Revert rL350048 and rL350050

These patches have broken almost all buildbots on test
DebugInfo/X86/addr_comments.ll. Reverting to green.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350052 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/AddressPool.cpp b/lib/CodeGen/AsmPrinter/AddressPool.cpp
index c57e3021710ff720c99e825b7067e24030dd70ba..042243b79259195a3a482470b9b7ae7a70ea6a97 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AddressPool.cpp
+++ b/lib/CodeGen/AsmPrinter/AddressPool.cpp
@@ -24,23 +24,21 @@ unsigned AddressPool::getIndex(const MCSymbol *Sym, bool TLS) {
   return IterBool.first->second.Number;
 }
 
-MCSymbol *AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
+
+void AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
   static const uint8_t AddrSize = Asm.getDataLayout().getPointerSize();
-  StringRef Prefix = "debug_addr_";
-  MCSymbol *BeginLabel = Asm.createTempSymbol(Prefix + "start");
-  MCSymbol *EndLabel = Asm.createTempSymbol(Prefix + "end");
+  uint64_t Length = sizeof(uint16_t) // version
+                  + sizeof(uint8_t)  // address_size
+                  + sizeof(uint8_t)  // segment_selector_size
+                  + AddrSize * Pool.size(); // entries
   Asm.OutStreamer->AddComment("Length of contribution");
-  Asm.EmitLabelDifference(EndLabel, BeginLabel,
-                          4); // TODO: Support DWARF64 format.
-  Asm.OutStreamer->EmitLabel(BeginLabel);
+  Asm.emitInt32(Length); // TODO: Support DWARF64 format.
   Asm.OutStreamer->AddComment("DWARF version number");
   Asm.emitInt16(Asm.getDwarfVersion());
   Asm.OutStreamer->AddComment("Address size");
   Asm.emitInt8(AddrSize);
   Asm.OutStreamer->AddComment("Segment selector size");
   Asm.emitInt8(0); // TODO: Support non-zero segment_selector_size.
-
-  return EndLabel;
 }
 
 // Emit addresses into the section given.
@@ -51,10 +49,8 @@ void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
   // Start the dwarf addr section.
   Asm.OutStreamer->SwitchSection(AddrSection);
 
-  MCSymbol *EndLabel = nullptr;
-
   if (Asm.getDwarfVersion() >= 5)
-    EndLabel = emitHeader(Asm, AddrSection);
+    emitHeader(Asm, AddrSection);
 
   // Define the symbol that marks the start of the contribution.
   // It is referenced via DW_AT_addr_base.
@@ -71,7 +67,4 @@ void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
 
   for (const MCExpr *Entry : Entries)
     Asm.OutStreamer->EmitValue(Entry, Asm.getDataLayout().getPointerSize());
-
-  if (EndLabel)
-    Asm.OutStreamer->EmitLabel(EndLabel);
 }

diff --git a/lib/CodeGen/AsmPrinter/AddressPool.h b/lib/CodeGen/AsmPrinter/AddressPool.h
index 44a53b02f487c31188dd7de2c5b5ef2f02e91fe2..2209c7eb50edc3de78b8527e4a32beb5ec2e8478 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AddressPool.h
+++ b/lib/CodeGen/AsmPrinter/AddressPool.h
@@ -55,7 +55,7 @@ public:
   void setLabel(MCSymbol *Sym) { AddressTableBaseSym = Sym; }
 
 private:
-  MCSymbol *emitHeader(AsmPrinter &Asm, MCSection *Section);
+  void emitHeader(AsmPrinter &Asm, MCSection *Section);
 
   /// Symbol designates the start of the contribution to the address table.
   MCSymbol *AddressTableBaseSym = nullptr;

diff --git a/test/DebugInfo/X86/addr_comments.ll b/test/DebugInfo/X86/addr_comments.ll
index 487973d2267b401a2eb711dc505e1e2cf7a18d51..780b37915a4b504e1ae082daeeadcda5689d1c8e 100644 (file)
--- a/test/DebugInfo/X86/addr_comments.ll
+++ b/test/DebugInfo/X86/addr_comments.ll
@@ -1,14 +1,12 @@
 ; RUN: llc %s -mtriple=i386-unknown-linux-gnu -filetype=asm -o - | FileCheck %s
 
-; CHECK:      .section .debug_addr
-; CHECK-NEXT:   .long   .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
-; CHECK-NEXT: .Ldebug_addr_startt 0:
-; CHECK-NEXT:   .short  5 # DWARF version number
-; CHECK-NEXT:   .byte   4 # Address size
-; CHECK-NEXT:   .byte   0 # Segment selector size
-; CHECK-NEXT: .Laddr_table_base0:
-; CHECK-NEXT:   .long   .Lfunc_begin0
-; CHECK-NEXT: .Ldebug_addr_end0:
+; CHECK:   .section .debug_addr
+; CHECK:   .long   8 # Length of contribution
+; CHECK:   .short  5 # DWARF version number
+; CHECK:   .byte   4 # Address size
+; CHECK:   .byte   0 # Segment selector size
+; CHECK: .Laddr_table_base0:
+; CHECK:   .long   .Lfunc_begin0
  
 ; Function Attrs: noinline nounwind optnone uwtable
 define dso_local void @foo() #0 !dbg !7 {