[MC] Support symbolic expressions in assembly directives
This matches the behavior of GNU assembler which supports symbolic
expressions in absolute expressions used in assembly directives.
Differential Revision: http://reviews.llvm.org/D20752
llvm-svn: 271102
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 59bbc2e..9ed5a5f 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -135,9 +135,18 @@
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
- const MCExpr *E = MCConstantExpr::create(FillValue, getContext());
for (uint64_t i = 0, e = NumBytes; i != e; ++i)
- EmitValue(E, 1);
+ EmitIntValue(FillValue, 1);
+}
+
+void MCStreamer::emitFill(uint64_t NumValues, int64_t Size, int64_t Expr) {
+ int64_t NonZeroSize = Size > 4 ? 4 : Size;
+ Expr &= ~0ULL >> (64 - NonZeroSize * 8);
+ for (uint64_t i = 0, e = NumValues; i != e; ++i) {
+ EmitIntValue(Expr, NonZeroSize);
+ if (NonZeroSize < Size)
+ EmitIntValue(0, Size - NonZeroSize);
+ }
}
/// The implementation in this class just redirects to EmitFill.
@@ -757,6 +766,9 @@
}
void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::emitFill(const MCExpr &NumBytes, uint64_t Value, SMLoc Loc) {}
+void MCStreamer::emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
+ SMLoc Loc) {}
void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
unsigned ValueSize,
unsigned MaxBytesToEmit) {}