to make sure ThumbRegisterInfo.cpp are compiled and linked in.
Patch by Xerxes.

llvm-svn: 74421

After much back and forth, I decided to deviate from ARM design and split LDR into 4 instructions (r + imm12, r + imm8, r + r << imm12, constantpool). The advantage of this is 1) it follows the latest ARM technical manual, and 2) makes it easier to reduce the width of the instruction later. The down side is this creates more inconsistency between the two sub-targets. We should split ARM LDR instruction in a similar fashion later. I've added a README entry for this.

llvm-svn: 74420

llvm-svn: 74385

llvm-svn: 74384

llvm-svn: 74382

llvm-svn: 74368

llvm-svn: 74357

When possible, use "mvn ra, rb" instead of "eor ra, rb, -1" because mvn has a narrow version and eor(i) does not.

llvm-svn: 74355

Step 1: ARMInstructionInfo => {ARM,Thumb}InstructionInfo

llvm-svn: 74329

llvm-svn: 74322

llvm-svn: 74321

llvm-svn: 74293

Currently there is a pattern for the thumb-2 MOV 16-bit immediate instruction. That instruction cannot write the flags so it should use T2I instead of T2sI.
Also, added a pattern for the thumb-2 MOV of shifted immediate since that can encode immediates not encodable by the 16-bit immediate.

llvm-svn: 74288

llvm-svn: 74277

llvm-svn: 74255

llvm-svn: 74241

llvm-svn: 74239

llvm-svn: 74237

llvm-svn: 74236

llvm-svn: 74228

llvm-svn: 74223

llvm-svn: 74219

llvm-svn: 74212

llvm-svn: 74200

llvm-svn: 74185

llvm-svn: 74176

identify Thumb2.

llvm-svn: 74164

llvm-svn: 74161

Change thumb2 instruction definitions so if-converter so add predicate operands and / or flip the 's' bit to set the condition flag.

llvm-svn: 74158

llvm-svn: 74156

llvm-svn: 74152

No need to code gen MDNodes

llvm-svn: 74150

llvm-svn: 74141

llvm-svn: 74138

llvm-svn: 74097

a bunch of code from all the targets, and eliminates nondeterministic
ordering of directives being emitted in the output.

llvm-svn: 74096

llvm-svn: 74046

llvm-svn: 74042

createSCEV. Also, recognize UndefValue in createSCEV.

Change getIntegerSCEV's comment to avoid mentioning FP types,
and re-implement it in terms of getConstant instead of getUnknown.

llvm-svn: 74041

C bindings.  Change all the backend "Initialize" functions to have C linkage.
Change the "llvm/Config/Targets.def" header to use C-style comments to avoid
compile warnings.

llvm-svn: 74026