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Fix ubsan error that shift amount 64 is too large.

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llvm-svn: 316863
This commit is contained in:
Rui Ueyama
2017-10-29 16:49:42 +00:00
parent ac6472535b
commit b6f4e722b1
1 changed files with 3 additions and 1 deletions
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4
lld/ELF/InputFiles.cpp
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@@ -763,7 +763,9 @@ template <class ELFT> void SharedFile<ELFT>::parseRest() {
// files because the loader takes care of it. However, if we promote a
// DSO symbol to point to .bss due to copy relocation, we need to keep
// the original alignment requirements. We infer it here.
uint32_t Alignment = 1ULL << countTrailingZeros((uint64_t)Sym.st_value);
uint32_t Alignment = 1;
if (Sym.st_value)
Alignment = 1ULL << countTrailingZeros((uint64_t)Sym.st_value);
if (0 < Sym.st_shndx && Sym.st_shndx < Sections.size()) {
uint32_t SecAlign = Sections[Sym.st_shndx].sh_addralign;
Alignment = std::min(Alignment, SecAlign);