xref: /llvm-project/llvm/test/Transforms/InstCombine/div-i1.ll (revision d01aec4c769d50fb92e86decd41d077c94105841)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

define i1 @sdiv_by_zero_indirect_is_poison(i1 %c, i1 %x, i1 %y) {
; CHECK-LABEL: @sdiv_by_zero_indirect_is_poison(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    br label [[DONE:%.*]]
; CHECK:       false:
; CHECK-NEXT:    br label [[DONE]]
; CHECK:       done:
; CHECK-NEXT:    ret i1 poison
;
  br i1 %c, label %true, label %false
true:
  %y_true = and i1 %y, 0
  br label %done
false:
  %y_false = and i1 %y, 0
  br label %done
done:
  %yy = phi i1 [ %y_false, %false ], [ %y_true, %true ]
  %r = sdiv i1 %x, %yy
  ret i1 %r
}

define i1 @udiv_by_zero_indirect_is_poison(i1 %c, i1 %x, i1 %y) {
; CHECK-LABEL: @udiv_by_zero_indirect_is_poison(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    br label [[DONE:%.*]]
; CHECK:       false:
; CHECK-NEXT:    br label [[DONE]]
; CHECK:       done:
; CHECK-NEXT:    ret i1 poison
;
  br i1 %c, label %true, label %false
true:
  %y_true = and i1 %y, 0
  br label %done
false:
  %y_false = and i1 %y, 0
  br label %done
done:
  %yy = phi i1 [ %y_false, %false ], [ %y_true, %true ]
  %r = udiv i1 %x, %yy
  ret i1 %r
}

define i1 @srem_by_zero_indirect_is_poison(i1 %c, i1 %x, i1 %y) {
; CHECK-LABEL: @srem_by_zero_indirect_is_poison(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    br label [[DONE:%.*]]
; CHECK:       false:
; CHECK-NEXT:    br label [[DONE]]
; CHECK:       done:
; CHECK-NEXT:    ret i1 poison
;
  br i1 %c, label %true, label %false
true:
  %y_true = and i1 %y, 0
  br label %done
false:
  %y_false = and i1 %y, 0
  br label %done
done:
  %yy = phi i1 [ %y_false, %false ], [ %y_true, %true ]
  %r = srem i1 %x, %yy
  ret i1 %r
}

define i1 @urem_by_zero_indirect_is_poison(i1 %c, i1 %x, i1 %y) {
; CHECK-LABEL: @urem_by_zero_indirect_is_poison(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    br label [[DONE:%.*]]
; CHECK:       false:
; CHECK-NEXT:    br label [[DONE]]
; CHECK:       done:
; CHECK-NEXT:    ret i1 poison
;
  br i1 %c, label %true, label %false
true:
  %y_true = and i1 %y, 0
  br label %done
false:
  %y_false = and i1 %y, 0
  br label %done
done:
  %yy = phi i1 [ %y_false, %false ], [ %y_true, %true ]
  %r = urem i1 %x, %yy
  ret i1 %r
}

define i1 @sdiv_i1_is_op0(i1 %x, i1 %y) {
; CHECK-LABEL: @sdiv_i1_is_op0(
; CHECK-NEXT:    ret i1 [[X:%.*]]
;
  %r = sdiv i1 %x, %y
  ret i1 %r
}

define i1 @udiv_i1_is_op0(i1 %x, i1 %y) {
; CHECK-LABEL: @udiv_i1_is_op0(
; CHECK-NEXT:    ret i1 [[X:%.*]]
;
  %r = udiv i1 %x, %y
  ret i1 %r
}

define i1 @srem_i1_is_zero(i1 %x, i1 %y) {
; CHECK-LABEL: @srem_i1_is_zero(
; CHECK-NEXT:    ret i1 false
;
  %r = srem i1 %x, %y
  ret i1 %r
}

define i1 @urem_i1_is_zero(i1 %x, i1 %y) {
; CHECK-LABEL: @urem_i1_is_zero(
; CHECK-NEXT:    ret i1 false
;
  %r = urem i1 %x, %y
  ret i1 %r
}

declare void @llvm.assume(i1 noundef)

define i1 @pt62607() {
; CHECK-LABEL: @pt62607(
; CHECK-NEXT:  entry_1:
; CHECK-NEXT:    br label [[LOOP_5:%.*]]
; CHECK:       loop_5:
; CHECK-NEXT:    br i1 poison, label [[LOOP_5]], label [[LOOP_EXIT_8:%.*]]
; CHECK:       loop_exit_8:
; CHECK-NEXT:    ret i1 false
;
entry_1:
  %val_i1_38 = trunc i8 109 to i1
  br label %loop_5
loop_5:  ; preds = %loop_5, %entry_1
  %loop_cnt_i1_26.0 = phi i1 [ false, %entry_1 ], [ %val_i1_55, %loop_5 ]
  %val_i1_55 = add i1 %loop_cnt_i1_26.0, true
  call void @llvm.assume(i1 %val_i1_55)
  %val_i1_67 = udiv i1 %val_i1_38, %loop_cnt_i1_26.0
  br i1 %val_i1_67, label %loop_5, label %loop_exit_8
loop_exit_8:  ; preds = %loop_5
  ret i1 false
}