More anonymous struct/union redesign. This one deals with anonymous field used in a constructor initializer list:

struct X {
  X() : au_i1(123) {}
  union {
    int au_i1;
    float au_f1;
  };
};

clang will now deal with au_i1 explicitly as an IndirectFieldDecl.

llvm-svn: 120900

be required, and then fix up some missing loads on overloaded-operator
paths which that exposed.

llvm-svn: 120896

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.

llvm-svn: 120890

Also, move the l-value emission code into CGObjC.cpp and teach it, for
completeness, to store away self for a super send.

Also, inline the super cases for property gets and sets and make them
use the correct result type for implicit getter/setter calls.

llvm-svn: 120887

the l-value.

llvm-svn: 120884

llvm-svn: 120881

llvm-svn: 120879

llvm-svn: 120878

llvm-svn: 120812

to distinguish vsri/vsli.

llvm-svn: 120806

llvm-svn: 120746

structs with references in them correctly.

llvm-svn: 120722

objects imported into blocks. //rdar://8594790.
Will have a test case coming (as well as one
sent to llvm test suite).

llvm-svn: 120713

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.

llvm-svn: 120692

llvm-svn: 120688

rdar://8560647

llvm-svn: 120650

a global is larger than 32 bytes and has fewer than 6 non-zero values in the
initializer.  Previously we'd turn something like this:

char test8(int X) {
  char str[10000] = "abc";

into a 10K global variable which we then memcpy'd from.  Now we generate:

  %str = alloca [10000 x i8], align 16
  %tmp = getelementptr inbounds [10000 x i8]* %str, i64 0, i64 0
  call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 10000, i32 16, i1 false)
  store i8 97, i8* %tmp, align 16
  %0 = getelementptr [10000 x i8]* %str, i64 0, i64 1
  store i8 98, i8* %0, align 1
  %1 = getelementptr [10000 x i8]* %str, i64 0, i64 2
  store i8 99, i8* %1, align 2

Which is much smaller in space and also likely faster.

This is part of PR279

llvm-svn: 120645

into the latter.

llvm-svn: 120643

llvm-svn: 120555

http://llvm.org/bugs/show_bug.cgi?id=279#c3 better.

No functionality change yet.

llvm-svn: 120530

using ConstantInt::get.

llvm-svn: 120527

refer to opaque types, they must be held via PATypeHolders.  I'm
not sure why this hasn't blown up before.

llvm-svn: 120491

llvm-svn: 120489

literal declaration caused crash in CodeGen.
This patch fixes it. pr8707

llvm-svn: 120486

llvm-svn: 120433

about the reliability of this yet.

llvm-svn: 120422

Harden CGDebugInfo::CreateType() a bit for cases where we couldn't generate type info for its component types

llvm-svn: 120401

llvm-svn: 120297

llvm-svn: 120268

llvm-svn: 120257

llvm-svn: 120252

llvm-svn: 120251

llvm-svn: 120250

llvm-svn: 120249

llvm-svn: 120153

llvm-svn: 120140

llvm-svn: 120133

llvm-svn: 120132

llvm-svn: 120129

llvm-svn: 120118