Partially fixes PR24883.
The patch sets Reference bit while instantiating a typedef if it
previously was found referenced.
Reviewed By: thakis
Differential Revision: https://reviews.llvm.org/D114382
Based on post-commit review discussion on
2bd8493847 with Richard Smith.
Other uses of forcing HasEmptyPlaceHolder to false seem OK to me -
they're all around pointer/reference types where the pointer/reference
token will appear at the rightmost side of the left side of the type
name, so they make nested types (eg: the "int" in "int *") behave as
though there is a non-empty placeholder (because the "*" is essentially
the placeholder as far as the "int" is concerned).
This was originally committed in 277623f4d5
Reverted in f9ad1d1c77 due to breakages
outside of clang - lldb seems to have some strange/strong dependence on
"char [N]" versus "char[N]" when printing strings (not due to that name
appearing in DWARF, but probably due to using clang to stringify type
names) that'll need to be addressed, plus a few other odds and ends in
other subprojects (clang-tools-extra, compiler-rt, etc).
Looks like lldb has some issues with this - somehow it causes lldb to
treat a "char[N]" type as an array of chars (prints them out
individually) but a "char [N]" is printed as a string. (even though the
DWARF doesn't have this string in it - it's something to do with the
string lldb generates for itself using clang)
This reverts commit 277623f4d5.
Based on post-commit review discussion on
2bd8493847 with Richard Smith.
Other uses of forcing HasEmptyPlaceHolder to false seem OK to me -
they're all around pointer/reference types where the pointer/reference
token will appear at the rightmost side of the left side of the type
name, so they make nested types (eg: the "int" in "int *") behave as
though there is a non-empty placeholder (because the "*" is essentially
the placeholder as far as the "int" is concerned).
In some cases, a typedef only strips aways a keyword for a type, keeping the
same name as the root record type. This causes some confusion when the type
is defined in one modules but only forward declared in another. Skipping the
typedef and going straight to the record will avoid this issue.
typedef struct S {} S;
S* s; // S is TypedefType here
struct S;
S* s; // S is RecordType here
llvm-svn: 364119
When a FunctionProtoType is in the original type in a DecayedType, the decayed
type is a PointerType which points back the original FunctionProtoType. The
visitor for ODRHashing will attempt to process both Type's, doing double work.
By chaining together multiple DecayedType's and FunctionProtoType's, this would
result in 2^N Type's visited only N DecayedType's and N FunctionProtoType's
exsit. Another bug where VisitDecayedType and VisitAdjustedType did
redundant work doubled the work at each level, giving 4^N Type's visited. This
patch removed the double work and detects when a FunctionProtoType decays to
itself to only check the Type once. This lowers the exponential runtime to
linear runtime. Fixes https://bugs.llvm.org/show_bug.cgi?id=41625
llvm-svn: 359960
This test uses enums, which have different behavior when targeting different
systems. Specifying a triple will give predictable behavior to this test.
llvm-svn: 341496
Functions that are a sub-Decl of a record were hashed differently than other
functions. This change keeps the AddFunctionDecl function and the hash of
records now calls this function. In addition, AddFunctionDecl has an option
to perform a hash as if the body was absent, which is required for some
checks after loading modules. Additional logic prevents multiple error
message from being printed.
llvm-svn: 336632
Avoid storing information for definitions since those can be out-of-line and
vary between modules even when the declarations are the same.
llvm-svn: 334151
commit 519b97132a4c960e8dedbfe4290d86970d92e995
Author: Richard Trieu <rtrieu@google.com>
Date: Sat Mar 24 00:52:44 2018 +0000
[ODRHash] Support pointer and reference types.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@328404 91177308-0d34-0410-b5e6-96231b3b80d8
As it's breaking some tests. I've communicated with Richard offline about testcases.
llvm-svn: 329001
Extend the hashing to functions, which allows detection of function definition
mismatches across modules. This is a re-commit of r320230.
llvm-svn: 321395
Add a mix of postive and negative tests to check that wrong Decls won't be
flagged in the diagnostic. Split the check everything test and moved the
pieces closer to where the related tests are.
llvm-svn: 317394
FunctionDecl already hashes most of the information in the function's type.
Add hashing of the return type, and skip hashing the function's type to avoid
redundancy and extra work when computing the hash.
llvm-svn: 307986
These VarDecl's are static data members of classes. Since the initializers are
also hashed, this also provides checking for default arguments to methods.
llvm-svn: 305543
Kristina Bessonova