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[Bitcode] Replace hand-coded little endian handling with Endian.h functions.

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No functional change intended.

llvm-svn: 239944
This commit is contained in:
Benjamin Kramer 2015-06-17 20:55:30 +00:00
parent c967f7ea18
commit 3c31aa885c
3 changed files with 8 additions and 22 deletions
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14
include/llvm/Bitcode/BitstreamWriter.h
View File

@ -63,10 +63,7 @@ class BitstreamWriter {
// BackpatchWord - Backpatch a 32-bit word in the output with the specified
// value.
void BackpatchWord(unsigned ByteNo, unsigned NewWord) {
Out[ByteNo++] = (unsigned char)(NewWord >> 0);
Out[ByteNo++] = (unsigned char)(NewWord >> 8);
Out[ByteNo++] = (unsigned char)(NewWord >> 16);
Out[ByteNo ] = (unsigned char)(NewWord >> 24);
support::endian::write32le(&Out[ByteNo], NewWord);
}
void WriteByte(unsigned char Value) {
@ -74,12 +71,9 @@ class BitstreamWriter {
}
void WriteWord(unsigned Value) {
unsigned char Bytes[4] = {
(unsigned char)(Value >> 0),
(unsigned char)(Value >> 8),
(unsigned char)(Value >> 16),
(unsigned char)(Value >> 24) };
Out.append(&Bytes[0], &Bytes[4]);
Value = support::endian::byte_swap<uint32_t, support::little>(Value);
Out.append(reinterpret_cast<const char *>(&Value),
reinterpret_cast<const char *>(&Value + 1));
}
unsigned GetBufferOffset() const {

11
include/llvm/Bitcode/ReaderWriter.h
View File

@ -15,6 +15,7 @@
#define LLVM_BITCODE_READERWRITER_H
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>
@ -133,14 +134,8 @@ namespace llvm {
// Must contain the header!
if (BufEnd-BufPtr < KnownHeaderSize) return true;
unsigned Offset = ( BufPtr[OffsetField ] |
(BufPtr[OffsetField+1] << 8) |
(BufPtr[OffsetField+2] << 16) |
(BufPtr[OffsetField+3] << 24));
unsigned Size = ( BufPtr[SizeField ] |
(BufPtr[SizeField +1] << 8) |
(BufPtr[SizeField +2] << 16) |
(BufPtr[SizeField +3] << 24));
unsigned Offset = support::endian::read32le(&BufPtr[OffsetField]);
unsigned Size = support::endian::read32le(&BufPtr[SizeField]);
// Verify that Offset+Size fits in the file.
if (VerifyBufferSize && Offset+Size > unsigned(BufEnd-BufPtr))

5
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -2406,10 +2406,7 @@ enum {
static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
uint32_t &Position) {
Buffer[Position + 0] = (unsigned char) (Value >> 0);
Buffer[Position + 1] = (unsigned char) (Value >> 8);
Buffer[Position + 2] = (unsigned char) (Value >> 16);
Buffer[Position + 3] = (unsigned char) (Value >> 24);
support::endian::write32le(&Buffer[Position], Value);
Position += 4;
}