llvm-project/llvm/test/Transforms/InstCombine/recurrence.ll

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

define i64 @test_or(i64 %a) {
; CHECK-LABEL: @test_or(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = or i64 [[A:%.*]], 15
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = or i64 %iv, 15
  tail call void @use(i64 %iv.next)
  br label %loop
}


define i64 @test_or2(i64 %a, i64 %b) {
; CHECK-LABEL: @test_or2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = or i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = or i64 %iv, %b
  tail call void @use(i64 %iv.next)
  br label %loop
}

define i64 @test_or3(i64 %a, i64 %b) {
; CHECK-LABEL: @test_or3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = or i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = or i64 %b, %iv
  tail call void @use(i64 %iv.next)
  br label %loop
}

define i64 @test_or4(i64 %a, i64* %p) {
; CHECK-LABEL: @test_or4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[STEP:%.*]] = load volatile i64, i64* [[P:%.*]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = or i64 [[IV]], [[STEP]]
; CHECK-NEXT:    tail call void @use(i64 [[IV_NEXT]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %step = load volatile i64, i64* %p
  %iv.next = or i64 %iv, %step
  tail call void @use(i64 %iv.next)
  br label %loop
}

define i64 @test_and(i64 %a) {
; CHECK-LABEL: @test_and(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = and i64 [[A:%.*]], 15
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = and i64 %iv, 15
  tail call void @use(i64 %iv.next)
  br label %loop
}


define i64 @test_and2(i64 %a, i64 %b) {
; CHECK-LABEL: @test_and2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = and i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = and i64 %iv, %b
  tail call void @use(i64 %iv.next)
  br label %loop
}

define i64 @test_and3(i64 %a, i64 %b) {
; CHECK-LABEL: @test_and3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[TMP0:%.*]] = and i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    tail call void @use(i64 [[TMP0]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %iv.next = and i64 %b, %iv
  tail call void @use(i64 %iv.next)
  br label %loop
}


define i64 @test_and4(i64 %a, i64* %p) {
; CHECK-LABEL: @test_and4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[STEP:%.*]] = load volatile i64, i64* [[P:%.*]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = and i64 [[IV]], [[STEP]]
; CHECK-NEXT:    tail call void @use(i64 [[IV_NEXT]])
; CHECK-NEXT:    br label [[LOOP]]
;
entry:
  br label %loop

loop:                                             ; preds = %loop, %entry
  %iv = phi i64 [ %a, %entry ], [ %iv.next, %loop ]
  %step = load volatile i64, i64* %p
  %iv.next = and i64 %iv, %step
  tail call void @use(i64 %iv.next)
  br label %loop
}

declare void @use(i64)