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Fix PR212 - Bytecode reader misreads 'long -9223372036854775808'!

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Fix testcase test/Regression/Assembler/2004-01-20-MaxLongLong.llx


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10928 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-20 19:13:07 +00:00
parent 78c146ffc5
commit 62f8bf0566
1 changed files with 7 additions and 3 deletions
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10
lib/Bytecode/Reader/ReaderPrimitives.h
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@ -59,9 +59,13 @@ namespace llvm {
static inline int64_t read_vbr_int64(const unsigned char *&Buf, static inline int64_t read_vbr_int64(const unsigned char *&Buf,
const unsigned char *EndBuf) { const unsigned char *EndBuf) {
uint64_t R = read_vbr_uint64(Buf, EndBuf); uint64_t R = read_vbr_uint64(Buf, EndBuf);
if (R & 1) if (R & 1) {
return -(int64_t)(R >> 1); if (R != 1)
else return -(int64_t)(R >> 1);
else // There is no such thing as -0 with integers. "-0" really means
// 0x8000000000000000.
return 1LL << 63;
} else
return (int64_t)(R >> 1); return (int64_t)(R >> 1);
} }