for non-fragile abi on darwin.

llvm-svn: 101168

Expand postra machine licm's capability a little more. If an instruction's register operands are all loop invariants, then it's safe to hoist it.

llvm-svn: 101167

Sometimes it is desirable to sink instructions along a critical edge:

x = ...
if (a && b) ...
else use(x);

The 'a && b' condition creates a critical edge to the else block, but we still
want to sink the computation of x into the block. The else block is dominated by
the parent block, so we are not pushing instructions into new code paths.

llvm-svn: 101165

on objc classes for Darwin. Radar 7839485.

llvm-svn: 101164

llvm-svn: 101163

Re-apply 101075 and fix it properly. Just reuse the debug info of the branch instruction being optimized. There is no need to --I which can deref off start of the BB.

llvm-svn: 101162

llvm-svn: 101161

patch by Marius Wachtler!

llvm-svn: 101160

in a nightly tester.

llvm-svn: 101158

property (atomic/nonatomic) is of aggregate type with
gc'able member objects) (NeXT runtime).

llvm-svn: 101156

elements with explicit zero values instead of with tail padding.
On an example like this:

struct foo { int a; int b; };

struct foo fooarray[] = {
    {1, 2},
    {4},
};

We now lay this out as:

@fooarray = global [2 x %struct.foo] [%struct.foo { i32 1, i32 2 }, %struct.foo { i32 4, i32 0 }]

instead of as:

@fooarray = global %0 <{ %struct.foo { i32 1, i32 2 }, %1 { i32 4, [4 x i8] zeroinitializer } }>

Preserving both the struct type of the second element, but also the array type of the entire thing.

llvm-svn: 101155

Teach postra machine licm to hoist more obvious invariants, e.g. instructions with no source operands.

llvm-svn: 101154

llvm-svn: 101153

llvm-svn: 101152

llvm-svn: 101151

this caused us to codegen dead globals like this:

struct foo { int a; int b; };

static struct foo fooarray[] = {
  {1, 2},
  {4},
};

llvm-svn: 101150

Without it, there is no reason for a compiler that supports it to
emit the dead static globals that the rewriter labels attribute(used).

llvm-svn: 101149

llvm-svn: 101148

MachineBasicBlock::livein_iterator a const_iterator, because
clients shouldn't ever be using the iterator interface to
mutate the livein set.

llvm-svn: 101147

the rest of CodeGen.

llvm-svn: 101146

llvm-svn: 101145

llvm-svn: 101144

llvm-svn: 101143

that one operand is always greater than another.

llvm-svn: 101142

llvm-svn: 101141

llvm-svn: 101139

llvm-svn: 101138

for reference binding. The code attempted to handle both the
computation of the ICS and the actual conversion, but the latter is an
anachronism: we now use InitializationSequence for that. 

Sema::CheckReferenceInit is now a static function TryReferenceInit
that's only use within overload resolution, and has been simplified
slightly. It still needs to be updated per C++ [over.ics.ref], by
eliminating more of the lvalue/rvalue checks.

llvm-svn: 101136

return a NULL expression; return either an error or a proper
expression. Fixes PR6078.

llvm-svn: 101133

direct reference binding when the source and target types are not
reference-related. Fixes PR6066.

llvm-svn: 101132

llvm-svn: 101131

We have some code in llvm and clang where a BumpPtrAllocator is declared in a
class but never used in the common case. Stop wasting memory there.

llvm-svn: 101130

llvm-svn: 101129

llvm-svn: 101128

llvm-svn: 101127

llvm-svn: 101125

members of non-templated classes.

llvm-svn: 101122

llvm-svn: 101120

PR6207.

llvm-svn: 101119

llvm-svn: 101118