jump table entries.

llvm-svn: 94505

instead of magic variables.

llvm-svn: 94500

1. MachineJumpTableInfo is now created lazily for a function the first time
   it actually makes a jump table instead of for every function.
2. The encoding of jump table entries is now described by the
   MachineJumpTableInfo::JTEntryKind enum.  This enum is determined by the
   TLI::getJumpTableEncoding() hook, instead of by lots of code scattered
   throughout the compiler that "knows" that jump table entries are always
   32-bits in pic mode (for example).
3. The size and alignment of jump table entries is now calculated based on
   their kind, instead of at machinefunction creation time.

Future work includes using the EntryKind in more places in the compiler,
eliminating other logic that "knows" the layout of jump tables in various
situations.

llvm-svn: 94470

llvm-svn: 94464

llvm-svn: 94452

llvm-svn: 94450

llvm-svn: 94449

make it clear what it is, instead of how it is used.

llvm-svn: 94448

and MCize the non-pic case.  Now printPICJumpTableEntry really
is just about printing PIC entries.

llvm-svn: 94446

llvm-svn: 94445

rename it to avoid shadowing.

llvm-svn: 94440

normal form of .file would fail if the filename had a weird character
in it.

llvm-svn: 94437

llvm-svn: 94436

llvm-svn: 94417

mcstreamer.

llvm-svn: 94416

llvm-svn: 94299

a .section.  Switch to it with SwitchSection.

However, I think that this directive should be safe on any ELF target.
If so, we should hoist it up out of the X86 and SystemZ targets.

llvm-svn: 94298

llvm-svn: 94295

into a new MCDirectives.h file.

llvm-svn: 94294

to MCExpr then emit them through MCStreamer with EmitValue.  I think all
global variable initializers are now going through mcstreamer.

llvm-svn: 94293

llvm-svn: 94290

and some .weak directives.

llvm-svn: 94284

llvm-svn: 94282

be careful to add a \0 at the end though, because EmitString didn't
do this.

llvm-svn: 94277

be completely eliminated, but today is not that day.

llvm-svn: 94253

cleanup and eliminate a bunch more uses of "EOL".

llvm-svn: 94250

handle the comment better, MCize the non-.sleb case.

llvm-svn: 94244

pretty printing encoding comments and eliminates redundancy on
the client side.  We now get pretty dwarf like this again:

        .byte   255                                         ## @LPStart Encoding = omit
        .byte   0                                           ## @TType Encoding = absptr
        .byte   0x28                                        ## @TType base offset
        .byte   3                                           ## Call site Encoding = udata4
        .byte   0x1a                                        ## Call site table size
...

llvm-svn: 94239

llvm-svn: 94230

llvm-svn: 94228

llvm-svn: 94227

output.  An example:

        .align  4, 0x90
LBB1_5:                                                     ## %while.cond3
                                                            ##   Parent Loop BB1_1 Depth=1
                                                            ## =>  This Loop Header: Depth=2
                                                            ##       Child Loop BB1_8 Depth 3
                                                            ##       Child Loop BB1_6 Depth 3

llvm-svn: 94225

For loop headers, print Inner loop along with the other stuff so it doesn't take
an extra line.  We now get stuff like this:

LBB1_4:                                                     ## %land.end
                                                            ##   in Loop: Header=BB1_1 Depth=1
        notb    %al
        testb   $1, %al
        jne     LBB1_8

and:

LBB1_6:                                                     ## %while.cond7
                                                            ## Inner Loop Header: Depth=3
                                                            ##     Inside Loop BB1_5 Depth 2
                                                            ##   Inside Loop BB1_1 Depth 1

which still isn't great for loop headers, but is much less verbose.

llvm-svn: 94221

comment emission stuff.  I'm going to rewrite this though because the
current output doesn't make sense.

llvm-svn: 94215

AddComment and GetCommentOS.  Add a blank line between globals
(even in non-verbose mode) to make the assembly more readable.

llvm-svn: 94202

that doesn't want to use twines.

llvm-svn: 94199

llvm-svn: 94190

Switch over the asm-verbose comment for double values to use it.  We now get:

_x:
	.long	343597384                                   ## double 1.231200e+02
	.long	1079953326

For example, note that the comment is on the same line as the .long.  Woo.

llvm-svn: 94166

llvm-svn: 94165

llvm-svn: 94010