; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"


target triple = "x86_64-apple-darwin10.0.0"

%struct.foo = type { i32, i32 }
%struct.foo1 = type { i32, i32, i32 }

;void bar1(foo_t *f, unsigned n) {
;  for (unsigned i = 0; i < n; ++i) {
;    f[i].a = 2;
;    f[i].b = 2;
;  }
;}


define void @bar1(ptr %f, i32 %n) nounwind ssp {
; CHECK-LABEL: @bar1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[TMP0]], 2
; CHECK-NEXT:    call void @llvm.experimental.memset.pattern.p0.i32.i64(ptr align 4 [[F:%.*]], i32 2, i64 [[TMP1]], i1 false)
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[F]], i64 [[INDVARS_IV]], i32 0
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[F]], i64 [[INDVARS_IV]], i32 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  %cmp1 = icmp eq i32 %n, 0
  br i1 %cmp1, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %a = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 0
  store i32 2, ptr %a, align 4
  %b = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 1
  store i32 2, ptr %b, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.body, label %for.end.loopexit

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

;void bar2(foo_t *f, unsigned n) {
;  for (unsigned i = 0; i < n; ++i) {
;    f[i].b = 2;
;    f[i].a = 2;
;  }
;}
define void @bar2(ptr %f, i32 %n) nounwind ssp {
; CHECK-LABEL: @bar2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[TMP0]], 2
; CHECK-NEXT:    call void @llvm.experimental.memset.pattern.p0.i32.i64(ptr align 4 [[F:%.*]], i32 2, i64 [[TMP1]], i1 false)
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[F]], i64 [[INDVARS_IV]], i32 1
; CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[F]], i64 [[INDVARS_IV]], i32 0
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  %cmp1 = icmp eq i32 %n, 0
  br i1 %cmp1, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %b = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 1
  store i32 2, ptr %b, align 4
  %a = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 0
  store i32 2, ptr %a, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.body, label %for.end.loopexit

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

;void bar3(foo_t *f, unsigned n) {
;  for (unsigned i = n; i > 0; --i) {
;    f[i].a = 2;
;    f[i].b = 2;
;  }
;}
define void @bar3(ptr nocapture %f, i32 %n) nounwind ssp {
; CHECK-LABEL: @bar3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = shl nuw nsw i64 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = add i32 [[N]], -1
; CHECK-NEXT:    [[TMP3:%.*]] = zext i32 [[TMP2]] to i64
; CHECK-NEXT:    [[TMP4:%.*]] = shl nuw nsw i64 [[TMP3]], 3
; CHECK-NEXT:    [[TMP5:%.*]] = sub i64 [[TMP1]], [[TMP4]]
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[F:%.*]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP7:%.*]] = mul i64 [[TMP0]], 2
; CHECK-NEXT:    call void @llvm.experimental.memset.pattern.p0.i32.i64(ptr align 4 [[UGLYGEP]], i32 2, i64 [[TMP7]], i1 false)
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[TMP0]], [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[F]], i64 [[INDVARS_IV]], i32 0
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[F]], i64 [[INDVARS_IV]], i32 1
; CHECK-NEXT:    [[TMP6:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[DEC:%.*]] = add i32 [[TMP6]], -1
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[DEC]], 0
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], -1
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_END_LOOPEXIT:%.*]], label [[FOR_BODY]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  %cmp1 = icmp eq i32 %n, 0
  br i1 %cmp1, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  %0 = zext i32 %n to i64
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ %0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %a = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 0
  store i32 2, ptr %a, align 4
  %b = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 1
  store i32 2, ptr %b, align 4
  %1 = trunc i64 %indvars.iv to i32
  %dec = add i32 %1, -1
  %cmp = icmp eq i32 %dec, 0
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  br i1 %cmp, label %for.end.loopexit, label %for.body

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

;void bar4(foo_t *f, unsigned n) {
;  for (unsigned i = 0; i < n; ++i) {
;    f[i].a = 0;
;    f[i].b = 1;
;  }
;}
define void @bar4(ptr nocapture %f, i32 %n) nounwind ssp {
; CHECK-LABEL: @bar4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[F:%.*]], i64 [[INDVARS_IV]], i32 0
; CHECK-NEXT:    store i32 0, ptr [[A]], align 4
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[F]], i64 [[INDVARS_IV]], i32 1
; CHECK-NEXT:    store i32 1, ptr [[B]], align 4
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  %cmp1 = icmp eq i32 %n, 0
  br i1 %cmp1, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %a = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 0
  store i32 0, ptr %a, align 4
  %b = getelementptr inbounds %struct.foo, ptr %f, i64 %indvars.iv, i32 1
  store i32 1, ptr %b, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.body, label %for.end.loopexit

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

;void bar5(foo1_t *f, unsigned n) {
;  for (unsigned i = 0; i < n; ++i) {
;    f[i].a = 1;
;    f[i].b = 1;
;  }
;}
define void @bar5(ptr nocapture %f, i32 %n) nounwind ssp {
; CHECK-LABEL: @bar5(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[A:%.*]] = getelementptr inbounds [[STRUCT_FOO1:%.*]], ptr [[F:%.*]], i64 [[INDVARS_IV]], i32 0
; CHECK-NEXT:    store i32 1, ptr [[A]], align 4
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO1]], ptr [[F]], i64 [[INDVARS_IV]], i32 1
; CHECK-NEXT:    store i32 1, ptr [[B]], align 4
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;
entry:
  %cmp1 = icmp eq i32 %n, 0
  br i1 %cmp1, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %a = getelementptr inbounds %struct.foo1, ptr %f, i64 %indvars.iv, i32 0
  store i32 1, ptr %a, align 4
  %b = getelementptr inbounds %struct.foo1, ptr %f, i64 %indvars.iv, i32 1
  store i32 1, ptr %b, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.body, label %for.end.loopexit

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}
;.
; CHECK: attributes #[[ATTR0:[0-9]+]] = { nounwind ssp }
; CHECK: attributes #[[ATTR1:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: write) }
;.