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Reserve some constant values for the Swift calling convention.

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Swift has a custom calling convention that also requires some new flags
on arguments and one new attribute on alloca instructions. This patch
does not include the implementation of that calling convention - that
will be provided as part of the open-source release of Swift; this only
reserves the bitcode constant values so that they are not used for
other purposes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243379 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2015-07-28 04:05:45 +00:00
parent d9408bca26
commit b25dcfd104
4 changed files with 10 additions and 1 deletions
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2
lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -4081,6 +4081,8 @@ std::error_code BitcodeReader::parseFunctionBody(Function *F) {
uint64_t AlignRecord = Record[3];
const uint64_t InAllocaMask = uint64_t(1) << 5;
const uint64_t ExplicitTypeMask = uint64_t(1) << 6;
// Reserve bit 7 for SwiftError flag.
// const uint64_t SwiftErrorMask = uint64_t(1) << 7;
const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask;
bool InAlloca = AlignRecord & InAllocaMask;
Type *Ty = getTypeByID(Record[0]);