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AsmParser: Don't crash on short hex constants for fp128 types

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If we see 0xL01, treat it like 0xL00000000000000000000000000000001
instead of crashing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223811 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2014-12-09 19:10:03 +00:00
parent f700a24774
commit 0247b81ef6
2 changed files with 11 additions and 5 deletions
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12
lib/AsmParser/LLLexer.cpp
View File

@ -78,13 +78,15 @@ uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) {
void LLLexer::HexToIntPair(const char *Buffer, const char *End,
uint64_t Pair[2]) {
Pair[0] = 0;
for (int i=0; i<16; i++, Buffer++) {
assert(Buffer != End);
Pair[0] *= 16;
Pair[0] += hexDigitValue(*Buffer);
if (End - Buffer >= 16) {
for (int i = 0; i < 16; i++, Buffer++) {
assert(Buffer != End);
Pair[0] *= 16;
Pair[0] += hexDigitValue(*Buffer);
}
}
Pair[1] = 0;
for (int i=0; i<16 && Buffer != End; i++, Buffer++) {
for (int i = 0; i < 16 && Buffer != End; i++, Buffer++) {
Pair[1] *= 16;
Pair[1] += hexDigitValue(*Buffer);
}

4
test/Assembler/short-hexpair.ll Normal file
View File

@ -0,0 +1,4 @@
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
@x = global fp128 0xL01
; CHECK: @x = global fp128 0xL00000000000000000000000000000001