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Fix pr24832.

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It is pretty simple now that the yak is shaved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252105 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-11-05 00:10:08 +00:00
parent 5ff5bdb1d8
commit 11431b640c
4 changed files with 16 additions and 11 deletions
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1
include/llvm/MC/MCObjectStreamer.h
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@ -125,7 +125,6 @@ public:
void EmitGPRel32Value(const MCExpr *Value) override;
void EmitGPRel64Value(const MCExpr *Value) override;
void EmitFill(uint64_t NumBytes, uint8_t FillValue) override;
void EmitZeros(uint64_t NumBytes) override;
void FinishImpl() override;
/// Emit the absolute difference between two symbols if possible.

2
include/llvm/MC/MCStreamer.h
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@ -567,7 +567,7 @@ public:
/// \brief Emit NumBytes worth of zeros.
/// This function properly handles data in virtual sections.
virtual void EmitZeros(uint64_t NumBytes);
void EmitZeros(uint64_t NumBytes);
/// \brief Emit some number of copies of \p Value until the byte alignment \p
/// ByteAlignment is reached.

10
lib/MC/MCObjectStreamer.cpp
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@ -417,18 +417,10 @@ void MCObjectStreamer::EmitGPRel64Value(const MCExpr *Value) {
}
void MCObjectStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
// FIXME: A MCFillFragment would be more memory efficient but MCExpr has
// problems evaluating expressions across multiple fragments.
MCDataFragment *DF = getOrCreateDataFragment();
flushPendingLabels(DF, DF->getContents().size());
DF->getContents().append(NumBytes, FillValue);
}
void MCObjectStreamer::EmitZeros(uint64_t NumBytes) {
const MCSection *Sec = getCurrentSection().first;
assert(Sec && "need a section");
unsigned ItemSize = Sec->isVirtualSection() ? 0 : 1;
insert(new MCFillFragment(0, ItemSize, NumBytes));
insert(new MCFillFragment(FillValue, ItemSize, NumBytes));
}
void MCObjectStreamer::FinishImpl() {

14
test/MC/X86/large-bss.s Normal file
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@ -0,0 +1,14 @@
// RUN: llvm-mc -triple x86_64-pc-linux -filetype=obj %s -o - | llvm-readobj -s | FileCheck %s
.bss
.zero 0x10000000000000
// CHECK: Name: .bss
// CHECK-NEXT: Type: SHT_NOBITS
// CHECK-NEXT: Flags [
// CHECK-NEXT: SHF_ALLOC
// CHECK-NEXT: SHF_WRITE
// CHECK-NEXT: ]
// CHECK-NEXT: Address: 0x0
// CHECK-NEXT: Offset: 0x40
// CHECK-NEXT: Size: 4503599627370496