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Revert "Verify sizes when trying to read a VBR"

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This reverts r234984 since it seems to break some bots (most of them
seemed arm*-selfhost).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234998 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas
2015-04-15 11:10:17 +00:00
parent e3d79bbe9f
commit f72ee4c275
4 changed files with 0 additions and 8 deletions
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1
include/llvm/Bitcode/BitstreamReader.h
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@@ -395,7 +395,6 @@ public:
// Read a VBR that may have a value up to 64-bits in size. The chunk size of // Read a VBR that may have a value up to 64-bits in size. The chunk size of
// the VBR must still be <= 32 bits though. // the VBR must still be <= 32 bits though.
uint64_t ReadVBR64(unsigned NumBits) { uint64_t ReadVBR64(unsigned NumBits) {
assert(NumBits <= 64 && "VBR can only be up to 64 bits in size.");
uint32_t Piece = Read(NumBits); uint32_t Piece = Read(NumBits);
if ((Piece & (1U << (NumBits-1))) == 0) if ((Piece & (1U << (NumBits-1))) == 0)
return uint64_t(Piece); return uint64_t(Piece);

2
lib/Bitcode/Reader/BitstreamReader.cpp
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@@ -62,8 +62,6 @@ static uint64_t readAbbreviatedField(BitstreamCursor &Cursor,
case BitCodeAbbrevOp::Fixed: case BitCodeAbbrevOp::Fixed:
return Cursor.Read((unsigned)Op.getEncodingData()); return Cursor.Read((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::VBR: case BitCodeAbbrevOp::VBR:
if ((unsigned)Op.getEncodingData() > 64)
report_fatal_error("Invalid record");
return Cursor.ReadVBR64((unsigned)Op.getEncodingData()); return Cursor.ReadVBR64((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::Char6: case BitCodeAbbrevOp::Char6:
return BitCodeAbbrevOp::DecodeChar6(Cursor.Read(6)); return BitCodeAbbrevOp::DecodeChar6(Cursor.Read(6));

BIN
test/Bitcode/Inputs/invalid-VBR-too-big.bc
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5
test/Bitcode/invalid.test
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@@ -55,8 +55,3 @@ RUN: not llvm-dis -disable-output %p/Inputs/invalid-no-proper-module.bc 2>&1 | \
RUN: FileCheck --check-prefix=NO-MODULE %s RUN: FileCheck --check-prefix=NO-MODULE %s
NO-MODULE: Malformed IR file NO-MODULE: Malformed IR file
RUN: not llvm-dis -disable-output %p/Inputs/invalid-VBR-too-big.bc 2>&1 | \
RUN: FileCheck --check-prefix=HUGE-VBR %s
HUGE-VBR: Invalid record