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Merged
merged 4 commits into from
Jul 20, 2025
Merged

[AVR] Emit relocation record for local branch #145291

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ac2988a
[AVR] Emit relocation record for local branch
tomtor Jun 23, 2025
75d7247
drop avr25
tomtor Jul 20, 2025
ffd854e
check tests
tomtor Jul 20, 2025
f465acc
another fix
tomtor Jul 20, 2025
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14 changes: 1 addition & 13 deletions llvm/lib/Target/AVR/MCTargetDesc/AVRAsmBackend.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -520,19 +520,7 @@ bool AVRAsmBackend::forceRelocation(const MCFragment &F, const MCFixup &Fixup,
return false;

case AVR::fixup_7_pcrel:
case AVR::fixup_13_pcrel: {
uint64_t Offset = Target.getConstant();
uint64_t Size = AVRAsmBackend::getFixupKindInfo(Fixup.getKind()).TargetSize;

// If the jump is too large to encode it, fall back to a relocation.
//
// Note that trying to actually link that relocation *would* fail, but the
// hopes are that the module we're currently compiling won't be actually
// linked to the final binary.
return !adjust::adjustRelativeBranch(Size, Fixup, Offset,
getContext().getSubtargetInfo());
}

case AVR::fixup_13_pcrel:
case AVR::fixup_call:
return true;
}
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19 changes: 6 additions & 13 deletions llvm/test/CodeGen/AVR/branch-relaxation-long-backward.ll
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@@ -1,28 +1,21 @@
; RUN: llc < %s -mtriple=avr -mcpu=attiny85 -filetype=obj -o - | llvm-objdump --mcpu=attiny85 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=ATTINY85 %s
; RUN: llc < %s -mtriple=avr -mcpu=avr25 -filetype=obj -o - | llvm-objdump --mcpu=avr25 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=AVR25 %s
; RUN: llc < %s -mtriple=avr -mcpu=avr3 -filetype=obj -o - | llvm-objdump --mcpu=avr3 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=AVR3 %s

; ATTINY85: <main>:
; ATTINY85-NEXT: andi r24, 0x1
; ATTINY85: cpi r24, 0x0
; ATTINY85-NEXT: breq .+2
; ATTINY85-NEXT: rjmp .+4086
; ATTINY85-NEXT: breq .-2
; ATTINY85-NEXT: R_AVR_7_PCREL .text+0x100c
; ATTINY85-NEXT: rjmp .-2
; ATTINY85-NEXT: R_AVR_13_PCREL .text+0x2
; ATTINY85: ldi r24, 0x3
; ATTINY85-NEXT: ret

; AVR25: <main>:
; AVR25-NEXT: andi r24, 0x1
; AVR25: cpi r24, 0x0
; AVR25-NEXT: breq .+2
; AVR25-NEXT: rjmp .-2
; AVR25-NEXT: R_AVR_13_PCREL .text+0x2
; AVR25: ldi r24, 0x3
; AVR25-NEXT: ret

; AVR3: <main>:
; AVR3-NEXT: andi r24, 0x1
; AVR3: cpi r24, 0x0
; AVR3-NEXT: breq .+4
; AVR3-NEXT: breq .-2
; AVR3-NEXT: R_AVR_7_PCREL .text+0x100e
; AVR3-NEXT: jmp 0x0
; AVR3-NEXT: R_AVR_CALL .text+0x2
; AVR3: ldi r24, 0x3
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19 changes: 6 additions & 13 deletions llvm/test/CodeGen/AVR/branch-relaxation-long-forward.ll
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@@ -1,28 +1,21 @@
; RUN: llc < %s -mtriple=avr -mcpu=attiny85 -filetype=obj -o - | llvm-objdump --mcpu=attiny85 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=ATTINY85 %s
; RUN: llc < %s -mtriple=avr -mcpu=avr25 -filetype=obj -o - | llvm-objdump --mcpu=avr25 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=AVR25 %s
; RUN: llc < %s -mtriple=avr -mcpu=avr3 -filetype=obj -o - | llvm-objdump --mcpu=avr3 -dr --no-show-raw-insn --no-leading-addr - | FileCheck --check-prefix=AVR3 %s

