llvm/llvm/test/Transforms/TypePromotion/AArch64/phi-zext-gep.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -mtriple=aarch64 -passes=typepromotion,verify -S %s -o - | FileCheck %s

target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"

define dso_local i32 @avoid_trunc_gep(ptr nocapture readonly %ip) {
; CHECK-LABEL: @avoid_trunc_gep(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TAG_0_IN8:%.*]] = load i8, ptr [[IP:%.*]], align 1
; CHECK-NEXT:    [[TMP0:%.*]] = zext i8 [[TAG_0_IN8]] to i32
; CHECK-NEXT:    [[CMP9:%.*]] = icmp ult i32 [[TMP0]], 100
; CHECK-NEXT:    br i1 [[CMP9]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[TAG_0_IN10:%.*]] = phi i32 [ [[TMP1:%.*]], [[FOR_BODY]] ], [ [[TMP0]], [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[TAG_0:%.*]] = zext i32 [[TAG_0_IN10]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[IP]], i64 [[TAG_0]]
; CHECK-NEXT:    [[TAG_0_IN:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[TMP1]] = zext i8 [[TAG_0_IN]] to i32
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[TMP1]], 100
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[TAG_0_IN_LCSSA:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP1]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[TAG_0_IN_LCSSA]]
;
entry:
  %tag.0.in8 = load i8, ptr %ip, align 1
  %cmp9 = icmp ult i8 %tag.0.in8, 100
  br i1 %cmp9, label %for.body.preheader, label %for.end

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %tag.0.in10 = phi i8 [ %tag.0.in, %for.body ], [ %tag.0.in8, %for.body.preheader ]
  %tag.0 = zext i8 %tag.0.in10 to i64
  %arrayidx = getelementptr inbounds i8, ptr %ip, i64 %tag.0
  %tag.0.in = load i8, ptr %arrayidx, align 1
  %cmp = icmp ult i8 %tag.0.in, 100
  br i1 %cmp, label %for.body, label %for.end.loopexit

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  %tag.0.in.lcssa = phi i8 [ %tag.0.in8, %entry ], [ %tag.0.in, %for.end.loopexit ]
  %conv3 = zext i8 %tag.0.in.lcssa to i32
  ret i32 %conv3
}