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IR: Add helper to split debug info flags bitfield

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Split debug info 'flags' bitfield over a vector so the current flags can
be iterated over.  This API (in combination with r230107) will be used
for assembly support for symbolic constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230108 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-02-21 00:45:26 +00:00
parent 2e19fabc26
commit 8629ae24e7
3 changed files with 52 additions and 0 deletions
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21
unittests/IR/DebugInfoTest.cpp
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@@ -111,4 +111,25 @@ TEST(DIDescriptorTest, getFlagString) {
EXPECT_EQ(StringRef(), DIDescriptor::getFlagString(0xffff));
}
TEST(DIDescriptorTest, splitFlags) {
// Some valid flags.
#define CHECK_SPLIT(FLAGS, VECTOR, REMAINDER) \
{ \
SmallVector<unsigned, 8> V; \
EXPECT_EQ(REMAINDER, DIDescriptor::splitFlags(FLAGS, V)); \
EXPECT_TRUE(makeArrayRef(V).equals VECTOR); \
}
CHECK_SPLIT(DIDescriptor::FlagPublic, (DIDescriptor::FlagPublic), 0u);
CHECK_SPLIT(DIDescriptor::FlagProtected, (DIDescriptor::FlagProtected), 0u);
CHECK_SPLIT(DIDescriptor::FlagPrivate, (DIDescriptor::FlagPrivate), 0u);
CHECK_SPLIT(DIDescriptor::FlagVector, (DIDescriptor::FlagVector), 0u);
CHECK_SPLIT(DIDescriptor::FlagRValueReference, (DIDescriptor::FlagRValueReference), 0u);
CHECK_SPLIT(DIDescriptor::FlagFwdDecl | DIDescriptor::FlagVector,
(DIDescriptor::FlagFwdDecl, DIDescriptor::FlagVector), 0u);
CHECK_SPLIT(0x100000u, (), 0x100000u);
CHECK_SPLIT(0x100000u | DIDescriptor::FlagVector, (DIDescriptor::FlagVector),
0x100000u);
#undef CHECK_SPLIT
}
} // end namespace