Merging r196771:
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r196771 | majnemer | 2013-12-09 02:44:32 -0800 (Mon, 09 Dec 2013) | 17 lines
[-cxx-abi microsoft] Mangle large integral constants correctly
Testing has revealed that large integral constants (i.e. > INT64_MAX)
are always mangled as-if they are negative, even in places where it
would not make sense for them to be negative (like non-type template
parameters of type unsigned long long).
To address this, we change the way we model number mangling: always
mangle as-if our number is an int64_t. This should result in correct
results when we have large unsigned numbers.
N.B. Bizarrely, things that are 32-bit displacements like vbptr offsets
are mangled as-if they are unsigned 32-bit numbers. This is a pretty
egregious waste of space, it would be a 4x savings if we could mangle it
like a signed 32-bit number. Instead, we explicitly cast these
displacements to uint32_t and let the mangler proceed.
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@196878 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed