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path: root/lib/CodeGen/CGExprAgg.cpp
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2011-06-17Implement proper support for generating code for compound literals inDouglas Gregor
C++, which means: - binding the temporary as needed in Sema, so that we generate the appropriate call to the destructor, and - emitting the compound literal into the appropriate location for the aggregate, rather than trying to emit it as a temporary and memcpy() it. Fixes PR10138 / <rdar://problem/9615901>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133235 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-16Restore correct use of GC barriers.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133144 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-15Automatic Reference Counting.John McCall
Language-design credit goes to a lot of people, but I particularly want to single out Blaine Garst and Patrick Beard for their contributions. Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself, in no particular order. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133103 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-09Rename "hasTrivialConstructor" to "hasTrivialDefaultConstructor" andSean Hunt
modify the semantics slightly to accomodate default constructors (I hope). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131087 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29removes a meaningless comment.Fariborz Jahanian
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130550 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29block variables on lhs need be ir-gen'ed after theFariborz Jahanian
rhs when its 'forwarding' pointer may be modified in rhs evaluation as result of call to Block_copy. // rdar://9309454 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130545 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Cut down unnecessary zero'ing when value-initializing arrays of C++ objects.Argyrios Kyrtzidis
-C++ objects with user-declared constructor don't need zero'ing. -We can zero-initialize arrays of C++ objects in "bulk" now, in which case don't zero-initialize each object again. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130453 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Get the base element type even in multidimensional arrays.Argyrios Kyrtzidis
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130427 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28When value-initializing the elements of an array not not included in the ↵Argyrios Kyrtzidis
initializer make sure that a non-trivial C++ constructor gets called. Fixes rdar://9347552 & http://llvm.org/PR9801 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130421 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Convert size and alignment variables to CharUnits in EmitAggregateCopy(). NoKen Dyck
change in functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130113 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Convert type size and alignment to CharUnits in CheckAggExprForMemSetUse().Ken Dyck
No change in functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130112 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Convert the return type of GetNumNonZeroBytesInInit() to CharUnits. NoKen Dyck
change in functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130111 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Eliminate some literal 8s by converting size variables in EmitGCMove() andKen Dyck
EmitFinalDestCopy() to CharUnits. No change in functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130110 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Replace calls to ASTContext::getTypeInfo() with calls toKen Dyck
ASTContext::getTypeSize() when only the size part is used. No change in functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130109 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-21ForArgyrios Kyrtzidis
double data[20000000] = {0}; we would blow out the memory by creating 20M Exprs to fill out the initializer. To fix this, if the initializer list initializes an array with more elements than there are initializers in the list, have InitListExpr store a single 'ArrayFiller' expression that specifies an expression to be used for value initialization of the rest of the elements. Fixes rdar://9275920. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129896 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15C1X: implement generic selectionsPeter Collingbourne
As an extension, generic selection support has been added for all supported languages. The syntax is the same as for C1X. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129554 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12We can't emit an aggregate cast as its sub-expression in general justJohn McCall
because the result is ignored. The particular example here is with property l-values, but there could be all sorts of lovely casts that this isn't safe for. Sink the check into the one case that seems to actually be capable of honoring this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129397 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12After some discussion with Doug, we decided that it made a lot more senseJohn McCall
for __unknown_anytype resolution to destructively modify the AST. So that's what it does now, which significantly simplifies some of the implementation. Normal member calls work pretty cleanly now, and I added support for propagating unknown-ness through &. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129331 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11More __unknown_anytype work.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129269 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Remove CK_DynamicToNull.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129265 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-10As a first step towards fixing PR9641, add a CK_DynamicToNull cast kind whichAnders Carlsson
represents a dynamic cast where we know that the result is always null. For example: struct A { virtual ~A(); }; struct B final : A { }; struct C { }; bool f(B* b) { return dynamic_cast<C*>(b); } git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129256 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07Basic, untested implementation for an "unknown any" type requested by LLDB.John McCall
The idea is that you can create a VarDecl with an unknown type, or a FunctionDecl with an unknown return type, and it will still be valid to access that object as long as you explicitly cast it at every use. I'm still going back and forth about how I want to test this effectively, but I wanted to go ahead and provide a skeletal implementation for the LLDB folks' benefit and because it also improves some diagnostic goodness for placeholder expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129065 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30Fix IRGen issues related to using property-dot syntaxFariborz Jahanian
for prperty reference types. // rdar://9208606. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128551 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17Change the representation of GNU ?: expressions to use a different expressionJohn McCall
class and to bind the shared value using OpaqueValueExpr. This fixes an unnoticed problem with deserialization of these expressions where the deserialized form would lose the vital pointer-equality trait; or rather, it fixes it because this patch also does the right thing for deserializing OVEs. Change OVEs to not be a "temporary object" in the sense that copy elision is permitted. This new representation is not totally unawkward to work with, but I think that's really part and parcel with the semantics we're modelling here. In particular, it's much easier to fix things like the copy elision bug and to make the CFG look right. I've tried to update the analyzer to deal with this in at least some obvious cases, and I think we get a much better CFG out, but the printing of OpaqueValueExprs probably needs some work. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125744 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-16Save a copy expression for non-trivial copy constructions of catch variables.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125661 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-08Reorganize CodeGen{Function,Module} to eliminate the unfortunateJohn McCall
