llvm/test/Transforms/LoopVectorize/X86/replicate-uniform-call.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -p loop-vectorize -S %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"
target triple = "x86_64-unknown-linux-gnu"

; Test for https://github.com/llvm/llvm-project/issues/111040
define void @smax_call_uniform(ptr %dst, i64 %x) {
; CHECK-LABEL: define void @smax_call_uniform(
; CHECK-SAME: ptr [[DST:%.*]], i64 [[X:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[C:%.*]] = icmp ult i8 -68, -69
; CHECK-NEXT:    [[MUL:%.*]] = mul nuw nsw i64 [[X]], 0
; CHECK-NEXT:    br label %[[LOOP_HEADER:.*]]
; CHECK:       [[LOOP_HEADER]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[INDEX_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
; CHECK-NEXT:    br i1 [[C]], label %[[LOOP_LATCH]], label %[[ELSE:.*]]
; CHECK:       [[ELSE]]:
; CHECK-NEXT:    [[REM:%.*]] = urem i64 [[MUL]], [[X]]
; CHECK-NEXT:    [[SMAX:%.*]] = tail call i64 @llvm.smax.i64(i64 [[REM]], i64 0)
; CHECK-NEXT:    br label %[[LOOP_LATCH]]
; CHECK:       [[LOOP_LATCH]]:
; CHECK-NEXT:    [[PREDPHI7:%.*]] = phi i64 [ 1, %[[LOOP_HEADER]] ], [ [[SMAX]], %[[ELSE]] ]
; CHECK-NEXT:    [[TMP17:%.*]] = add i64 [[PREDPHI7]], 1
; CHECK-NEXT:    [[TMP19:%.*]] = getelementptr i64, ptr [[DST]], i64 [[TMP17]]
; CHECK-NEXT:    store i64 0, ptr [[TMP19]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1024
; CHECK-NEXT:    br i1 [[TMP20]], label %[[EXIT:.*]], label %[[LOOP_HEADER]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  %c = icmp ult i8 -68, -69
  %mul = mul nsw nuw i64 %x, 0
  br label %loop.header

loop.header:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
  br i1 %c, label %loop.latch, label %else

else:
  %rem = urem i64 %mul, %x
  %smax = tail call i64 @llvm.smax.i64(i64 %rem, i64 0)
  br label %loop.latch

loop.latch:
  %p = phi i64 [ 1, %loop.header ], [ %smax, %else ]
  %add = add i64 %p, 1
  %gep = getelementptr i64, ptr %dst, i64 %add
  store i64 0, ptr %gep, align 8
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, 1024
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}