; ATTINY85: <main>:
; ATTINY85-NEXT: andi r24, 0x1
; ATTINY85-NEXT: cpi r24, 0x0
; ATTINY85-NEXT: brne .+2
; ATTINY85-NEXT: rjmp .-4092
; ATTINY85-NEXT: brne .-2
; ATTINY85-NEXT: R_AVR_7_PCREL .text+0x8
; ATTINY85-NEXT: rjmp .-2
; ATTINY85-NEXT: R_AVR_13_PCREL .text+0x100c
; ATTINY85: ldi r24, 0x3
; ATTINY85-NEXT: ret

; AVR25: <main>:
; AVR25-NEXT: andi r24, 0x1
; AVR25-NEXT: cpi r24, 0x0
; AVR25-NEXT: brne .+2
; AVR25-NEXT: rjmp .-2
; AVR25-NEXT: R_AVR_13_PCREL .text+0x100c
; AVR25: ldi r24, 0x3
; AVR25-NEXT: ret

; AVR3: <main>:
; AVR3-NEXT: andi r24, 0x1
; AVR3-NEXT: cpi r24, 0x0
; AVR3-NEXT: brne .+4
; AVR3-NEXT: brne .-2
; AVR3-NEXT: R_AVR_7_PCREL .text+0xa
; AVR3-NEXT: jmp 0x0
; AVR3-NEXT: R_AVR_CALL .text+0x100e
; AVR3: ldi r24, 0x3
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3 changes: 2 additions & 1 deletion llvm/test/CodeGen/AVR/jmp.ll
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Expand Up @@ -18,7 +18,8 @@ declare i8 @bar(i8);
; CHECK: rcall .-2
; CHECK-NEXT: 00000000: R_AVR_13_PCREL bar
; CHECK-NEXT: cpi r24, 0x7b
; CHECK-NEXT: brne .+4
; CHECK-NEXT: brne .-2
; CHECK-NEXT: R_AVR_7_PCREL .text+0xa
; CHECK-NEXT: ldi r24, 0x64
; CHECK-NEXT: ret
; CHECK-NEXT: ldi r24, 0xc8
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6 changes: 4 additions & 2 deletions llvm/test/MC/AVR/inst-brbc.s
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Expand Up @@ -15,8 +15,10 @@ foo:
; CHECK: brcc .Ltmp1-16+2 ; encoding: [0bAAAAA000,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 23 f4 brvc .+8
; INST-NEXT: c0 f7 brsh .-16
; INST-NEXT: fb f7 brvc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xa
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text-0xc
; INST-NEXT: 59 f7 brne .-42
; INST-NEXT: 52 f7 brpl .-44
; INST-NEXT: 4c f7 brge .-46
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6 changes: 4 additions & 2 deletions llvm/test/MC/AVR/inst-brbs.s
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Expand Up @@ -14,8 +14,10 @@ foo:
; CHECK: brcs .Ltmp1-12+2 ; encoding: [0bAAAAA000,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 23 f0 brvs .+8
; INST-NEXT: d0 f3 brlo .-12
; INST-NEXT: fb f3 brvs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xa
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x8
; INST-NEXT: 59 f3 breq .-42
; INST-NEXT: 52 f3 brmi .-44
; INST-NEXT: 4c f3 brlt .-46
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12 changes: 8 additions & 4 deletions llvm/test/MC/AVR/inst-brcc.s
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Expand Up @@ -18,7 +18,11 @@ bar:
; CHECK: brcc bar ; encoding: [0bAAAAA000,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 08 f5 brsh .+66
; INST-NEXT: a8 f7 brsh .-22
; INST-NEXT: 08 f5 brsh .+66
; INST-NEXT: 00 f4 brsh .+0
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x44
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x12
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x48
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x8
12 changes: 8 additions & 4 deletions llvm/test/MC/AVR/inst-brcs.s
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Expand Up @@ -18,7 +18,11 @@ bar:
; CHECK: brcs bar ; encoding: [0bAAAAA000,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 20 f0 brlo .+8
; INST-NEXT: 10 f0 brlo .+4
; INST-NEXT: 20 f0 brlo .+8
; INST-NEXT: 00 f0 brlo .+0
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xa
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x8
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xe
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x8
11 changes: 7 additions & 4 deletions llvm/test/MC/AVR/inst-breq.s
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Expand Up @@ -18,7 +18,10 @@ bar:
; CHECK: brbs 1, bar ; encoding: [0bAAAAA001,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: b9 f3 breq .-18
; INST-NEXT: d1 f3 breq .-12
; INST-NEXT: b9 f3 breq .-18
; INST-NEXT: 01 f0 breq .+0
; INST-NEXT: f9 f3 breq .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x10
; INST-NEXT: f9 f3 breq .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x8
; INST-NEXT: f9 f3 breq .-2
; INST-NEXT: R_AVR_7_PCREL .text-0xc
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there are four instructions, but you only show 3 results.

