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clang-p2996/llvm/test/CodeGen/Thumb2/block-placement.mir
Malhar Jajoo 9ba5238c28 [ARM] Simplification to ARMBlockPlacement Pass. 
It simplifies the logic by moving the predecessor  (preHeader or it's predecessor) above the target (or loopExit),
instead of moving the target to after the predecessor.

Since the loopExit is no longer being moved, directions of any branches within/to it are unaffected.

While the predecessor is being moved, the backwards movement simplifies some considerations,
and the only consideration now required is that a forward WLS to the predecessor should not become backwards.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D100094
2021-05-06 01:20:18 +01:00

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv8.1m.main-none-eabi -mattr=+mve -run-pass=arm-block-placement %s -o - | FileCheck %s
--- |
; Checks that Predecessor gets moved (to before the LoopExit) if it contains a backward WLS.
define void @backwards_branch(i32 %N, i32* nocapture %a, i32* nocapture readonly %b) {
entry:
unreachable
}
; Checks that Predecessor (containing a backwards WLS) does not get moved to before the loopExit if it is the entry block.
define void @backwards_branch_entry_block(i32 %N, i32* nocapture %a, i32* nocapture readonly %b) {
entry:
unreachable
}
; Checks that Predecessor (to which a forward WLS exists) is not moved if moving it would cause the WLS to become backwards branching.
define void @backwards_branch_backwards_wls(i32 %N, i32 %M, i32* nocapture %a, i32* nocapture %b, i32* nocapture %c) {
entry:
unreachable
}
; Checks that a MachineFunction is unaffected if it doesn't contain any WLS (pseudo) instruction.
define void @no_predecessor(i32 %N, i32 %M, i32* nocapture %a, i32* nocapture %b, i32* nocapture %c) {
entry:
unreachable
}
; Within a nested (Both the WLS and loopExit are at depth=3 here) loop, checks that Predecessor
; gets moved (in backward direction) if there exists a backdwards WLS from it to the LoopExit.
define void @nested_loops(i32 %n, i32 %m, i32 %l, i8* noalias %X, i8* noalias %Y) {
entry:
unreachable
}
; Checks that Predecessor (to which a forward WLS exists) is moved if moving it would NOT cause the WLS
; to become backwards branching.
define void @backwards_branch_forwards_wls(i32 %N, i32 %M, i32* nocapture %a, i32* nocapture %b, i32* nocapture %c) {
entry:
unreachable
}
; Checks that multiple predecessor case is handled appropriately
define void @multiple_predecessors(i32 %d, i32 %e, i32 %f) {
entry:
unreachable
}
declare dso_local i32 @g(...)
declare dso_local i32 @h(...)
...
---
name: backwards_branch
body: |
; CHECK-LABEL: name: backwards_branch
; CHECK: bb.0:
; CHECK: successors: %bb.1(0x80000000)
; CHECK: tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 11, 8, implicit-def $itstate
; CHECK: frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
; CHECK: bb.1:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.2, implicit-def dead $cpsr
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
; CHECK: bb.2:
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
; CHECK: bb.3:
; CHECK: successors: %bb.3(0x7c000000), %bb.2(0x04000000)
; CHECK: renamable $r0 = tLDRi renamable $r2, 0, 14 /* CC::al */, $noreg
; CHECK: tSTRi killed renamable $r0, renamable $r1, 0, 14 /* CC::al */, $noreg
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.2, 14 /* CC::al */, $noreg
bb.0:
successors: %bb.2(0x80000000)
liveins: $r0, $r1, $r2, $lr
tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 11, 8, implicit-def $itstate
frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
bb.1:
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
bb.2:
successors: %bb.3(0x80000000)
liveins: $r0, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.1, implicit-def dead $cpsr
bb.3:
successors: %bb.3(0x7c000000), %bb.1(0x04000000)
liveins: $lr, $r1, $r2
renamable $r0 = tLDRi renamable $r2, 0, 14 /* CC::al */, $noreg
tSTRi killed renamable $r0, renamable $r1, 0, 14 /* CC::al */, $noreg
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.3, implicit-def dead $cpsr
t2B %bb.1, 14 /* CC::al */, $noreg
...
