derek.holloway
7502bf64a4
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44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc -mattr=mul,movw < %s -mtriple=avr | FileCheck %s
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; Tests lowering of multiplication to hardware instructions.
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define i8 @mult8(i8 %a, i8 %b) {
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; CHECK-LABEL: mult8:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: muls r22, r24
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; CHECK-NEXT: clr r1
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; CHECK-NEXT: mov r24, r0
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; CHECK-NEXT: ret
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%mul = mul i8 %b, %a
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ret i8 %mul
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}
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define i16 @mult16(i16 %a, i16 %b) {
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; CHECK-LABEL: mult16:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: muls r22, r25
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; CHECK-NEXT: mov r25, r0
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; CHECK-NEXT: clr r1
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; CHECK-NEXT: mul r22, r24
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; CHECK-NEXT: mov r18, r0
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; CHECK-NEXT: mov r19, r1
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; CHECK-NEXT: clr r1
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; CHECK-NEXT: add r19, r25
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; CHECK-NEXT: muls r23, r24
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; CHECK-NEXT: clr r1
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; CHECK-NEXT: mov r24, r0
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; CHECK-NEXT: add r24, r19
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; CHECK-NEXT: mov r20, r24
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; CHECK-NEXT: clr r21
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; CHECK-NEXT: mov r21, r20
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; CHECK-NEXT: clr r20
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; CHECK-NEXT: mov r24, r18
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; CHECK-NEXT: clr r25
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; CHECK-NEXT: or r24, r20
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; CHECK-NEXT: or r25, r21
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; CHECK-NEXT: ret
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%mul = mul nsw i16 %b, %a
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ret i16 %mul
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}
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