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Sorry, the relcation information for the last is stilling mssing.

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No relocation for next instruction target?

; INST-NEXT: f9 f3 breq .-2
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brge.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brge bar ; encoding: [0bAAAAA100,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: cc f4 brge .+50
; INST-NEXT: ac f4 brge .+42
; INST-NEXT: 04 f4 brge .+0
; INST-NEXT: fc f7 brge .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x34
; INST-NEXT: fc f7 brge .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x2e
; INST-NEXT: fc f7 brge .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brhc.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brhc bar ; encoding: [0bAAAAA101,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 35 f4 brhc .+12
; INST-NEXT: 3d f4 brhc .+14
; INST-NEXT: 05 f4 brhc .+0
; INST-NEXT: fd f7 brhc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xe
; INST-NEXT: fd f7 brhc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x12
; INST-NEXT: fd f7 brhc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brhs.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brhs bar ; encoding: [0bAAAAA101,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: fd f2 brhs .-66
; INST-NEXT: 3d f0 brhs .+14
; INST-NEXT: 05 f0 brhs .+0
; INST-NEXT: fd f3 brhs .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x40
; INST-NEXT: fd f3 brhs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x12
; INST-NEXT: fd f3 brhs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brid.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brid bar ; encoding: [0bAAAAA111,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: af f4 brid .+42
; INST-NEXT: ff f4 brid .+62
; INST-NEXT: 07 f4 brid .+0
; INST-NEXT: ff f7 brid .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x2c
; INST-NEXT: ff f7 brid .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x42
; INST-NEXT: ff f7 brid .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brie.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brie bar ; encoding: [0bAAAAA111,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 57 f0 brie .+20
; INST-NEXT: a7 f0 brie .+40
; INST-NEXT: 07 f0 brie .+0
; INST-NEXT: ff f3 brie .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x16
; INST-NEXT: ff f3 brie .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x2c
; INST-NEXT: ff f3 brie .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brlo.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brlo bar ; encoding: [0bAAAAA000,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 30 f0 brlo .+12
; INST-NEXT: 70 f0 brlo .+28
; INST-NEXT: 00 f0 brlo .+0
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xe
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x20
; INST-NEXT: f8 f3 brlo .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brlt.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brlt bar ; encoding: [0bAAAAA100,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 44 f0 brlt .+16
; INST-NEXT: 0c f0 brlt .+2
; INST-NEXT: 04 f0 brlt .+0
; INST-NEXT: fc f3 brlt .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x12
; INST-NEXT: fc f3 brlt .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
; INST-NEXT: fc f3 brlt .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brmi.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brmi bar ; encoding: [0bAAAAA010,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 0a f1 brmi .+66
; INST-NEXT: ea f0 brmi .+58
; INST-NEXT: 02 f0 brmi .+0
; INST-NEXT: fa f3 brmi .-2
; INST-NEXT: VR_7_PCREL .text+0x44
; INST-NEXT: fa f3 brmi .-2
; INST-NEXT: VR_7_PCREL .text+0x3e
; INST-NEXT: fa f3 brmi .-2
; INST-NEXT: VR_7_PCREL .text+0x6
11 changes: 7 additions & 4 deletions llvm/test/MC/AVR/inst-brne.s
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Expand Up @@ -18,7 +18,10 @@ bar:
; CHECK: brbc 1, bar ; encoding: [0bAAAAA001,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 29 f4 brne .+10
; INST-NEXT: 09 f4 brne .+2
; INST-NEXT: 29 f4 brne .+10
; INST-NEXT: 01 f4 brne .+0
; INST-NEXT: f9 f7 brne .-2
; INST-NEXT: R_AVR_7_PCREL .text+0xc
; INST-NEXT: f9 f7 brne .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
; INST-NEXT: f9 f7 brne .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x10
; INST-NEXT: f9 f7 brne .-2
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missing relocation information for the last instruction.

