llvm/test/Analysis/ScalarEvolution/udiv.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6
; RUN: opt -S -passes='print<scalar-evolution>' -disable-output < %s 2>&1 | FileCheck %s

declare void @noundef(i8 noundef)

define i8 @udiv_zero(i8 %x) {
; CHECK-LABEL: 'udiv_zero'
; CHECK-NEXT:  Classifying expressions for: @udiv_zero
; CHECK-NEXT:    %div = udiv i8 0, %x
; CHECK-NEXT:    --> 0 U: [0,1) S: [0,1)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_zero
;
  %div = udiv i8 0, %x
  ret i8 %div
}

define i8 @udiv_by_one(i8 %x) {
; CHECK-LABEL: 'udiv_by_one'
; CHECK-NEXT:  Classifying expressions for: @udiv_by_one
; CHECK-NEXT:    %div = udiv i8 %x, 1
; CHECK-NEXT:    --> %x U: full-set S: full-set
; CHECK-NEXT:  Determining loop execution counts for: @udiv_by_one
;
  %div = udiv i8 %x, 1
  ret i8 %div
}

define i8 @udiv_mul_nuw_const_by_const1(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: 'udiv_mul_nuw_const_by_const1'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_nuw_const_by_const1
; CHECK-NEXT:    %mul = mul i8 %x, 3
; CHECK-NEXT:    --> (3 * %x)<nuw><nsw> U: [0,46) S: [0,46)
; CHECK-NEXT:    %div = udiv i8 %mul, 3
; CHECK-NEXT:    --> %x U: [0,16) S: [0,16)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_nuw_const_by_const1
;
  %mul = mul i8 %x, 3
  %div = udiv i8 %mul, 3
  ret i8 %div
}

define i8 @udiv_mul_nuw_const_by_const2(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: 'udiv_mul_nuw_const_by_const2'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_nuw_const_by_const2
; CHECK-NEXT:    %mul = mul i8 %x, 6
; CHECK-NEXT:    --> (6 * %x)<nuw><nsw> U: [0,91) S: [0,91)
; CHECK-NEXT:    %div = udiv i8 %mul, 3
; CHECK-NEXT:    --> (2 * %x)<nuw><nsw> U: [0,31) S: [0,31)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_nuw_const_by_const2
;
  %mul = mul i8 %x, 6
  %div = udiv i8 %mul, 3
  ret i8 %div
}

define i8 @udiv_mul_nuw_const_by_const_common_factor(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: 'udiv_mul_nuw_const_by_const_common_factor'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_nuw_const_by_const_common_factor
; CHECK-NEXT:    %mul = mul i8 %x, 6
; CHECK-NEXT:    --> (6 * %x)<nuw><nsw> U: [0,91) S: [0,91)
; CHECK-NEXT:    %div = udiv i8 %mul, 4
; CHECK-NEXT:    --> ((3 * %x)<nuw><nsw> /u 2) U: [0,23) S: [0,23)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_nuw_const_by_const_common_factor
;
  %mul = mul i8 %x, 6
  %div = udiv i8 %mul, 4
  ret i8 %div
}

define i8 @udiv_mul_nuw_const_by_const_no_common_factor(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: 'udiv_mul_nuw_const_by_const_no_common_factor'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_nuw_const_by_const_no_common_factor
; CHECK-NEXT:    %mul = mul i8 %x, 7
; CHECK-NEXT:    --> (7 * %x)<nuw><nsw> U: [0,106) S: [0,106)
; CHECK-NEXT:    %div = udiv i8 %mul, 4
; CHECK-NEXT:    --> ((7 * %x)<nuw><nsw> /u 4) U: [0,27) S: [0,27)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_nuw_const_by_const_no_common_factor
;
  %mul = mul i8 %x, 7
  %div = udiv i8 %mul, 4
  ret i8 %div
}

define i8 @udiv_mul_const_by_const_not_nuw(i8 %x) {
; CHECK-LABEL: 'udiv_mul_const_by_const_not_nuw'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_const_by_const_not_nuw
; CHECK-NEXT:    %mul = mul i8 %x, 3
; CHECK-NEXT:    --> (3 * %x) U: full-set S: full-set
; CHECK-NEXT:    %div = udiv i8 %mul, 3
; CHECK-NEXT:    --> ((3 * %x) /u 3) U: [0,86) S: [0,86)
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_const_by_const_not_nuw
;
  %mul = mul i8 %x, 3
  %div = udiv i8 %mul, 3
  ret i8 %div
}

define i8 @udiv_mul_nuw_by_factor(i8 %x, i8 %y) {
; CHECK-LABEL: 'udiv_mul_nuw_by_factor'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_nuw_by_factor
; CHECK-NEXT:    %mul = mul nuw i8 %x, %y
; CHECK-NEXT:    --> (%x * %y)<nuw> U: full-set S: full-set
; CHECK-NEXT:    %div = udiv i8 %mul, %y
; CHECK-NEXT:    --> %x U: full-set S: full-set
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_nuw_by_factor
;
  %mul = mul nuw i8 %x, %y
  call void @noundef(i8 %mul)
  %div = udiv i8 %mul, %y
  ret i8 %div
}

define i8 @udiv_mul_by_factor_not_nuw(i8 %x, i8 %y) {
; CHECK-LABEL: 'udiv_mul_by_factor_not_nuw'
; CHECK-NEXT:  Classifying expressions for: @udiv_mul_by_factor_not_nuw
; CHECK-NEXT:    %mul = mul i8 %x, %y
; CHECK-NEXT:    --> (%x * %y) U: full-set S: full-set
; CHECK-NEXT:    %div = udiv i8 %mul, %y
; CHECK-NEXT:    --> ((%x * %y) /u %y) U: full-set S: full-set
; CHECK-NEXT:  Determining loop execution counts for: @udiv_mul_by_factor_not_nuw
;
  %mul = mul i8 %x, %y
  %div = udiv i8 %mul, %y
  ret i8 %div
}