Preserve the register coallescer, and update live intervals more correctly by triggering a renumbering after phi elimination.

llvm-svn: 51780

Since LCSSA switched over to DenseMap, we have to be more careful to avoid iterator invalidation.  Fixes PR2385.

llvm-svn: 51777

llvm-svn: 51775

once (ie, at two different places in the source, not two times on the
commandline).

llvm-svn: 51771

llvm-svn: 51770

insertvalue / extractvalue instructions.

llvm-svn: 51766

llvm-svn: 51761

llvm-svn: 51760

llvm-svn: 51759

llvm-svn: 51758

llvm-svn: 51757

llvm-svn: 51756

llvm-svn: 51755

It can be handy to have all information about options gathered in a single place
to provide an overview of all supported options. This patch allows the following:

def Options : OptionList<[
(switch_option "E", (help "Help string")),
(alias_option "quiet", "q")
...
]>;

Tool-specific option properties (like 'append_cmd') have (obviously) no meaning in
this context, so the only properties that are allowed are 'help' and 'required'.

See usage example in examples/Clang.td.

llvm-svn: 51754

llvm-svn: 51753

llvm-svn: 51752

The following is now allowed:

    (case (not_empty "o"), do_something, ...)

This didn't work previously because "-o" is built-in.

llvm-svn: 51751

llvm-svn: 51750

llvm-svn: 51749

The following is now legal:

    (case (in_language "c"),
          (case (switch_on "E"), "gcc -x c -E $INFILE", (default), "gcc -x c $INFILE"),
          (default),
          "gcc $INFILE $OUTFILE")

llvm-svn: 51748

llvm-svn: 51747

There are now no situations when 'default' is required.

llvm-svn: 51746

llvm-svn: 51745

llvm-svn: 51744

llvm-svn: 51743

llvm-svn: 51742

llvm-svn: 51741

llvm-svn: 51740

llvm-svn: 51739

llvm-svn: 51738

llvm-svn: 51737

llvm-svn: 51736

llvm-svn: 51735

llvm-svn: 51734

For instance, the following command:

    llvmc2 -E hello.c

now generates a file with the correct suffix (hello.i).

llvm-svn: 51733

Used like this: (cmd_line "$CALL(MyHook) --option -o $ENV(VARIABLE) $CALL(AnotherHook)")
Also works with case expressions.

Hook declarations are auto-generated, the definitions should be provided by the user
(just drop a .cpp file in the tools/llvmc2 directory).

Hooks should live in the "hooks" namespace and have type std::string hooks::Hook(void).

llvm-svn: 51732

llvm-svn: 51731

llvm-svn: 51730

llvm-svn: 51729

llvm-svn: 51728