Three changes:
1. Convert signed integer types to signless versions.
2. Implement the @sext and @zext parameter attributes. Previously the
type of an function parameter was used to determine whether it should
be sign extended or zero extended before the call. This information is
now communicated via the function type's parameter attributes.
3. The interface to LowerCallTo had to be changed in order to accommodate
the parameter attribute information. Although it would have been
convenient to pass in the FunctionType itself, there isn't always one
present in the caller. Consequently, a signedness indication for the
result type and for each parameter was provided for in the interface
to this method. All implementations were changed to make the adjustment
necessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32788 91177308-0d34-0410-b5e6-96231b3b80d8
This patch replaces signed integer types with signless ones:
1. [US]Byte -> Int8
2. [U]Short -> Int16
3. [U]Int -> Int32
4. [U]Long -> Int64.
5. Removal of isSigned, isUnsigned, getSignedVersion, getUnsignedVersion
and other methods related to signedness. In a few places this warranted
identifying the signedness information from other sources.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32785 91177308-0d34-0410-b5e6-96231b3b80d8
Don't attempt to parse both the old and new grammars. It is near impossible
to get it right. Remove support for the new define keyword and don't
attempt to insert parameter attributes because there isn't enough
contextual information for it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32784 91177308-0d34-0410-b5e6-96231b3b80d8
Update for signless integer types and parameter attribute implementation.
Of significant note:
1. This changes the bytecode format yet again.
2. There are 1/2 as many integer type planes (this is a good thing)
3. GEP indices now use only 1 bit to identify their type which means
more GEP instructions won't be relegated to format 0 (size win)
4. Parameter attributes are implemented but currently being stored
verbosely for each function type. Some other day this needs to be
optimized for size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32783 91177308-0d34-0410-b5e6-96231b3b80d8
Major reorganization. This patch introduces the signedness changes for
the new integer types (i8, i16, i32, i64) which replace the old signed
versions (ubyte, sbyte, ushort, short, etc). This patch also implements
the function type parameter attributes feature. Together these conspired
to introduce new reduce/reduce errors into the grammar. Consequently, it
was necessary to introduce a new keyword into the grammar in order to
disambiguate. Without this, yacc would make incorrect shift/reduce and
reduce/reduce decisions and fail to parse the intended assembly.
Changes in assembly:
1. The "implementation" keyword is superfluous but still supported. You
can use it as a sentry which will ensure there are no remaining up
reference types. However, this is optional as those checks are also
performed elsewhere.
2. Parameter attributes are now implemented using an at sign to
indicate the attribute. The attributes are placed after the type
in a function declaration or after the argument value in a function
call. For example:
i8 @sext %myfunc(i16 @zext)
call i8 @sext %myfunc(i16 @zext %someVal)
The facility is available for supporting additional attributes and
they can be combined using the @(attr1,attr2,attr3) syntax. Right
now the only two supported are @sext and @zext
3. Functions must now be defined with the "define" keyword which is
analagous to the "declare" keyword for function declarations. The
introduction of this keyword disambiguates situations where a
named result type is confused with a new type or gvar definition.
For example:
%MyType = type i16
%MyType %func(%MyType) { ... }
With the introduction of optional parameter attributes between
the function name and the function result type, yacc will pick
the wrong rule to reduce unless it is disambiguated with "define"
before the function definition, as in:
define %MyType @zext %func(%MyType %someArg) { ... }
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32781 91177308-0d34-0410-b5e6-96231b3b80d8
* Change integer type name from signed to signless
* Implement printing of FunctionType parameter attributes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32778 91177308-0d34-0410-b5e6-96231b3b80d8
Add a new feature to FunctionType, Parameter Attributes. This allows tags
such as "sext" and "zext" to be associated with a faunction's arguments
or return type. This allows signedness information to be carried forward
from the frontend to the backend for arguments and result types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32776 91177308-0d34-0410-b5e6-96231b3b80d8
depend on the compiler. This works around problems in the Stacker runtime
when the CFE changes in such a way that the assembly file needs to be
updated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32773 91177308-0d34-0410-b5e6-96231b3b80d8
Fix several bugs and update for new assembly syntax. Changes made include:
1. Fixing rules for icmp/fcmp instructions to not require a closing paren
at the end. This was a cut-and-paste error from a previous commit.
2. Changing things like Out << " " to Out << ' '
3. Adding the "define" keyword for function definitions
4. Adding support for packed structures
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32771 91177308-0d34-0410-b5e6-96231b3b80d8
Remove all grammar conflicts from assembly parsing. This change involves:
1. Making the "type" keyword not a primitive type (removes several
reduce/reduce conflicts)
2. Being more specific about which linkage types are allowed for functions
and global variables. In particular "appending" can no longer be
specified for a function. A differentiation was made between the various
internal and external linkage types.
3. Introduced the "define" keyword which is now required when defining a
function. This disambiguates several cases where a named function return
type could get confused with the definition of a new type. Using the
keyword eliminates all shift/reduce conflicts and the remaining
reduce/reduce conflicts.
These changes are necessary to implement the function parameter attributes
that will be introduced soon. Adding the function parameter attributes in
the presence of the shift/reduce and reduce/reduce conflicts led to severe
ambiguities that caused the parser to report syntax errors that needed to
be resolved. This patch resolves them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32770 91177308-0d34-0410-b5e6-96231b3b80d8
1. Make the arguments const like the other ConstantFold* functions.
2. Clean up evaluateFCmpRelation so it makes sense for floating point.
3. Implement the use of evaluateFCmpRelation to fold floating point CEs
4. Shorten a variable name so more things fit on one line.
5. Fix various comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32759 91177308-0d34-0410-b5e6-96231b3b80d8
Fix this by ensuring that a bitcast is inserted to do sign switching. This
is only temporarily needed as the merging of signed and unsigned is next
on the SignlessTypes plate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32757 91177308-0d34-0410-b5e6-96231b3b80d8
Don't allow CmpInst instances to be processed in FoldSelectOpOp because
you can't easily swap their operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32753 91177308-0d34-0410-b5e6-96231b3b80d8
This patch removes the SetCC instructions and replaces them with the ICmp
and FCmp instructions. The SetCondInst instruction has been removed and
been replaced with ICmpInst and FCmpInst.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32751 91177308-0d34-0410-b5e6-96231b3b80d8
