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add an MCAsmStreamer::EmitFill specialization of EmitFill that

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93889 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-19 18:52:28 +00:00
parent ddf6bdde44
commit 6113b3d323
2 changed files with 18 additions and 4 deletions
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15
lib/MC/MCAsmStreamer.cpp
View File

@ -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) {

7
test/MC/AsmParser/directive_space.s
View File

@ -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: .byte 3
# CHECK: .space 2,3
TEST1:
.space 2, 3