llvm/test/Transforms/LoopLoadElim/non-const-distance.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -passes=loop-load-elim -S %s | FileCheck %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"

define void @non_const_distance(i64 %start, ptr %A, i1 %c) {
; CHECK-LABEL: define void @non_const_distance(
; CHECK-SAME: i64 [[START:%.*]], ptr [[A:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[C]], i64 1, i64 0
; CHECK-NEXT:    [[SEL_NOT:%.*]] = xor i64 [[SEL]], -1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[START]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr i32, ptr [[PTR_IV]], i64 [[SEL_NOT]]
; CHECK-NEXT:    [[L:%.*]] = load i32, ptr [[ADD_PTR]], align 4
; CHECK-NEXT:    store i32 [[L]], ptr [[PTR_IV]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 4
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], 1000
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %sel = select i1 %c, i64 1, i64 0
  %sel.not = xor i64 %sel, -1
  br label %loop

loop:
  %iv = phi i64 [ %start, %entry ], [ %iv.next, %loop ]
  %ptr.iv = phi ptr [ %A, %entry ], [ %ptr.iv.next, %loop ]
  %add.ptr = getelementptr i32, ptr %ptr.iv, i64 %sel.not
  %l = load i32, ptr %add.ptr, align 4
  store i32 %l, ptr %ptr.iv, align 4
  %iv.next = add i64 %iv, 1
  %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 4
  %ec = icmp eq i64 %iv, 1000
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}