---
name: backwards_branch_entry_block
body: |
; CHECK-LABEL: name: backwards_branch_entry_block
; CHECK: bb.0:
; CHECK: successors: %bb.2(0x80000000)
; CHECK: tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 11, 8, implicit-def $itstate
; CHECK: frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
; CHECK: bb.1:
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
; CHECK: bb.2:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.0, implicit-def dead $cpsr
; CHECK: bb.3:
; CHECK: successors: %bb.3(0x7c000000), %bb.1(0x04000000)
; CHECK: renamable $r0 = tLDRi renamable $r2, 0, 14 /* CC::al */, $noreg
; CHECK: tSTRi killed renamable $r0, renamable $r1, 0, 14 /* CC::al */, $noreg
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.1, 14 /* CC::al */, $noreg
bb.0:
successors: %bb.2(0x80000000)
liveins: $r0, $r1, $r2, $lr
tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 11, 8, implicit-def $itstate
frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
bb.1:
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
bb.2:
successors: %bb.3(0x80000000)
liveins: $r0, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.0, implicit-def dead $cpsr
bb.3:
successors: %bb.3(0x7c000000), %bb.1(0x04000000)
liveins: $lr, $r1, $r2
renamable $r0 = tLDRi renamable $r2, 0, 14 /* CC::al */, $noreg
tSTRi killed renamable $r0, renamable $r1, 0, 14 /* CC::al */, $noreg
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.3, implicit-def dead $cpsr
t2B %bb.1, 14 /* CC::al */, $noreg
...
---
name: backwards_branch_backwards_wls
body: |
; CHECK-LABEL: name: backwards_branch_backwards_wls
; CHECK: bb.0:
; CHECK: successors: %bb.2(0x80000000)
; CHECK: tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 11, 8, implicit-def $itstate
; CHECK: frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
; CHECK: bb.1:
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
; CHECK: bb.2:
; CHECK: successors: %bb.3(0x40000000), %bb.5(0x40000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.5, 14 /* CC::al */, $noreg
; CHECK: bb.3:
; CHECK: successors: %bb.1(0x7c000000), %bb.4(0x04000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.1, implicit-def dead $cpsr
; CHECK: t2B %bb.4, 14 /* CC::al */, $noreg
; CHECK: bb.4:
; CHECK: successors: %bb.1(0x40000000), %bb.4(0x40000000)
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.4, implicit-def dead $cpsr
; CHECK: t2B %bb.1, 14 /* CC::al */, $noreg
; CHECK: bb.5:
; CHECK: successors: %bb.5(0x40000000), %bb.3(0x40000000)
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.5, implicit-def dead $cpsr
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
bb.0:
successors: %bb.2(0x80000000)
liveins: $r0, $r1, $r2, $lr
tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 11, 8, implicit-def $itstate
frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
bb.1:
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
bb.2:
successors: %bb.3(0x80000000), %bb.5(0x80000000)
liveins: $r0, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.3, implicit-def dead $cpsr
t2B %bb.5, 14 /* CC::al */, $noreg
bb.3:
successors: %bb.1(0x7c000000), %bb.4(0x04000000)
liveins: $lr, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.1, implicit-def dead $cpsr
t2B %bb.4, 14 /* CC::al */, $noreg
bb.4:
successors: %bb.1, %bb.4
liveins: $lr, $r1, $r2
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.4, implicit-def dead $cpsr
t2B %bb.1, 14 /* CC::al */, $noreg
bb.5:
successors: %bb.5, %bb.3
liveins: $lr, $r1, $r2
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.5, implicit-def dead $cpsr
t2B %bb.3, 14 /* CC::al */, $noreg
...
