AsmParser: Don't crash on short hex constants for fp128 types
If we see 0xL01, treat it like 0xL00000000000000000000000000000001
instead of crashing.
llvm-svn: 223811
diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index 614a283..d2ed616e 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -78,13 +78,15 @@
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);
}
diff --git a/llvm/test/Assembler/short-hexpair.ll b/llvm/test/Assembler/short-hexpair.ll
new file mode 100644
index 0000000..067ea30
--- /dev/null
+++ b/llvm/test/Assembler/short-hexpair.ll
@@ -0,0 +1,4 @@
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+
+@x = global fp128 0xL01
+; CHECK: @x = global fp128 0xL00000000000000000000000000000001