llvm/test/Transforms/LoopSimplify/pr68285.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -S -passes="loop-mssa(simple-loop-unswitch<nontrivial>),loop(loop-unroll-full),loop-simplify,verify<scalar-evolution>" < %s | FileCheck %s

; Should not caused a SCEV verification failure due to incorrect
; loop dispositions.

define void @g(ptr %b, i32 %arg, i1 %tobool.not) {
; CHECK-LABEL: define void @g(
; CHECK-SAME: ptr [[B:%.*]], i32 [[ARG:%.*]], i1 [[TOBOOL_NOT:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[ENTRY_SPLIT_US:%.*]], label [[ENTRY_SPLIT:%.*]]
; CHECK:       entry.split.us:
; CHECK-NEXT:    br label [[FOR_BODY_US:%.*]]
; CHECK:       for.body.us:
; CHECK-NEXT:    br label [[LAND_END_US:%.*]]
; CHECK:       land.end.us:
; CHECK-NEXT:    store i16 0, ptr [[B]], align 1
; CHECK-NEXT:    br label [[FOR_END:%.*]]
; CHECK:       entry.split:
; CHECK-NEXT:    br label [[FOR_BODY_PEEL_BEGIN:%.*]]
; CHECK:       for.body.peel.begin:
; CHECK-NEXT:    br label [[FOR_BODY_PEEL:%.*]]
; CHECK:       for.body.peel:
; CHECK-NEXT:    br label [[LAND_RHS_PEEL:%.*]]
; CHECK:       land.rhs.peel:
; CHECK-NEXT:    [[AND_PEEL:%.*]] = and i32 -1, [[ARG]]
; CHECK-NEXT:    [[TOBOOL2_PEEL:%.*]] = icmp ne i32 [[AND_PEEL]], 0
; CHECK-NEXT:    [[DOTPRE_PEEL:%.*]] = load i32, ptr [[B]], align 1
; CHECK-NEXT:    br label [[LAND_END_PEEL:%.*]]
; CHECK:       land.end.peel:
; CHECK-NEXT:    [[IV2_PEEL:%.*]] = phi i32 [ [[DOTPRE_PEEL]], [[LAND_RHS_PEEL]] ]
; CHECK-NEXT:    [[IV3_PEEL:%.*]] = phi i1 [ [[TOBOOL2_PEEL]], [[LAND_RHS_PEEL]] ]
; CHECK-NEXT:    [[LAND_EXT_PEEL:%.*]] = zext i1 [[IV3_PEEL]] to i16
; CHECK-NEXT:    [[CMP3_PEEL:%.*]] = icmp ne i16 0, [[LAND_EXT_PEEL]]
; CHECK-NEXT:    [[CONV4_PEEL:%.*]] = zext i1 [[CMP3_PEEL]] to i16
; CHECK-NEXT:    store i16 [[LAND_EXT_PEEL]], ptr [[B]], align 1
; CHECK-NEXT:    [[CMP_PEEL:%.*]] = icmp slt i32 [[IV2_PEEL]], 0
; CHECK-NEXT:    br i1 [[CMP_PEEL]], label [[FOR_BODY_PEEL_NEXT:%.*]], label [[FOR_END_SPLIT:%.*]]
; CHECK:       for.body.peel.next:
; CHECK-NEXT:    br label [[FOR_BODY_PEEL_NEXT1:%.*]]
; CHECK:       for.body.peel.next1:
; CHECK-NEXT:    br label [[ENTRY_SPLIT_PEEL_NEWPH:%.*]]
; CHECK:       entry.split.peel.newph:
; CHECK-NEXT:    [[TOBOOL2:%.*]] = icmp ne i32 [[ARG]], 0
; CHECK-NEXT:    [[LAND_EXT:%.*]] = zext i1 [[TOBOOL2]] to i16
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    br label [[LAND_RHS:%.*]]
; CHECK:       land.rhs:
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[B]], align 1
; CHECK-NEXT:    br label [[LAND_END:%.*]]
; CHECK:       land.end:
; CHECK-NEXT:    store i16 [[LAND_EXT]], ptr [[B]], align 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[DOTPRE]], 0
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_SPLIT_LOOPEXIT:%.*]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       for.end.split.loopexit:
; CHECK-NEXT:    br label [[FOR_END_SPLIT]]
; CHECK:       for.end.split:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:                                         ; preds = %land.end, %entry
  %iv1 = phi i16 [ 0, %entry ], [ %trunc, %land.end ]
  br i1 %tobool.not, label %land.end, label %land.rhs

land.rhs:                                         ; preds = %for.body
  %and = and i32 -1, %arg
  %tobool2 = icmp ne i32 %and, 0
  %.pre = load i32, ptr %b, align 1
  br label %land.end

land.end:                                         ; preds = %land.rhs, %for.body
  %iv2 = phi i32 [ 0, %for.body ], [ %.pre, %land.rhs ]
  %iv3 = phi i1 [ false, %for.body ], [ %tobool2, %land.rhs ]
  %land.ext = zext i1 %iv3 to i16
  %cmp3 = icmp ne i16 %iv1, %land.ext
  %conv4 = zext i1 %cmp3 to i16
  store i16 %land.ext, ptr %b, align 1
  %cmp = icmp slt i32 %iv2, 0
  %trunc = trunc i32 %arg to i16
  br i1 %cmp, label %for.body, label %for.end

for.end:                                          ; preds = %land.end
  ret void
}