---
name: no_predecessor
body: |
; CHECK-LABEL: name: no_predecessor
; CHECK: bb.0:
; CHECK: successors: %bb.2(0x30000000), %bb.1(0x50000000)
; CHECK: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, killed $r5, $r7, killed $lr, implicit-def $sp, implicit $sp
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 16
; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK: frame-setup CFI_INSTRUCTION offset $r7, -8
; CHECK: frame-setup CFI_INSTRUCTION offset $r5, -12
; CHECK: frame-setup CFI_INSTRUCTION offset $r4, -16
; CHECK: $r7 = frame-setup tADDrSPi $sp, 2, 14 /* CC::al */, $noreg
; CHECK: frame-setup CFI_INSTRUCTION def_cfa $r7, 8
; CHECK: $r4 = tMOVr killed $r0, 14 /* CC::al */, $noreg
; CHECK: tBL 14 /* CC::al */, $noreg, @g, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
; CHECK: tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.2, 0 /* CC::eq */, killed $cpsr
; CHECK: bb.1:
; CHECK: successors: %bb.4(0x80000000)
; CHECK: renamable $r0, dead $cpsr = tMOVi8 4, 14 /* CC::al */, $noreg
; CHECK: renamable $r5 = t2LDRSHi12 killed renamable $r0, 0, 14 /* CC::al */, $noreg
; CHECK: t2B %bb.4, 14 /* CC::al */, $noreg
; CHECK: bb.2:
; CHECK: successors: %bb.4(0x80000000)
; CHECK: renamable $r5, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
; CHECK: t2B %bb.4, 14 /* CC::al */, $noreg
; CHECK: bb.3:
; CHECK: successors: %bb.4(0x80000000)
; CHECK: $r0 = tMOVr $r5, 14 /* CC::al */, $noreg
; CHECK: tBL 14 /* CC::al */, $noreg, @h, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0
; CHECK: bb.4:
; CHECK: successors: %bb.5(0x04000000), %bb.3(0x7c000000)
; CHECK: renamable $r0 = tLDRi renamable $r4, 0, 14 /* CC::al */, $noreg
; CHECK: tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
; CHECK: bb.5:
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $r5, def $r7, def $pc
bb.0:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $r0, $r4, $r5, $lr
frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, killed $r5, $r7, killed $lr, implicit-def $sp, implicit $sp
frame-setup CFI_INSTRUCTION def_cfa_offset 16
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r7, -8
frame-setup CFI_INSTRUCTION offset $r5, -12
frame-setup CFI_INSTRUCTION offset $r4, -16
$r7 = frame-setup tADDrSPi $sp, 2, 14 /* CC::al */, $noreg
frame-setup CFI_INSTRUCTION def_cfa $r7, 8
$r4 = tMOVr killed $r0, 14 /* CC::al */, $noreg
tBL 14 /* CC::al */, $noreg, @g, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0
tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2Bcc %bb.1, 0 /* CC::eq */, killed $cpsr
bb.2:
successors: %bb.3(0x80000000)
liveins: $r4
renamable $r0, dead $cpsr = tMOVi8 4, 14 /* CC::al */, $noreg
renamable $r5 = t2LDRSHi12 killed renamable $r0, 0, 14 /* CC::al */, $noreg
t2B %bb.3, 14 /* CC::al */, $noreg
bb.1:
successors: %bb.3(0x80000000)
liveins: $r4
renamable $r5, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
t2B %bb.3, 14 /* CC::al */, $noreg
bb.4:
successors: %bb.3(0x80000000)
liveins: $r4, $r5
$r0 = tMOVr $r5, 14 /* CC::al */, $noreg
tBL 14 /* CC::al */, $noreg, @h, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0
bb.3:
successors: %bb.5(0x04000000), %bb.4(0x7c000000)
liveins: $r4, $r5
renamable $r0 = tLDRi renamable $r4, 0, 14 /* CC::al */, $noreg
tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2Bcc %bb.4, 1 /* CC::ne */, killed $cpsr
bb.5:
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $r5, def $r7, def $pc
...
