Jim Grosbach 6ccfc507dc Many Thumb2 instructions can reference the full ARM register set (i.e., ... have 4 bits per register in the operand encoding), but have undefined behavior when the operand value is 13 or 15 (SP and PC, respectively). The trivial coalescer in linear scan sometimes will merge a copy from SP into a subsequent instruction which uses the copy, and if that instruction cannot legally reference SP, we get bad code such as: mls r0,r9,r0,sp instead of: mov r2, sp mls r0, r9, r0, r2 This patch adds a new register class for use by Thumb2 that excludes the problematic registers (SP and PC) and is used instead of GPR for those operands which cannot legally reference PC or SP. The trivial coalescer explicitly requires that the register class of the destination for the COPY instruction contain the source register for the COPY to be considered for coalescing. This prevents errant instructions like that above. PR7499 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109842 91177308-0d34-0410-b5e6-96231b3b80d8		2010-07-30 02:41:01 +00:00
..
2009-07-17-CrossRegClassCopy.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-07-21-ISelBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-07-23-CPIslandBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-07-30-PEICrash.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-01-WrongLDRBOpc.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-02-CoalescerBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-04-CoalescerAssert.ll	Remove the arm_aapcscc marker from the tests. It is the default	2010-06-15 19:04:29 +00:00
2009-08-04-CoalescerBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-04-ScavengerAssert.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-04-SubregLoweringBug2.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-04-SubregLoweringBug3.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-04-SubregLoweringBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-06-SpDecBug.ll	Remove the arm_aapcscc marker from the tests. It is the default	2010-06-15 19:04:29 +00:00
2009-08-07-CoalescerBug.ll
2009-08-07-NeonFPBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-08-08-ScavengerAssert.ll	Remove the arm_aapcscc marker from the tests. It is the default	2010-06-15 19:04:29 +00:00
2009-08-10-ISelBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-09-28-ITBlockBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-10-15-ITBlockBranch.ll	Fix test to appease the buildbots.	2010-07-14 16:43:47 +00:00
2009-11-01-CopyReg2RegBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-11-11-ScavengerAssert.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-11-13-STRDBug.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2009-12-01-LoopIVUsers.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-01-06-TailDuplicateLabels.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-01-19-RemovePredicates.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-02-11-phi-cycle.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-02-24-BigStack.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-03-08-addi12-ccout.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-03-15-AsmCCClobber.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-04-15-DynAllocBug.ll	Many Thumb2 instructions can reference the full ARM register set (i.e.,	2010-07-30 02:41:01 +00:00
2010-04-26-CopyRegCrash.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-05-24-rsbs.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-06-14-NEONCoalescer.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
2010-06-19-ITBlockCrash.ll	Fix a crash caused by dereference of MBB.end(). rdar://8110842	2010-06-20 00:54:38 +00:00
2010-06-21-TailMergeBug.ll	Tail merging pass shall not break up IT blocks. rdar://8115404	2010-06-22 01:18:16 +00:00
bfi.ll	Add combiner patterns to more effectively utilize the BFI (bitfield insert)	2010-07-17 03:30:54 +00:00
bfx.ll	Update ARM DAGtoDAG for matching UBFX instruction for unsigned bitfield	2010-04-22 23:24:18 +00:00
carry.ll
crash.ll	TwoAddressInstructionPass::CoalesceExtSubRegs can insert INSERT_SUBREG	2010-06-18 22:29:44 +00:00
cross-rc-coalescing-1.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
cross-rc-coalescing-2.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
dg.exp
div.ll	fix copy/paste oops.	2010-05-05 21:07:46 +00:00
frameless2.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
frameless.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
ifcvt-neon.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
large-stack.ll	Stop using the old pre-UAL syntax for LDM/STM instruction suffixes.	2010-03-16 16:19:07 +00:00
ldr-str-imm12.ll	Eliminate the first have of the optimization which eliminates BRCOND	2010-06-24 15:04:11 +00:00
load-global.ll	Start function numbering at 0.	2010-04-17 16:29:15 +00:00
lsr-deficiency.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
machine-licm-vdup.ll	Implement vector constants which are splat of	2010-07-29 20:10:08 +00:00
