test/Transforms/LoopStrengthReduce/AArch64/postidx-load.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -mtriple=aarch64-none-elf | FileCheck %s

; Check that the load in the loop has postindex addressing, regardless of the
; type or whether the input uses postindex or offset addressing.

define i32 @i32_initially_postidx(ptr %p, i64 %n) {
; CHECK-LABEL: i32_initially_postidx:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    cmp x1, #1
; CHECK-NEXT:    b.lt .LBB0_5
; CHECK-NEXT:  // %bb.1: // %for.body.preheader
; CHECK-NEXT:    mov w8, wzr
; CHECK-NEXT:  .LBB0_2: // %for.body
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    ldr w9, [x0], #4
; CHECK-NEXT:    add w8, w8, w9
; CHECK-NEXT:    cmp w8, #0
; CHECK-NEXT:    b.lo .LBB0_5
; CHECK-NEXT:  // %bb.3: // %for.inc
; CHECK-NEXT:    // in Loop: Header=BB0_2 Depth=1
; CHECK-NEXT:    subs x1, x1, #1
; CHECK-NEXT:    b.ne .LBB0_2
; CHECK-NEXT:  // %bb.4: // %cleanup
; CHECK-NEXT:    mov w0, w8
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB0_5:
; CHECK-NEXT:    mov w8, wzr
; CHECK-NEXT:    mov w0, w8
; CHECK-NEXT:    ret
entry:
  %cmp1 = icmp sgt i64 %n, 0
  br i1 %cmp1, label %for.body, label %cleanup

for.body:
  %iv = phi i64 [ %iv.next, %for.inc ], [ 0, %entry ]
  %accum = phi i32 [ %add, %for.inc ], [ 0, %entry ]
  %ptr = phi ptr [ %ptr.next, %for.inc ], [ %p, %entry ]
  %val = load i32, ptr %ptr, align 4
  %ptr.next = getelementptr inbounds nuw i8, ptr %ptr, i64 4
  %add = add i32 %accum, %val
  %cmp2 = icmp ult i32 %add, 0
  br i1 %cmp2, label %cleanup, label %for.inc

for.inc:
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, %n
  br i1 %exitcond, label %cleanup, label %for.body

cleanup:
  %ret = phi i32 [ 0, %entry ], [ 0, %for.body ], [ %add, %for.inc ]
  ret i32 %ret
}

define i32 @i32_initially_offset(ptr %p, i64 %n) {
; CHECK-LABEL: i32_initially_offset:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    cmp x1, #1
; CHECK-NEXT:    b.lt .LBB1_5
; CHECK-NEXT:  // %bb.1: // %for.body.preheader
; CHECK-NEXT:    mov w8, wzr
; CHECK-NEXT:  .LBB1_2: // %for.body
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    ldr w9, [x0], #4
; CHECK-NEXT:    add w8, w8, w9
; CHECK-NEXT:    cmp w8, #0
; CHECK-NEXT:    b.lo .LBB1_5
; CHECK-NEXT:  // %bb.3: // %for.cond
; CHECK-NEXT:    // in Loop: Header=BB1_2 Depth=1
; CHECK-NEXT:    subs x1, x1, #1
; CHECK-NEXT:    b.ne .LBB1_2
; CHECK-NEXT:  // %bb.4: // %cleanup
; CHECK-NEXT:    mov w0, w8
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB1_5:
; CHECK-NEXT:    mov w8, wzr
; CHECK-NEXT:    mov w0, w8
; CHECK-NEXT:    ret
entry:
  %cmp1 = icmp sgt i64 %n, 0
  br i1 %cmp1, label %for.body, label %cleanup

for.cond:
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, %n
  br i1 %exitcond, label %cleanup, label %for.body

for.body:
  %iv = phi i64 [ %iv.next, %for.cond ], [ 0, %entry ]
  %accum = phi i32 [ %add, %for.cond ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds nuw i32, ptr %p, i64 %iv
  %val = load i32, ptr %arrayidx, align 4
  %add = add i32 %accum, %val
  %cmp2 = icmp ult i32 %add, 0
  br i1 %cmp2, label %cleanup, label %for.cond