---
name: nested_loops
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$r0' }
- { reg: '$r1' }
- { reg: '$r2' }
- { reg: '$r3' }
frameInfo:
stackSize: 32
maxAlignment: 4
maxCallFrameSize: 0
fixedStack:
- { id: 0, size: 4, alignment: 8, isImmutable: true }
stack:
- { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr',
callee-saved-restored: false }
- { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r10' }
- { id: 2, type: spill-slot, offset: -12, size: 4, alignment: 4, callee-saved-register: '$r9' }
- { id: 3, type: spill-slot, offset: -16, size: 4, alignment: 4, callee-saved-register: '$r8' }
- { id: 4, type: spill-slot, offset: -20, size: 4, alignment: 4, callee-saved-register: '$r7' }
- { id: 5, type: spill-slot, offset: -24, size: 4, alignment: 4, callee-saved-register: '$r6' }
- { id: 6, type: spill-slot, offset: -28, size: 4, alignment: 4, callee-saved-register: '$r5' }
- { id: 7, type: spill-slot, offset: -32, size: 4, alignment: 4, callee-saved-register: '$r4' }
machineFunctionInfo: {}
body: |
; CHECK-LABEL: name: nested_loops
; CHECK: bb.0:
; CHECK: successors: %bb.1(0x80000000)
; CHECK: liveins: $r0, $r1, $r2, $r3, $r4, $r5, $r6, $r7, $r8, $r9, $r10, $lr
; CHECK: $sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $r5, killed $r6, killed $r7, killed $r8, killed $r9, killed $r10, killed $lr
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 32
; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK: frame-setup CFI_INSTRUCTION offset $r10, -8
; CHECK: frame-setup CFI_INSTRUCTION offset $r9, -12
; CHECK: frame-setup CFI_INSTRUCTION offset $r8, -16
; CHECK: frame-setup CFI_INSTRUCTION offset $r7, -20
; CHECK: frame-setup CFI_INSTRUCTION offset $r6, -24
; CHECK: frame-setup CFI_INSTRUCTION offset $r5, -28
; CHECK: frame-setup CFI_INSTRUCTION offset $r4, -32
; CHECK: tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 11, 8, implicit-def $itstate
; CHECK: $sp = frame-destroy t2LDMIA_RET $sp, 11 /* CC::lt */, killed $cpsr, def $r4, def $r5, def $r6, def $r7, def $r8, def $r9, def $r10, def $pc, implicit killed $itstate
; CHECK: bb.1:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: liveins: $r0, $r1, $r2, $r3
; CHECK: renamable $r12 = t2LDRi12 $sp, 32, 14 /* CC::al */, $noreg :: (load 4 from %fixed-stack.0, align 8)
; CHECK: $r9 = tMOVr killed $r2, 14 /* CC::al */, $noreg
; CHECK: renamable $r8 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
; CHECK: bb.2:
; CHECK: successors: %bb.9(0x04000000), %bb.3(0x7c000000)
; CHECK: liveins: $r0, $r1, $r3, $r8, $r9, $r12
; CHECK: renamable $r8 = nuw nsw t2ADDri killed renamable $r8, 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: renamable $r3, dead $cpsr = tADDi8 killed renamable $r3, 1, 14 /* CC::al */, $noreg
