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Fix overflowing signed left shift, found by ubsan buildbot.

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This commit is contained in:
Richard Smith 2021-02-03 12:51:11 -08:00
parent 65e46aa23b
commit d38c68eaec
1 changed files with 1 additions and 1 deletions
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2
include/llvm/Support/LEB128.h
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@ -176,7 +176,7 @@ inline int64_t decodeSLEB128(const uint8_t *p, unsigned *n = nullptr,
return 0;
}
Byte = *p;
int64_t Slice = Byte & 0x7f;
uint64_t Slice = Byte & 0x7f;
if ((Shift >= 64 && Slice != (Value < 0 ? 0x7f : 0x00)) ||
(Shift == 63 && Slice != 0 && Slice != 0x7f)) {
if (error)