llvm/test/CodeGen/X86/GlobalISel/pr49087.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -o - -global-isel -global-isel-abort=1 < %s 2>&1 | FileCheck %s

define i32 @test_01(ptr %p, i64 %len, i32 %x) {
; CHECK-LABEL: test_01:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    movl $1, %eax
; CHECK-NEXT:    .p2align 4
; CHECK-NEXT:  .LBB0_1: # %loop
; CHECK-NEXT:    # =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    subq %rax, %rsi
; CHECK-NEXT:    setb %cl
; CHECK-NEXT:    testb $1, %cl
; CHECK-NEXT:    jne .LBB0_4
; CHECK-NEXT:  # %bb.2: # %backedge
; CHECK-NEXT:    # in Loop: Header=BB0_1 Depth=1
; CHECK-NEXT:    imulq $4, %rsi, %rcx
; CHECK-NEXT:    addq %rdi, %rcx
; CHECK-NEXT:    cmpl %edx, (%rcx)
; CHECK-NEXT:    sete %cl
; CHECK-NEXT:    testb $1, %cl
; CHECK-NEXT:    je .LBB0_1
; CHECK-NEXT:  # %bb.3: # %failure
; CHECK-NEXT:  .LBB0_4: # %exit
; CHECK-NEXT:    movl $-1, %eax
; CHECK-NEXT:    retq

entry:
  %scevgep = getelementptr i32, ptr %p, i64 -1
  br label %loop

loop:                                             ; preds = %backedge, %entry
  %iv = phi i64 [ %iv.next, %backedge ], [ %len, %entry ]
  %iv.next = add i64 %iv, -1
  %cond_1 = icmp eq i64 %iv, 0
  br i1 %cond_1, label %exit, label %backedge

backedge:                                         ; preds = %loop
  %scevgep1 = getelementptr i32, ptr %scevgep, i64 %iv
  %loaded = load atomic i32, ptr %scevgep1 unordered, align 4
  %cond_2 = icmp eq i32 %loaded, %x
  br i1 %cond_2, label %failure, label %loop

exit:                                             ; preds = %loop
  ret i32 -1

failure:
  unreachable
}