; CHECK: tCMPhir renamable $r8, renamable $r0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: renamable $r12 = t2ADDri killed renamable $r12, 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2Bcc %bb.9, 0 /* CC::eq */, killed $cpsr
; CHECK: bb.3:
; CHECK: successors: %bb.4(0x50000000), %bb.2(0x30000000)
; CHECK: liveins: $r0, $r1, $r3, $r8, $r9, $r12
; CHECK: tCMPi8 renamable $r1, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2Bcc %bb.2, 11 /* CC::lt */, killed $cpsr
; CHECK: bb.4:
; CHECK: successors: %bb.5(0x80000000)
; CHECK: liveins: $r0, $r1, $r3, $r8, $r9, $r12
; CHECK: renamable $r4, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
; CHECK: $r10 = tMOVr $r12, 14 /* CC::al */, $noreg
; CHECK: $r2 = tMOVr $r3, 14 /* CC::al */, $noreg
; CHECK: t2B %bb.5, 14 /* CC::al */, $noreg
; CHECK: bb.5:
; CHECK: successors: %bb.7(0x50000000), %bb.6(0x30000000)
; CHECK: liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
; CHECK: renamable $lr = t2WhileLoopStartLR killed renamable $r9, %bb.6, implicit-def dead $cpsr
; CHECK: t2B %bb.7, 14 /* CC::al */, $noreg
; CHECK: bb.6:
; CHECK: successors: %bb.2(0x04000000), %bb.5(0x7c000000)
; CHECK: liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
; CHECK: renamable $r4, dead $cpsr = nuw nsw tADDi8 killed renamable $r4, 1, 14 /* CC::al */, $noreg
; CHECK: renamable $r2, dead $cpsr = tADDi8 killed renamable $r2, 1, 14 /* CC::al */, $noreg
; CHECK: tCMPr renamable $r4, renamable $r1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: renamable $r10 = t2ADDri killed renamable $r10, 1, 14 /* CC::al */, $noreg, $noreg
; CHECK: t2Bcc %bb.2, 0 /* CC::eq */, killed $cpsr
; CHECK: t2B %bb.5, 14 /* CC::al */, $noreg
; CHECK: bb.7:
; CHECK: successors: %bb.8(0x80000000)
; CHECK: liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
; CHECK: $r5 = tMOVr $r10, 14 /* CC::al */, $noreg
; CHECK: $r6 = tMOVr $r2, 14 /* CC::al */, $noreg
; CHECK: t2B %bb.8, 14 /* CC::al */, $noreg
; CHECK: bb.8:
; CHECK: successors: %bb.8(0x7c000000), %bb.6(0x04000000)
; CHECK: liveins: $lr, $r0, $r1, $r2, $r3, $r4, $r5, $r6, $r8, $r9, $r10, $r12
; CHECK: tSTRi killed $r0, $r1, 0, 14 /* CC::al */, $noreg
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.8, implicit-def dead $cpsr
; CHECK: t2B %bb.6, 14 /* CC::al */, $noreg
; CHECK: bb.9:
; CHECK: $sp = frame-destroy t2LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $r5, def $r6, def $r7, def $r8, def $r9, def $r10, def $pc
bb.0:
successors: %bb.1
liveins: $r0, $r1, $r2, $r3, $r4, $r5, $r6, $r7, $r8, $r9, $r10, $lr
$sp = frame-setup t2STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $r5, killed $r6, killed $r7, killed $r8, killed $r9, killed $r10, killed $lr
frame-setup CFI_INSTRUCTION def_cfa_offset 32
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r10, -8
frame-setup CFI_INSTRUCTION offset $r9, -12
frame-setup CFI_INSTRUCTION offset $r8, -16
frame-setup CFI_INSTRUCTION offset $r7, -20
frame-setup CFI_INSTRUCTION offset $r6, -24