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I have asked you to have a careful check, but there are still spots. I can not pay too much time on llvm, epscially cost my weekend time.

9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brpl.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brpl bar ; encoding: [0bAAAAA010,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: d2 f7 brpl .-12
; INST-NEXT: 4a f4 brpl .+18
; INST-NEXT: 02 f4 brpl .+0
; INST-NEXT: fa f7 brpl .-2
; INST-NEXT: R_AVR_7_PCREL .text-0xa
; INST-NEXT: fa f7 brpl .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x16
; INST-NEXT: fa f7 brpl .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brsh.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brsh bar ; encoding: [0bAAAAA000,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 80 f4 brsh .+32
; INST-NEXT: 18 f5 brsh .+70
; INST-NEXT: 00 f4 brsh .+0
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x22
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x4a
; INST-NEXT: f8 f7 brsh .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brtc.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brtc bar ; encoding: [0bAAAAA110,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: d6 f4 brtc .+52
; INST-NEXT: ce f4 brtc .+50
; INST-NEXT: 06 f4 brtc .+0
; INST-NEXT: fe f7 brtc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x36
; INST-NEXT: fe f7 brtc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x36
; INST-NEXT: fe f7 brtc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brts.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brts bar ; encoding: [0bAAAAA110,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 4e f0 brts .+18
; INST-NEXT: 5e f0 brts .+22
; INST-NEXT: 06 f0 brts .+0
; INST-NEXT: fe f3 brts .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x14
; INST-NEXT: fe f3 brts .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x1a
; INST-NEXT: fe f3 brts .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brvc.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brvc bar ; encoding: [0bAAAAA011,0b111101AA]

; INST-LABEL: <foo>:
; INST-NEXT: 93 f7 brvc .-28
; INST-NEXT: 0b f7 brvc .-62
; INST-NEXT: 03 f4 brvc .+0
; INST-NEXT: fb f7 brvc .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x1a
; INST-NEXT: fb f7 brvc .-2
; INST-NEXT: R_AVR_7_PCREL .text-0x3a
; INST-NEXT: fb f7 brvc .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
9 changes: 6 additions & 3 deletions llvm/test/MC/AVR/inst-brvs.s
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Expand Up @@ -16,6 +16,9 @@ bar:
; CHECK: brvs bar ; encoding: [0bAAAAA011,0b111100AA]

; INST-LABEL: <foo>:
; INST-NEXT: 4b f0 brvs .+18
; INST-NEXT: 83 f0 brvs .+32
; INST-NEXT: 03 f0 brvs .+0
; INST-NEXT: fb f3 brvs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x14
; INST-NEXT: fb f3 brvs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x24
; INST-NEXT: fb f3 brvs .-2
; INST-NEXT: R_AVR_7_PCREL .text+0x6
13 changes: 8 additions & 5 deletions llvm/test/MC/AVR/inst-rcall.s
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Expand Up @@ -17,8 +17,11 @@ foo:
; CHECK: rcall .Ltmp3+46+2 ; encoding: [A,0b1101AAAA]

; INST-LABEL: <foo>:
; INST-NEXT: 00 d0 rcall .+0
; INST-NEXT: fc df rcall .-8
; INST-NEXT: 06 d0 rcall .+12
; INST-NEXT: 17 d0 rcall .+46
; INST-NEXT: ea df rcall .-44
; INST-NEXT: ff df rcall .-2
; INST-NEXT: R_AVR_13_PCREL .text+0x2
; INST-NEXT: ff df rcall .-2
; INST-NEXT: R_AVR_13_PCREL .text-0x4
; INST-NEXT: ff df rcall .-2
; INST-NEXT: R_AVR_13_PCREL .text+0x12
; INST-NEXT: ff df rcall .-2
; INST-NEXT: R_AVR_13_PCREL .text+0x36
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