entry:
unreachable
}
+
+ define void @no_preheader(i32 %N, i32 %M, i32* nocapture %a, i32* nocapture %b, i32* nocapture %c) local_unnamed_addr #0 {
+ entry:
+ unreachable
+ }
+
+ declare dso_local i32 @g(...) local_unnamed_addr #1
+
+ declare dso_local i32 @h(...) local_unnamed_addr #1
+
...
---
name: backwards_branch
t2B %bb.1, 14 /* CC::al */, $noreg
...
+---
+name: no_preheader
+body: |
+ ; CHECK-LABEL: name: no_preheader
+ ; 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
+...