frame-setup CFI_INSTRUCTION offset $r5, -28
frame-setup CFI_INSTRUCTION offset $r4, -32
tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 11, 8, implicit-def $itstate
$sp = frame-destroy t2LDMIA_RET $sp, 11 /* CC::lt */, killed $cpsr, def $r4, def $r5, def $r6, def $r7, def $r8, def $r9, def $r10, def $pc, implicit killed $itstate
bb.1:
liveins: $r0, $r1, $r2, $r3
renamable $r12 = t2LDRi12 $sp, 32, 14 /* CC::al */, $noreg :: (load 4 from %fixed-stack.0, align 8)
$r9 = tMOVr killed $r2, 14 /* CC::al */, $noreg
renamable $r8 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
t2B %bb.2, 14 /* CC::al */, $noreg
bb.8:
successors: %bb.9(0x04000000), %bb.2(0x7c000000)
liveins: $r0, $r1, $r3, $r8, $r9, $r12
renamable $r8 = nuw nsw t2ADDri killed renamable $r8, 1, 14 /* CC::al */, $noreg, $noreg
renamable $r3, dead $cpsr = tADDi8 killed renamable $r3, 1, 14 /* CC::al */, $noreg
tCMPhir renamable $r8, renamable $r0, 14 /* CC::al */, $noreg, implicit-def $cpsr
renamable $r12 = t2ADDri killed renamable $r12, 1, 14 /* CC::al */, $noreg, $noreg
t2Bcc %bb.9, 0 /* CC::eq */, killed $cpsr
bb.2:
successors: %bb.3(0x50000000), %bb.8(0x30000000)
liveins: $r0, $r1, $r3, $r8, $r9, $r12
tCMPi8 renamable $r1, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2Bcc %bb.8, 11 /* CC::lt */, killed $cpsr
bb.3:
liveins: $r0, $r1, $r3, $r8, $r9, $r12
renamable $r4, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
$r10 = tMOVr $r12, 14 /* CC::al */, $noreg
$r2 = tMOVr $r3, 14 /* CC::al */, $noreg
t2B %bb.4, 14 /* CC::al */, $noreg
bb.7:
successors: %bb.8(0x04000000), %bb.4(0x7c000000)
liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
renamable $r4, dead $cpsr = nuw nsw tADDi8 killed renamable $r4, 1, 14 /* CC::al */, $noreg
renamable $r2, dead $cpsr = tADDi8 killed renamable $r2, 1, 14 /* CC::al */, $noreg
tCMPr renamable $r4, renamable $r1, 14 /* CC::al */, $noreg, implicit-def $cpsr
renamable $r10 = t2ADDri killed renamable $r10, 1, 14 /* CC::al */, $noreg, $noreg
t2Bcc %bb.8, 0 /* CC::eq */, killed $cpsr
bb.4:
successors: %bb.5(0x50000000), %bb.7(0x30000000)
liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
renamable $lr = t2WhileLoopStartLR killed renamable $r9, %bb.7, implicit-def dead $cpsr
bb.5:
liveins: $r0, $r1, $r2, $r3, $r4, $r8, $r9, $r10, $r12
$r5 = tMOVr $r10, 14 /* CC::al */, $noreg
$r6 = tMOVr $r2, 14 /* CC::al */, $noreg
t2B %bb.6, 14 /* CC::al */, $noreg
bb.6:
successors: %bb.6(0x7c000000), %bb.7(0x04000000)
liveins: $lr, $r0, $r1, $r2, $r3, $r4, $r5, $r6, $r8, $r9, $r10, $r12
tSTRi killed $r0, $r1, 0, 14 /* CC::al */, $noreg
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.6, implicit-def dead $cpsr
t2B %bb.7, 14 /* CC::al */, $noreg
bb.9:
$sp = frame-destroy t2LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $r5, def $r6, def $r7, def $r8, def $r9, def $r10, def $pc
...
