derek.holloway
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67 lines
1.8 KiB
LLVM
67 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc < %s -mtriple=avr -mattr=+movw | FileCheck %s --check-prefix=MOVW
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; RUN: llc < %s -mtriple=avr -mattr=-movw | FileCheck %s --check-prefix=NOMOVW
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define i16 @food(ptr %this) {
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; MOVW-LABEL: food:
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; MOVW: ; %bb.0: ; %entry
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; MOVW-NEXT: movw r30, r24
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; MOVW-NEXT: ldd r24, Z+25
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; MOVW-NEXT: clr r25
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; MOVW-NEXT: ldd r18, Z+26
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; MOVW-NEXT: clr r19
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; MOVW-NEXT: sub r24, r18
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; MOVW-NEXT: sbc r25, r19
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; MOVW-NEXT: andi r24, 63
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; MOVW-NEXT: andi r25, 0
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; MOVW-NEXT: ret
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;
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; NOMOVW-LABEL: food:
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; NOMOVW: ; %bb.0: ; %entry
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; NOMOVW-NEXT: mov r30, r24
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; NOMOVW-NEXT: mov r31, r25
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; NOMOVW-NEXT: ldd r24, Z+25
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; NOMOVW-NEXT: clr r25
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; NOMOVW-NEXT: ldd r18, Z+26
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; NOMOVW-NEXT: clr r19
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; NOMOVW-NEXT: sub r24, r18
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; NOMOVW-NEXT: sbc r25, r19
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; NOMOVW-NEXT: andi r24, 63
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; NOMOVW-NEXT: andi r25, 0
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; NOMOVW-NEXT: ret
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entry:
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%_rx_buffer_head = getelementptr inbounds nuw i8, ptr %this, i16 25
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%0 = load volatile i8, ptr %_rx_buffer_head
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%conv = zext i8 %0 to i16
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%_rx_buffer_tail = getelementptr inbounds nuw i8, ptr %this, i16 26
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%1 = load volatile i8, ptr %_rx_buffer_tail
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%conv2 = zext i8 %1 to i16
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%sub = sub nsw i16 %conv, %conv2
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%rem = and i16 %sub, 63
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ret i16 %rem
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}
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define i16 @fooe(i8 %a) {
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; MOVW-LABEL: fooe:
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; MOVW: ; %bb.0:
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; MOVW-NEXT: clr r25
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; MOVW-NEXT: subi r24, 0
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; MOVW-NEXT: sbci r25, 1
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; MOVW-NEXT: andi r24, 1
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; MOVW-NEXT: andi r25, 0
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; MOVW-NEXT: ret
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;
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; NOMOVW-LABEL: fooe:
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; NOMOVW: ; %bb.0:
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; NOMOVW-NEXT: clr r25
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; NOMOVW-NEXT: subi r24, 0
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; NOMOVW-NEXT: sbci r25, 1
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; NOMOVW-NEXT: andi r24, 1
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; NOMOVW-NEXT: andi r25, 0
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; NOMOVW-NEXT: ret
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%1 = zext i8 %a to i16
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%2 = sub i16 %1, 256
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%3 = and i16 %2, 1
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ret i16 %3
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}
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