cpp
+++ b/llvm/lib/Target/XCore/XCoreMCAsmInfo.cpp
@@ -25,6 +25,5 @@ XCoreMCAsmInfo::XCoreMCAsmInfo(const Target &T, const StringRef &TT) {
 
   // Debug
   HasLEB128 = true;
-  AbsoluteDebugSectionOffsets = true;
 }