---
name: backwards_branch_forwards_wls
body: |
; CHECK-LABEL: name: backwards_branch_forwards_wls
; CHECK: bb.0:
; CHECK: successors: %bb.1(0x80000000)
; CHECK: tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 11, 8, implicit-def $itstate
; CHECK: frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
; CHECK: bb.1:
; CHECK: successors: %bb.2(0x40000000), %bb.5(0x40000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.2, implicit-def dead $cpsr
; CHECK: t2B %bb.5, 14 /* CC::al */, $noreg
; CHECK: bb.2:
; CHECK: successors: %bb.4(0x40000000), %bb.3(0x40000000)
; CHECK: $lr = t2WhileLoopStartLR killed renamable $r0, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.4, 14 /* CC::al */, $noreg
; CHECK: bb.3:
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
; CHECK: bb.4:
; CHECK: successors: %bb.3(0x40000000), %bb.4(0x40000000)
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.4, implicit-def dead $cpsr
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
; CHECK: bb.5:
; CHECK: successors: %bb.5(0x40000000), %bb.2(0x40000000)
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.5, implicit-def dead $cpsr
; CHECK: t2B %bb.2, 14 /* CC::al */, $noreg
bb.0:
successors: %bb.2
liveins: $r0, $r1, $r2, $lr
tCMPi8 renamable $r0, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 11, 8, implicit-def $itstate
frame-destroy tPOP_RET 11 /* CC::lt */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
bb.2:
successors: %bb.3, %bb.5
liveins: $r0, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.3, implicit-def dead $cpsr
t2B %bb.5, 14 /* CC::al */, $noreg
bb.1:
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
bb.3:
successors: %bb.4, %bb.1
liveins: $lr, $r1, $r2
$lr = t2WhileLoopStartLR killed renamable $r0, %bb.1, implicit-def dead $cpsr
t2B %bb.4, 14 /* CC::al */, $noreg
bb.4:
successors: %bb.1, %bb.4
liveins: $lr, $r1, $r2
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.4, implicit-def dead $cpsr
t2B %bb.1, 14 /* CC::al */, $noreg
bb.5:
successors: %bb.5, %bb.3
liveins: $lr, $r1, $r2
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.5, implicit-def dead $cpsr
t2B %bb.3, 14 /* CC::al */, $noreg
...
---
name: multiple_predecessors
body: |
; CHECK-LABEL: name: multiple_predecessors
; CHECK: bb.0:
; CHECK: successors: %bb.3(0x55555555), %bb.2(0x2aaaaaab)
; CHECK: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 8
; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK: frame-setup CFI_INSTRUCTION offset $r7, -8
; CHECK: $sp = frame-setup tSUBspi $sp, 1, 14 /* CC::al */, $noreg
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 12
; CHECK: tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
; CHECK: t2IT 0, 8, implicit-def $itstate
; CHECK: tCMPi8 killed renamable $r1, 8, 0 /* CC::eq */, killed $cpsr, implicit-def $cpsr, implicit killed $itstate
; CHECK: t2Bcc %bb.2, 0 /* CC::eq */, killed $cpsr
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
; CHECK: bb.1:
; CHECK: successors: %bb.6(0x40000000), %bb.3(0x40000000)
; CHECK: renamable $lr = t2WhileLoopStartLR killed renamable $r2, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.6, 14 /* CC::al */, $noreg
; CHECK: bb.2:
; CHECK: successors: %bb.4(0x40000000), %bb.3(0x40000000)
; CHECK: renamable $lr = t2WhileLoopStartLR renamable $r2, %bb.3, implicit-def dead $cpsr
; CHECK: t2B %bb.4, 14 /* CC::al */, $noreg
; CHECK: bb.3:
; CHECK: $sp = frame-destroy tADDspi $sp, 1, 14 /* CC::al */, $noreg
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc, implicit undef $r0
