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| author | Alexey Samsonov <vonosmas@gmail.com> | 2014-09-06 00:41:19 +0000 |
|---|---|---|
| committer | Alexey Samsonov <vonosmas@gmail.com> | 2014-09-06 00:41:19 +0000 |
| commit | ba1ecbc7d399a77b490583c24c8ba658a84b55b8 (patch) | |
| tree | c36dafefeb469cfd42a63f3d03cae412c82c533c /llvm/lib/Support/APFloat.cpp | |
| parent | 091405d7e3ad525f744dfe0990718d6a6f201721 (diff) | |
| download | bcm5719-llvm-ba1ecbc7d399a77b490583c24c8ba658a84b55b8.tar.gz bcm5719-llvm-ba1ecbc7d399a77b490583c24c8ba658a84b55b8.zip | |
Fix right shift by 64 bits detected on CXX/lex/lex.literal/lex.ext/p4.cpp
test case on UBSan bootstrap bot.
This fixes the last failure of "check-clang" in UBSan bootstrap bot.
llvm-svn: 217294
Diffstat (limited to 'llvm/lib/Support/APFloat.cpp')
| -rw-r--r-- | llvm/lib/Support/APFloat.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp index 7989e30afae..097986d3e7c 100644 --- a/llvm/lib/Support/APFloat.cpp +++ b/llvm/lib/Support/APFloat.cpp @@ -3377,7 +3377,9 @@ void APFloat::makeLargest(bool Negative) { // internal consistency. const unsigned NumUnusedHighBits = PartCount*integerPartWidth - semantics->precision; - significand[PartCount - 1] = ~integerPart(0) >> NumUnusedHighBits; + significand[PartCount - 1] = (NumUnusedHighBits < integerPartWidth) + ? (~integerPart(0) >> NumUnusedHighBits) + : 0; } /// Make this number the smallest magnitude denormal number in the given |
