test/Transforms/InstCombine/new-delete-itanium.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mtriple x86_64--linux -passes=instcombine -S | FileCheck %s
; REQUIRES: x86-registered-target
; PR1201

; 'if (p) delete p;' cannot result in a call to 'operator delete(0)'.
define void @test6a(ptr %foo) minsize {
; CHECK-LABEL: @test6a(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq ptr [[FOO:%.*]], null
; CHECK-NEXT:    br i1 [[TOBOOL]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    tail call void @_ZdlPv(ptr [[FOO]]) #[[ATTR5:[0-9]+]]
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    ret void
;
entry:
  %tobool = icmp eq ptr %foo, null
  br i1 %tobool, label %if.end, label %if.then

if.then:                                          ; preds = %entry
  tail call void @_ZdlPv(ptr %foo) builtin
  br label %if.end

if.end:                                           ; preds = %entry, %if.then
  ret void
}

declare ptr @_ZnwmRKSt9nothrow_t(i64, ptr) nobuiltin
declare void @_ZdlPvRKSt9nothrow_t(ptr, ptr) nobuiltin
declare i32 @__gxx_personality_v0(...)
declare void @_ZN1AC2Ev(ptr %this)

define void @test7() personality ptr @__gxx_personality_v0 {
; CHECK-LABEL: @test7(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    invoke void @_ZN1AC2Ev(ptr undef)
; CHECK-NEXT:    to label [[DOTNOEXC_I:%.*]] unwind label [[LPAD_I:%.*]]
; CHECK:       .noexc.i:
; CHECK-NEXT:    unreachable
; CHECK:       lpad.i:
; CHECK-NEXT:    [[TMP0:%.*]] = landingpad { ptr, i32 }
; CHECK-NEXT:    cleanup
; CHECK-NEXT:    resume { ptr, i32 } [[TMP0]]
;
entry:
  %nt = alloca i8
  %call.i = tail call ptr @_ZnwmRKSt9nothrow_t(i64 1, ptr %nt) builtin nounwind
  invoke void @_ZN1AC2Ev(ptr undef)
  to label %.noexc.i unwind label %lpad.i

.noexc.i:                                         ; preds = %entry
  unreachable

lpad.i:                                           ; preds = %entry
  %0 = landingpad { ptr, i32 } cleanup
  call void @_ZdlPvRKSt9nothrow_t(ptr %call.i, ptr %nt) builtin nounwind
  resume { ptr, i32 } %0
}

declare ptr @_Znwm(i64) nobuiltin
define ptr @_Znwj(i32 %n) nobuiltin {
; CHECK-LABEL: @_Znwj(
; CHECK-NEXT:    [[Z:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT:    [[M:%.*]] = call ptr @_Znwm(i64 [[Z]])
; CHECK-NEXT:    ret ptr [[M]]
;
  %z = zext i32 %n to i64
  %m = call ptr @_Znwm(i64 %z)
  ret ptr %m
}
declare ptr @_Znam(i64) nobuiltin
declare ptr @_Znaj(i32) nobuiltin
declare void @_ZdlPv(ptr) nobuiltin
declare void @_ZdaPv(ptr) nobuiltin

define linkonce void @_ZdlPvm(ptr %p, i64) nobuiltin {
; CHECK-LABEL: @_ZdlPvm(
; CHECK-NEXT:    call void @_ZdlPv(ptr [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(ptr %p)
  ret void
}
define linkonce void @_ZdlPvj(ptr %p, i32) nobuiltin {
; CHECK-LABEL: @_ZdlPvj(
; CHECK-NEXT:    call void @_ZdlPv(ptr [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(ptr %p)
  ret void
}
define linkonce void @_ZdaPvm(ptr %p, i64) nobuiltin {
; CHECK-LABEL: @_ZdaPvm(
; CHECK-NEXT:    call void @_ZdaPv(ptr [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdaPv(ptr %p)
  ret void
}
define linkonce void @_ZdaPvj(ptr %p, i32) nobuiltin {
; CHECK-LABEL: @_ZdaPvj(
; CHECK-NEXT:    call void @_ZdaPv(ptr [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdaPv(ptr %p)
  ret void
}