; CHECK: bb.4:
; CHECK: successors: %bb.5(0x80000000)
; CHECK: renamable $r3, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
; CHECK: renamable $r1 = t2ADDri $sp, 2, 14 /* CC::al */, $noreg, $noreg
; CHECK: renamable $r0 = IMPLICIT_DEF
; CHECK: bb.5:
; CHECK: successors: %bb.5(0x7c000000), %bb.1(0x04000000)
; CHECK: renamable $q0, renamable $r0 = MVE_VIWDUPu16 killed renamable $r0, renamable $r3, 1, 0, $noreg, undef renamable $q0
; CHECK: MVE_VSTRH16_rq undef renamable $q0, renamable $r1, killed renamable $q0, 0, $noreg
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.5, implicit-def dead $cpsr
; CHECK: t2B %bb.1, 14 /* CC::al */, $noreg
; CHECK: bb.6:
; CHECK: successors: %bb.7(0x80000000)
; CHECK: renamable $r3, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
; CHECK: bb.7:
; CHECK: successors: %bb.7(0x7c000000), %bb.3(0x04000000)
; CHECK: renamable $q0, renamable $r0 = MVE_VIWDUPu16 killed renamable $r0, renamable $r3, 2, 0, $noreg, undef renamable $q0
; CHECK: MVE_VSTRH16_rq undef renamable $q0, renamable $r1, killed renamable $q0, 0, $noreg
; CHECK: renamable $lr = t2LoopEndDec killed renamable $lr, %bb.7, implicit-def dead $cpsr
; CHECK: t2B %bb.3, 14 /* CC::al */, $noreg
bb.0:
successors: %bb.7(0x80000000), %bb.1(0x40000000)
liveins: $r0, $r1, $r2, $r7, $lr
frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
frame-setup CFI_INSTRUCTION def_cfa_offset 8
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r7, -8
$sp = frame-setup tSUBspi $sp, 1, 14 /* CC::al */, $noreg
frame-setup CFI_INSTRUCTION def_cfa_offset 12
tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 0, 8, implicit-def $itstate
tCMPi8 killed renamable $r1, 8, 0 /* CC::eq */, killed $cpsr, implicit-def $cpsr, implicit killed $itstate
t2Bcc %bb.1, 0 /* CC::eq */, killed $cpsr
bb.7:
$sp = frame-destroy tADDspi $sp, 1, 14 /* CC::al */, $noreg
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc, implicit undef $r0
bb.1:
successors: %bb.3(0x40000000), %bb.7(0x40000000)
liveins: $r2
renamable $lr = t2WhileLoopStartLR renamable $r2, %bb.7, implicit-def dead $cpsr
t2B %bb.3, 14 /* CC::al */, $noreg
bb.3:
successors: %bb.4(0x80000000)
liveins: $lr, $r2
renamable $r3, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
renamable $r1 = t2ADDri $sp, 2, 14 /* CC::al */, $noreg, $noreg
renamable $r0 = IMPLICIT_DEF
bb.4:
successors: %bb.4(0x7c000000), %bb.2(0x04000000)
liveins: $lr, $r0, $r1, $r2, $r3
renamable $q0, renamable $r0 = MVE_VIWDUPu16 killed renamable $r0, renamable $r3, 1, 0, $noreg, undef renamable $q0
MVE_VSTRH16_rq undef renamable $q0, renamable $r1, killed renamable $q0, 0, $noreg
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.4, implicit-def dead $cpsr
t2B %bb.2, 14 /* CC::al */, $noreg
bb.2:
successors: %bb.5(0x40000000), %bb.7(0x40000000)
liveins: $r0, $r1, $r2
renamable $lr = t2WhileLoopStartLR killed renamable $r2, %bb.7, implicit-def dead $cpsr
t2B %bb.5, 14 /* CC::al */, $noreg
bb.5:
successors: %bb.6(0x80000000)
liveins: $lr, $r0, $r1
renamable $r3, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
bb.6:
successors: %bb.6(0x7c000000), %bb.7(0x04000000)
liveins: $lr, $r0, $r1, $r3
renamable $q0, renamable $r0 = MVE_VIWDUPu16 killed renamable $r0, renamable $r3, 2, 0, $noreg, undef renamable $q0
MVE_VSTRH16_rq undef renamable $q0, renamable $r1, killed renamable $q0, 0, $noreg
renamable $lr = t2LoopEndDec killed renamable $lr, %bb.6, implicit-def dead $cpsr
t2B %bb.7, 14 /* CC::al */, $noreg
...
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