llvm/test/Transforms/IndVarSimplify/iv-ext-samesign.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=indvars -S | FileCheck %s

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"

define i32 @iv_zext_zext_sgt_slt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_sgt_slt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER:%.*]] = phi i32 [ [[IV_OUTER_1:%.*]], %[[PH]] ], [ [[ITER_COUNT]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER_1]] = add nsw i32 [[IV_OUTER]], -1
; CHECK-NEXT:    [[EXT_OUTER:%.*]] = zext nneg i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[EXT_OUTER]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i32 [[IV_OUTER]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_zext_zext_gt_slt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_gt_slt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT3:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT3]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER:%.*]] = phi i32 [ [[IV_OUTER_1:%.*]], %[[PH]] ], [ [[ITER_COUNT]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER_1]] = add nsw i32 [[IV_OUTER]], -1
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = zext nneg i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i32 [[IV_OUTER]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_zext_zext_gt_slt_exitlimit(i32 %iter.count, i32 %exit.limit, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_gt_slt_exitlimit(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], i32 [[EXIT_LIMIT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[EXIT_LIMIT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1:%.*]] = phi i64 [ [[INDVARS_IV_NEXT2:%.*]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT2]] = add nsw i64 [[INDVARS_IV1]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i64 [[INDVARS_IV1]], [[TMP1]]
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXIT_COND_INNER:%.*]] = icmp slt i64 [[INDVARS_IV_NEXT]], [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    br i1 [[EXIT_COND_INNER]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, %exit.limit
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_zext_zext_sgt_lt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_sgt_lt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER:%.*]] = phi i32 [ [[IV_OUTER_1:%.*]], %[[PH]] ], [ [[ITER_COUNT]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER_1]] = add nsw i32 [[IV_OUTER]], -1
; CHECK-NEXT:    [[EXT_OUTER:%.*]] = zext nneg i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[EXT_OUTER]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i32 [[IV_OUTER]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_zext_zext_sgt_lt_exitlimit(i32 %iter.count, i32 %exit.limit, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_sgt_lt_exitlimit(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], i32 [[EXIT_LIMIT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[IV_OUTER:%.*]] = phi i32 [ [[IV_OUTER_1:%.*]], %[[PH]] ], [ [[ITER_COUNT]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER_1]] = add nsw i32 [[IV_OUTER]], -1
; CHECK-NEXT:    [[EXT_OUTER:%.*]] = zext nneg i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[EXT_OUTER]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i32 [[IV_OUTER]], [[EXIT_LIMIT]]
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[TMP1:%.*]] = zext i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXIT_COND_INNER:%.*]] = icmp samesign ult i64 [[INDVARS_IV_NEXT]], [[TMP1]]
; CHECK-NEXT:    br i1 [[EXIT_COND_INNER]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, %exit.limit
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_zext_zext_gt_lt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_zext_zext_gt_lt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER:%.*]] = phi i32 [ [[IV_OUTER_1:%.*]], %[[PH]] ], [ [[ITER_COUNT]], %[[ENTRY]] ]
; CHECK-NEXT:    [[IV_OUTER_1]] = add nsw i32 [[IV_OUTER]], -1
; CHECK-NEXT:    [[EXT_OUTER:%.*]] = zext nneg i32 [[IV_OUTER_1]] to i64
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[EXT_OUTER]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i32 [[IV_OUTER]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = zext nneg i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = zext nneg i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_sgt_slt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_sgt_slt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV3:%.*]] = phi i64 [ [[INDVARS_IV_NEXT4:%.*]], %[[PH]] ], [ [[TMP1]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT4]] = add nsw i64 [[INDVARS_IV3]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT4]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i64 [[INDVARS_IV3]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_gt_slt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_gt_slt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP1:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT3:%.*]] = add i32 [[INDVARS_IV2:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1:%.*]] = phi i64 [ [[INDVARS_IV_NEXT2:%.*]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV2]] = phi i32 [ [[INDVARS_IV_NEXT3]], %[[PH]] ], [ [[TMP1]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT2]] = add nsw i64 [[INDVARS_IV1]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i64 [[INDVARS_IV1]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV2]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_gt_slt_exitlimit(i32 %iter.count, i32 %exit.limit, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_gt_slt_exitlimit(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], i32 [[EXIT_LIMIT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[EXIT_LIMIT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1:%.*]] = phi i64 [ [[INDVARS_IV_NEXT2:%.*]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT2]] = add nsw i64 [[INDVARS_IV1]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i64 [[INDVARS_IV1]], [[TMP1]]
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXIT_COND_INNER:%.*]] = icmp slt i64 [[INDVARS_IV_NEXT]], [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    br i1 [[EXIT_COND_INNER]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, %exit.limit
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp slt i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_sgt_lt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_sgt_lt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV3:%.*]] = phi i64 [ [[INDVARS_IV_NEXT4:%.*]], %[[PH]] ], [ [[TMP1]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT4]] = add nsw i64 [[INDVARS_IV3]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT4]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i64 [[INDVARS_IV3]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_sgt_lt_exitlimit(i32 %iter.count, i32 %exit.limit, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_sgt_lt_exitlimit(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], i32 [[EXIT_LIMIT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    [[TMP4:%.*]] = sext i32 [[EXIT_LIMIT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV1:%.*]] = phi i64 [ [[INDVARS_IV_NEXT2:%.*]], %[[PH]] ], [ [[TMP1]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT2]] = add nsw i64 [[INDVARS_IV1]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp sgt i64 [[INDVARS_IV1]], [[TMP4]]
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXIT_COND_INNER:%.*]] = icmp samesign ult i64 [[INDVARS_IV_NEXT]], [[INDVARS_IV_NEXT2]]
; CHECK-NEXT:    br i1 [[EXIT_COND_INNER]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp sgt i32 %iv.outer, %exit.limit
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}

