llvm/test/Transforms/CodeGenPrepare/X86/sink-addr-reuse.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -p 'require<profile-summary>,codegenprepare' -cgpp-huge-func=0 < %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-grtev4-linux-gnu"

declare void @g(ptr)

; %load and %load5 use the same address, %load5 is optimized first, %load is
; optimized later and reuse the same address computation instruction. We must
; make sure not to generate use before def error.

define void @f(ptr %arg) {
; CHECK-LABEL: define void @f(
; CHECK-SAME: ptr [[ARG:%.*]]) {
; CHECK-NEXT:  [[BB:.*:]]
; CHECK-NEXT:    [[GETELEMENTPTR:%.*]] = getelementptr i8, ptr [[ARG]], i64 -64
; CHECK-NEXT:    call void @g(ptr [[GETELEMENTPTR]])
; CHECK-NEXT:    [[SUNKADDR1:%.*]] = getelementptr i8, ptr [[ARG]], i64 -64
; CHECK-NEXT:    [[LOAD:%.*]] = load ptr, ptr [[SUNKADDR1]], align 8
; CHECK-NEXT:    [[SUNKADDR:%.*]] = getelementptr i8, ptr [[ARG]], i64 -56
; CHECK-NEXT:    [[LOAD4:%.*]] = load i32, ptr [[SUNKADDR]], align 8
; CHECK-NEXT:    [[LOAD5:%.*]] = load ptr, ptr [[SUNKADDR1]], align 8
; CHECK-NEXT:    [[TMP0:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 1, i32 0)
; CHECK-NEXT:    [[MATH:%.*]] = extractvalue { i32, i1 } [[TMP0]], 0
; CHECK-NEXT:    ret void
;
bb:
  %getelementptr = getelementptr i8, ptr %arg, i64 -64
  %getelementptr1 = getelementptr i8, ptr %arg, i64 -56
  call void @g(ptr %getelementptr)
  br label %bb3

bb3:
  %load = load ptr, ptr %getelementptr, align 8
  %load4 = load i32, ptr %getelementptr1, align 8
  %load5 = load ptr, ptr %getelementptr, align 8
  %add = add i32 1, 0
  %icmp = icmp eq i32 %add, 0
  br i1 %icmp, label %bb7, label %bb7

bb7:
  ret void
}