llvm/test/Transforms/LowerConstantIntrinsics/builtin-object-size-phi.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=lower-constant-intrinsics  -S < %s | FileCheck %s


target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare dso_local noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr allocsize(0)
declare i64 @llvm.objectsize.i64.p0(ptr, i1 immarg, i1 immarg, i1 immarg)

@buffer = dso_local global [4 x i8] zeroinitializer, align 1

define dso_local i64 @pick_max(i32 noundef %n) local_unnamed_addr {
; CHECK-LABEL: @pick_max(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[COND]], label [[IF_ELSE:%.*]], label [[IF_END:%.*]]
; CHECK:       if.else:
; CHECK-NEXT:    [[MALLOCED:%.*]] = call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8)
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    [[P:%.*]] = phi ptr [ [[MALLOCED]], [[IF_ELSE]] ], [ @buffer, [[ENTRY:%.*]] ]
; CHECK-NEXT:    ret i64 8
;
entry:
  %cond = icmp eq i32 %n, 0
  br i1 %cond, label %if.else, label %if.end

if.else:
  %malloced = call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8)
  br label %if.end

if.end:
  %p = phi ptr [ %malloced, %if.else ], [ @buffer, %entry ]
  %size = call i64 @llvm.objectsize.i64.p0(ptr %p, i1 false, i1 true, i1 false)
  ret i64 %size
}

define dso_local i64 @pick_min(i32 noundef %n) local_unnamed_addr {
; CHECK-LABEL: @pick_min(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[COND]], label [[IF_ELSE:%.*]], label [[IF_END:%.*]]
; CHECK:       if.else:
; CHECK-NEXT:    [[MALLOCED:%.*]] = call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8)
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    [[P:%.*]] = phi ptr [ [[MALLOCED]], [[IF_ELSE]] ], [ @buffer, [[ENTRY:%.*]] ]
; CHECK-NEXT:    ret i64 4
;
entry:
  %cond = icmp eq i32 %n, 0
  br i1 %cond, label %if.else, label %if.end

if.else:
  %malloced = call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8)
  br label %if.end

if.end:
  %p = phi ptr [ %malloced, %if.else ], [ @buffer, %entry ]
  %size = call i64 @llvm.objectsize.i64.p0(ptr %p, i1 true, i1 true, i1 false)
  ret i64 %size
}