define i32 @iv_sext_sext_gt_lt(i32 %iter.count, ptr %ptr) {
; CHECK-LABEL: define i32 @iv_sext_sext_gt_lt(
; CHECK-SAME: i32 [[ITER_COUNT:%.*]], ptr [[PTR:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i32 [[ITER_COUNT]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[ITER_COUNT]] to i64
; CHECK-NEXT:    br label %[[OUTER_LOOP:.*]]
; CHECK:       [[PH_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[PH:.*]]
; CHECK:       [[PH]]:
; CHECK-NEXT:    [[INDVARS_IV_NEXT2:%.*]] = add i32 [[INDVARS_IV1:%.*]], -1
; CHECK-NEXT:    br label %[[OUTER_LOOP]]
; CHECK:       [[OUTER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV3:%.*]] = phi i64 [ [[INDVARS_IV_NEXT4:%.*]], %[[PH]] ], [ [[TMP1]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV1]] = phi i32 [ [[INDVARS_IV_NEXT2]], %[[PH]] ], [ [[TMP0]], %[[ENTRY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT4]] = add nsw i64 [[INDVARS_IV3]], -1
; CHECK-NEXT:    [[GEP_OUTER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV_NEXT4]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_OUTER]], align 1
; CHECK-NEXT:    [[EXIT_COND_OUTER:%.*]] = icmp samesign ugt i64 [[INDVARS_IV3]], 1
; CHECK-NEXT:    br i1 [[EXIT_COND_OUTER]], label %[[INNER_LOOP_PREHEADER:.*]], label %[[PH]]
; CHECK:       [[INNER_LOOP_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[INDVARS_IV1]] to i64
; CHECK-NEXT:    br label %[[INNER_LOOP:.*]]
; CHECK:       [[INNER_LOOP]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[INNER_LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[INNER_LOOP]] ]
; CHECK-NEXT:    [[GEP_INNER:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i8 0, ptr [[GEP_INNER]], align 1
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[INNER_LOOP]], label %[[PH_LOOPEXIT]]
; CHECK:       [[EXIT:.*:]]
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %outer.loop

ph:
  br label %outer.loop

outer.loop:
  %iv.outer = phi i32 [ %iv.outer.1, %ph ], [ %iter.count, %entry ]
  %iv.outer.1 = add nsw i32 %iv.outer, -1
  %ext.outer = sext i32 %iv.outer.1 to i64
  %gep.outer = getelementptr i8, ptr %ptr, i64 %ext.outer
  store i8 0, ptr %gep.outer
  %exit.cond.outer = icmp samesign ugt i32 %iv.outer, 1
  br i1 %exit.cond.outer, label %inner.loop, label %ph

inner.loop:
  %iv.inner = phi i32 [ %iv.next, %inner.loop ], [ 0, %outer.loop ]
  %ext.inner = sext i32 %iv.inner to i64
  %gep.inner = getelementptr i8, ptr %ptr, i64 %ext.inner
  store i8 0, ptr %gep.inner
  %iv.next = add nuw nsw i32 %iv.inner, 1
  %exit.cond.inner = icmp samesign ult i32 %iv.next, %iv.outer.1
  br i1 %exit.cond.inner, label %inner.loop, label %ph

exit:
  ret i32 0
}