Block{Function,Module} base class. Minor other refactorings. Fixed a few address-space bugs while I was there. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125085 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-26Better framework for conditional cleanups; untested as yet.John McCall
I'm separately committing this because it incidentally changes some block orderings and minor IR issues, like using a phi instead of an unnecessary alloca. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124277 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13Ensure an insertion point at the end of a statement-expression.John McCall
Fixes PR8967. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123360 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-30Simplify mem{cpy, move, set} creation with IRBuilder.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122634 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-06Rename CXXExprWithTemporaries -> ExprWithCleanups; there's no theoreticalJohn McCall
reason this is limited to C++, and it's certainly not limited to temporaries. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120996 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-06__block variables require us to evaluate the RHS of an assignment beforeJohn McCall
the LHS, or else the pointer might be invalid. This is kindof dumb, but go ahead and make sure we're doing that for l-value scalar assignment, which fixes a miscompile of obj-c++.dg/block-seq.mm. Leave a FIXME for how to solve this problem for agg __blocks. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120992 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-05Fix a bug in the emission of __real/__imag l-values on scalar operands.John McCall
Fix a bug in the emission of complex compound assignment l-values. Introduce a method to emit an expression whose value isn't relevant. Make that method evaluate its operand as an l-value if it is one. Fixes our volatile compliance in C++. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120931 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-04Although we currently have explicit lvalue-to-rvalue conversions, they'reJohn McCall
not actually frequently used, because ImpCastExprToType only creates a node if the types differ. So explicitly create an ICE in the lvalue-to-rvalue conversion code in DefaultFunctionArrayLvalueConversion() as well as several other new places, and consistently deal with the consequences throughout the compiler. In addition, introduce a new cast kind for loading an ObjCProperty l-value, and make sure we emit those nodes whenever an ObjCProperty l-value appears that's not on the LHS of an assignment operator. This breaks a couple of rewriter tests, which I've x-failed until future development occurs on the rewriter. Ted Kremenek kindly contributed the analyzer workarounds in this patch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120890 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-04Kill the KVC l-value kind and calculate the base expression when emittingJohn McCall
the l-value. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120884 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02Reflow to a style doug prefers, increasing indentation :-)Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120746 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02fix PR8726 by teaching the aggregate init optimization code to handle Chris Lattner
structs with references in them correctly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120722 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02Improve codegen for initializer lists to use memset more aggressivelyChris Lattner
when an initializer is variable (I handled the constant case in a previous patch). This has three pieces: 1. Enhance AggValueSlot to have a 'isZeroed' bit to tell CGExprAgg that the memory being stored into has previously been memset to zero. 2. Teach CGExprAgg to not emit stores of zero to isZeroed memory. 3. Teach CodeGenFunction::EmitAggExpr to scan initializers to determine whether they are profitable to emit a memset + inividual stores vs stores for everything. The heuristic used is that a global has to be more than 16 bytes and has to be 3/4 zero to be candidate for this xform. The two testcases are illustrative of the scenarios this catches. We now codegen test9 into: call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 400, i32 4, i1 false) %.array = getelementptr inbounds [100 x i32]* %Arr, i32 0, i32 0 %tmp = load i32* %X.addr, align 4 store i32 %tmp, i32* %.array and test10 into: call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 392, i32 8, i1 false) %tmp = getelementptr inbounds %struct.b* %S, i32 0, i32 0 %tmp1 = getelementptr inbounds %struct.a* %tmp, i32 0, i32 0 %tmp2 = load i32* %X.addr, align 4 store i32 %tmp2, i32* %tmp1, align 4 %tmp5 = getelementptr inbounds %struct.b* %S, i32 0, i32 3 %tmp10 = getelementptr inbounds %struct.a* %tmp5, i32 0, i32 4 %tmp11 = load i32* %X.addr, align 4 store i32 %tmp11, i32* %tmp10, align 4 Previously we produced 99 stores of zero for test9 and also tons for test10. This xforms should substantially speed up -O0 builds when it kicks in as well as reducing code size and optimizer heartburn on insane cases. This resolves PR279. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120692 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02Simplify the ASTs by consolidating ObjCImplicitGetterSetterExpr and ↵John McCall
ObjCPropertyRefExpr into the latter. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120643 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-01Restore the lvalue-to-rvalue conversion patch with a minimal fix.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120555 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30L-value to r-value conversion is not ready for prime-time.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120433 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30Introduce an r-value to l-value cast kind. I'm not promising anythingJohn McCall
about the reliability of this yet. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120422 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-17Reset the lifetime-managed flag between emission of the agg conditionalJohn McCall
branches. Fixes PR8623. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119408 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-16Kill CK_Unknown and flesh out the documentation for the existing CastKinds.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119331 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-22After discussion with Doug and John, I am revertingFariborz Jahanian
the patch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117159 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-22Patch fixes miscompile with non-trivial copy constructors and Fariborz Jahanian
statement expressions, //rdar: //8540501 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117146 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-08Revert the hack Chris Lattner added in r97981 to work aroundDouglas Gregor
brokenness in the designated-initializer ASTs. The ASTs were fixed by Alp Toker's patch (r116098) for PR6955. Fixes PR6537. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116101 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-16Initialize AggValueSlot's flags along all paths, plus minor beautification.John McCall
Prospective fix for broken commit in r114045. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114060 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-16Patch to move RequiresGCollection bit toFariborz Jahanian
AggValueSlot slot. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114045 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-15one piece of code is responsible for the lifetime of every aggregateJohn McCall
slot. The easiest way to do that was to bundle up the information we care about for aggregate slots into a new structure which demands that its creators at least consider the question. I could probably be convinced that the ObjC 'needs GC' bit should be rolled into this structure. Implement generalized copy elision. The main obstacle here is that IR-generation must be much more careful about making sure that exactly git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113962 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-06move the hackaround for PR6537 to catch unions as well,Chris Lattner
fixing the ICE in PR7151 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113130 91177308-0d34-0410-b5e6-96231b3b80d8
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