add an MCAsmStreamer::EmitFill specialization of EmitFill that

emits one directive instead of N.  Not doing this would be a
significant regression on the # bytes generated by .fill.

llvm-svn: 93889

llvm/lib/MC/MCAsmStreamer.cpp

@@ -61,6 +61,7 @@ public:
   virtual void EmitBytes(StringRef Data);
 
   virtual void EmitValue(const MCExpr *Value, unsigned Size);
+  virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue);
 
   virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
                                     unsigned ValueSize = 1,
@@ -199,6 +200,20 @@ void MCAsmStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
   OS << ' ' << *truncateToSize(Value, Size) << '\n';
 }
 
+/// EmitFill - Emit NumBytes bytes worth of the value specified by
+/// FillValue.  This implements directives such as '.space'.
+void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
+  if (const char *ZeroDirective = MAI.getZeroDirective()) {
+    OS << ZeroDirective << NumBytes;
+    if (FillValue != 0)
+      OS << ',' << (int)FillValue;
+    OS << '\n';
+  } else {
+    // Emit a byte at a time.
+    MCStreamer::EmitFill(NumBytes, FillValue);
+  }
+}
+
 void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
                                          unsigned ValueSize,
                                          unsigned MaxBytesToEmit) {

llvm/test/MC/AsmParser/directive_space.s

@@ -1,12 +1,11 @@
-# RUN: llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
+# RUN: llvm-mc -triple i386-apple-darwin %s | FileCheck %s
 
 # CHECK: TEST0:
-# CHECK: .byte 0
+# CHECK: .space 1
 TEST0:  
         .space 1
 
 # CHECK: TEST1:
-# CHECK: .byte 3
+# CHECK: .space	2,3
-# CHECK: .byte 3
 TEST1:  
         .space 2, 3