move uleb/sleb printing into AsmPrinter from DwarfPrinter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100344 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 71 insertions, 0 deletions

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
new file mode 100644
index 0000000000..187148cddb
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -0,0 +1,71 @@
+//===-- AsmPrinterDwarf.cpp - AsmPrinter Dwarf Support --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Dwarf emissions parts of AsmPrinter.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/Twine.h"
+using namespace llvm;
+
+/// EmitSLEB128 - emit the specified signed leb128 value.
+void AsmPrinter::EmitSLEB128(int Value, const char *Desc) const {
+  if (isVerbose() && Desc)
+    OutStreamer.AddComment(Desc);
+    
+  if (MAI->hasLEB128()) {
+    // FIXME: MCize.
+    OutStreamer.EmitRawText("\t.sleb128\t" + Twine(Value));
+    return;
+  }
+
+  // If we don't have .sleb128, emit as .bytes.
+  int Sign = Value >> (8 * sizeof(Value) - 1);
+  bool IsMore;
+  
+  do {
+    unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
+    Value >>= 7;
+    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
+    if (IsMore) Byte |= 0x80;
+    OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
+  } while (IsMore);
+}
+
+/// EmitULEB128 - emit the specified signed leb128 value.
+void AsmPrinter::EmitULEB128(unsigned Value, const char *Desc,
+                             unsigned PadTo) const {
+  if (isVerbose() && Desc)
+    OutStreamer.AddComment(Desc);
+ 
+  if (MAI->hasLEB128() && PadTo == 0) {
+    // FIXME: MCize.
+    OutStreamer.EmitRawText("\t.uleb128\t" + Twine(Value));
+    return;
+  }
+  
+  // If we don't have .uleb128 or we want to emit padding, emit as .bytes.
+  do {
+    unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
+    Value >>= 7;
+    if (Value || PadTo != 0) Byte |= 0x80;
+    OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
+  } while (Value);
+
+  if (PadTo) {
+    if (PadTo > 1)
+      OutStreamer.EmitFill(PadTo - 1, 0x80/*fillval*/, 0/*addrspace*/);
+    OutStreamer.EmitFill(1, 0/*fillval*/, 0/*addrspace*/);
+  }
+}
+