cleanup:
  %ret = phi i32 [ 0, %entry ], [ 0, %for.body ], [ %add, %for.cond ]
  ret i32 %ret
}

define float @float_initially_postidx(ptr %p, i64 %n) {
; CHECK-LABEL: float_initially_postidx:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    movi d0, #0000000000000000
; CHECK-NEXT:    cmp x1, #1
; CHECK-NEXT:    b.lt .LBB2_3
; CHECK-NEXT:  .LBB2_1: // %for.body
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    ldr s1, [x0], #4
; CHECK-NEXT:    fadd s0, s0, s1
; CHECK-NEXT:    fcmp s0, #0.0
; CHECK-NEXT:    b.mi .LBB2_4
; CHECK-NEXT:  // %bb.2: // %for.inc
; CHECK-NEXT:    // in Loop: Header=BB2_1 Depth=1
; CHECK-NEXT:    subs x1, x1, #1
; CHECK-NEXT:    b.ne .LBB2_1
; CHECK-NEXT:  .LBB2_3: // %cleanup
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB2_4:
; CHECK-NEXT:    movi d0, #0000000000000000
; CHECK-NEXT:    ret
entry:
  %cmp1 = icmp sgt i64 %n, 0
  br i1 %cmp1, label %for.body, label %cleanup

for.body:
  %iv = phi i64 [ %iv.next, %for.inc ], [ 0, %entry ]
  %accum = phi float [ %add, %for.inc ], [ 0.000000e+00, %entry ]
  %ptr = phi ptr [ %ptr.next, %for.inc ], [ %p, %entry ]
  %val = load float, ptr %ptr, align 4
  %ptr.next = getelementptr inbounds nuw i8, ptr %ptr, i64 4
  %add = fadd float %accum, %val
  %cmp2 = fcmp olt float %add, 0.000000e+00
  br i1 %cmp2, label %cleanup, label %for.inc

for.inc:
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, %n
  br i1 %exitcond, label %cleanup, label %for.body

cleanup:
  %ret = phi float [ 0.000000e+00, %entry ], [ 0.000000e+00, %for.body ], [ %add, %for.inc ]
  ret float %ret
}

define float @float_initially_offset(ptr %p, i64 %n) {
; CHECK-LABEL: float_initially_offset:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    movi d0, #0000000000000000
; CHECK-NEXT:    cmp x1, #1
; CHECK-NEXT:    b.lt .LBB3_3
; CHECK-NEXT:  .LBB3_1: // %for.body
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    ldr s1, [x0], #4
; CHECK-NEXT:    fadd s0, s0, s1
; CHECK-NEXT:    fcmp s0, #0.0
; CHECK-NEXT:    b.mi .LBB3_4
; CHECK-NEXT:  // %bb.2: // %for.cond
; CHECK-NEXT:    // in Loop: Header=BB3_1 Depth=1
; CHECK-NEXT:    subs x1, x1, #1
; CHECK-NEXT:    b.ne .LBB3_1
; CHECK-NEXT:  .LBB3_3: // %cleanup
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB3_4:
; CHECK-NEXT:    movi d0, #0000000000000000
; CHECK-NEXT:    ret
entry:
  %cmp1 = icmp sgt i64 %n, 0
  br i1 %cmp1, label %for.body, label %cleanup

for.cond:
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, %n
  br i1 %exitcond, label %cleanup, label %for.body

for.body:
  %iv = phi i64 [ %iv.next, %for.cond ], [ 0, %entry ]
  %accum = phi float [ %add, %for.cond ], [ 0.000000e+00, %entry ]
  %arrayidx = getelementptr inbounds nuw float, ptr %p, i64 %iv
  %val = load float, ptr %arrayidx, align 4
  %add = fadd float %accum, %val
  %cmp2 = fcmp olt float %add, 0.000000e+00
  br i1 %cmp2, label %cleanup, label %for.cond

cleanup:
  %ret = phi float [ 0.000000e+00, %entry ], [ 0.000000e+00, %for.body ], [ %add, %for.cond ]
  ret float %ret
}