; new(size_t, align_val_t)
declare ptr @_ZnwmSt11align_val_t(i64, i64) nobuiltin
; new[](size_t, align_val_t)
declare ptr @_ZnamSt11align_val_t(i64, i64) nobuiltin
; new(size_t, align_val_t, nothrow)
declare ptr @_ZnwmSt11align_val_tRKSt9nothrow_t(i64, i64, ptr) nobuiltin
; new[](size_t, align_val_t, nothrow)
declare ptr @_ZnamSt11align_val_tRKSt9nothrow_t(i64, i64, ptr) nobuiltin
; delete(ptr, align_val_t)
declare void @_ZdlPvSt11align_val_t(ptr, i64) nobuiltin
; delete[](ptr, align_val_t)
declare void @_ZdaPvSt11align_val_t(ptr, i64) nobuiltin
; delete(ptr, align_val_t, nothrow)
declare void @_ZdlPvSt11align_val_tRKSt9nothrow_t(ptr, i64, ptr) nobuiltin
; delete[](ptr, align_val_t, nothrow)
declare void @_ZdaPvSt11align_val_tRKSt9nothrow_t(ptr, i64, ptr) nobuiltin
; delete(ptr, unsigned long, align_val_t)
declare void @_ZdlPvmSt11align_val_t(ptr, i64, i64) nobuiltin
; delete[](ptr, unsigned long, align_val_t)
declare void @_ZdaPvmSt11align_val_t(ptr, i64, i64) nobuiltin

declare void @llvm.assume(i1)

define void @test8() {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    ret void
;
  %nt = alloca i8
  %nw = call ptr @_Znwm(i64 32) builtin
  call void @_ZdlPv(ptr %nw) builtin
  %na = call ptr @_Znam(i64 32) builtin
  call void @_ZdaPv(ptr %na) builtin
  %nwm = call ptr @_Znwm(i64 32) builtin
  call void @_ZdlPvm(ptr %nwm, i64 32) builtin
  %nam = call ptr @_Znam(i64 32) builtin
  call void @_ZdaPvm(ptr %nam, i64 32) builtin
  %nwa = call ptr @_ZnwmSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdlPvSt11align_val_t(ptr %nwa, i64 8) builtin
  %naa = call ptr @_ZnamSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdaPvSt11align_val_t(ptr %naa, i64 8) builtin
  %nwat = call ptr @_ZnwmSt11align_val_tRKSt9nothrow_t(i64 32, i64 8, ptr %nt) builtin
  call void @_ZdlPvSt11align_val_tRKSt9nothrow_t(ptr %nwat, i64 8, ptr %nt) builtin
  %naat = call ptr @_ZnamSt11align_val_tRKSt9nothrow_t(i64 32, i64 8, ptr %nt) builtin
  call void @_ZdaPvSt11align_val_tRKSt9nothrow_t(ptr %naat, i64 8, ptr %nt) builtin
  %nwa2 = call ptr @_ZnwmSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdlPvmSt11align_val_t(ptr %nwa2, i64 32, i64 8) builtin
  %naa2 = call ptr @_ZnamSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdaPvmSt11align_val_t(ptr %naa2, i64 32, i64 8) builtin

  ; Check that the alignment assume does not prevent the removal.
  %nwa3 = call ptr @_ZnwmSt11align_val_t(i64 32, i64 16) builtin
  call void @llvm.assume(i1 true) [ "align"(ptr %nwa3, i64 16) ]
  call void @_ZdlPvmSt11align_val_t(ptr %nwa3, i64 32, i64 16) builtin

  ret void
}

define void @test10()  {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    call void @_ZdlPv(ptr null)
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(ptr null)
  ret void
}

define void @test11() {
; CHECK-LABEL: @test11(
; CHECK-NEXT:    [[CALL:%.*]] = call dereferenceable_or_null(8) ptr @_Znwm(i64 8) #[[ATTR5]]
; CHECK-NEXT:    call void @_ZdlPv(ptr [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call ptr @_Znwm(i64 8) builtin
  call void @_ZdlPv(ptr %call)
  ret void
}

declare ptr @llvm.launder.invariant.group(ptr)
declare ptr @llvm.strip.invariant.group(ptr)

define void @test17() {
; CHECK-LABEL: @test17(
; CHECK-NEXT:    ret void
;
  %nw1 = call ptr @_Znwm(i64 32) builtin
  %nw2 = call ptr @llvm.launder.invariant.group(ptr %nw1)
  %nw3 = call ptr @llvm.strip.invariant.group(ptr %nw2)
  store i8 1, ptr %nw3
  call void @_ZdlPv(ptr %nw2) builtin
  ret void
}