machine-licm.ll	Print "dregpair" NEON operands with a space between them, for readability and	2010-07-09 00:47:20 +00:00
mul_const.ll
pic-load.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
thumb2-adc.ll
thumb2-add2.ll
thumb2-add3.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-add4.ll
thumb2-add5.ll
thumb2-add6.ll
thumb2-add.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
thumb2-and2.ll	update tests for smarter BIC usage	2010-07-20 16:16:48 +00:00
thumb2-and.ll
thumb2-asr2.ll
thumb2-asr.ll
thumb2-badreg-operands.ll	Many Thumb2 instructions can reference the full ARM register set (i.e.,	2010-07-30 02:41:01 +00:00
thumb2-bcc.ll	Fix tests.	2009-11-01 18:13:29 +00:00
thumb2-bfc.ll	Fix Thumb2 failures by converting them to FileCheck.	2009-10-27 06:31:02 +00:00
thumb2-bic.ll
thumb2-branch.ll	Fix a bug which prevented tail merging of return instructions in	2010-05-03 14:35:47 +00:00
thumb2-call-tc.ll	Changes to ARM tail calls, mostly cosmetic.	2010-07-08 01:18:23 +00:00
thumb2-call.ll	Remove tail call to preserve this test. A tail	2010-06-03 21:57:48 +00:00
thumb2-cbnz.ll	Allow ARM if-converter to be run after post allocation scheduling.	2010-06-18 23:09:54 +00:00
thumb2-clz.ll	Fix Thumb2 failures by converting them to FileCheck.	2009-10-27 06:31:02 +00:00
thumb2-cmn2.ll	Fix Thumb2 failures by converting them to FileCheck.	2009-10-27 06:31:02 +00:00
thumb2-cmn.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-cmp2.ll
thumb2-cmp.ll
thumb2-eor2.ll	Fix Thumb2 failures by converting them to FileCheck.	2009-10-27 06:31:02 +00:00
thumb2-eor.ll	PR7458: Try commuting Thumb2 instruction operands to put them into 2-address	2010-06-24 16:50:20 +00:00
thumb2-ifcvt1-tc.ll	Enable tail calls on ARM by default, with some	2010-06-18 19:00:18 +00:00
thumb2-ifcvt1.ll	Remove tail call. A tail call version will follow.	2010-06-04 00:03:37 +00:00
thumb2-ifcvt2.ll	Allow ARM if-converter to be run after post allocation scheduling.	2010-06-18 23:09:54 +00:00
thumb2-ifcvt3.ll	Reapply my if-conversion cleanup from svn r106939 with fixes.	2010-06-29 00:55:23 +00:00
thumb2-jtb.ll	Enable arm jumpt table adjustment.	2009-11-17 21:24:11 +00:00
thumb2-ldm.ll	Make this test not use tail calls. A tail call	2010-06-03 21:53:01 +00:00
thumb2-ldr_ext.ll
thumb2-ldr_post.ll
thumb2-ldr_pre.ll
thumb2-ldr.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-ldrb.ll
thumb2-ldrd.ll	Enable pre-regalloc load / store multiple pass for Thumb2.	2009-09-27 09:46:04 +00:00
thumb2-ldrh.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-lsl2.ll
thumb2-lsl.ll
thumb2-lsr2.ll
thumb2-lsr3.ll
thumb2-lsr.ll
thumb2-mla.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-mls.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-mov.ll	Consolidate test files	2009-10-31 22:20:56 +00:00
thumb2-mul.ll
thumb2-mulhi.ll
thumb2-mvn2.ll
thumb2-mvn.ll
thumb2-neg.ll
thumb2-orn2.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-orn.ll	Miss two, PR5307.	2009-11-22 15:35:28 +00:00
thumb2-orr2.ll	Miss two, PR5307.	2009-11-22 15:35:28 +00:00
thumb2-orr.ll
thumb2-pack.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-rev16.ll
thumb2-rev.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-ror2.ll
thumb2-ror.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-rsb2.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-rsb.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-sbc.ll	Improve 64-subtraction of immediates when parts of the immediate can fit	2010-07-14 17:45:16 +00:00
thumb2-select_xform.ll	Move ARM if-conversion before post-ra scheduling.	2010-06-18 23:32:07 +00:00
thumb2-select.ll
thumb2-shifter.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-smla.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-smul.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-spill-q.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
thumb2-str_post.ll	Fix Thumb2 failures by converting them to FileCheck.	2009-10-27 06:31:02 +00:00
thumb2-str_pre.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-str.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-strb.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-strh.ll	Added sub-formats to the NeonI/NeonXI instructions to further refine the NEONFrm	2010-03-17 17:52:21 +00:00
thumb2-sub2.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-sub3.ll	Improve 64-subtraction of immediates when parts of the immediate can fit	2010-07-14 17:45:16 +00:00
thumb2-sub4.ll
thumb2-sub5.ll
thumb2-sub.ll
thumb2-sxt_rot.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-tbb.ll
thumb2-tbh.ll	Remove arm_apcscc from the test files. It is the default and doing this	2010-06-17 15:18:27 +00:00
thumb2-teq2.ll	Convert to FileCheck	2009-11-16 20:04:15 +00:00
thumb2-teq.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-tst2.ll
thumb2-tst.ll	Convert Thumb2 tests to FileCheck for PR5307.	2009-11-22 15:18:27 +00:00
thumb2-uxt_rot.ll	Cleanup of ARMv7M support. Move hardware divide and Thumb2 extract/pack	2010-05-05 23:44:43 +00:00
thumb2-uxtb.ll	update tests for smarter BIC usage	2010-07-20 16:16:48 +00:00
tls1.ll
tls2.ll