llvm/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 -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(i8* %foo) minsize {
; CHECK-LABEL: @test6a(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i8* [[FOO:%.*]], null
; CHECK-NEXT:    br i1 [[TOBOOL]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    tail call void @_ZdlPv(i8* [[FOO]]) #[[ATTR5:[0-9]+]]
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    ret void
;
entry:
  %tobool = icmp eq i8* %foo, null
  br i1 %tobool, label %if.end, label %if.then

if.then:                                          ; preds = %entry
  tail call void @_ZdlPv(i8* %foo) builtin
  br label %if.end

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

declare i8* @_ZnwmRKSt9nothrow_t(i64, i8*) nobuiltin
declare void @_ZdlPvRKSt9nothrow_t(i8*, i8*) nobuiltin
declare i32 @__gxx_personality_v0(...)
declare void @_ZN1AC2Ev(i8* %this)

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

.noexc.i:                                         ; preds = %entry
  unreachable

lpad.i:                                           ; preds = %entry
  %0 = landingpad { i8*, i32 } cleanup
  call void @_ZdlPvRKSt9nothrow_t(i8* %call.i, i8* %nt) builtin nounwind
  resume { i8*, i32 } %0
}

declare i8* @_Znwm(i64) nobuiltin
define i8* @_Znwj(i32 %n) nobuiltin {
; CHECK-LABEL: @_Znwj(
; CHECK-NEXT:    [[Z:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT:    [[M:%.*]] = call i8* @_Znwm(i64 [[Z]])
; CHECK-NEXT:    ret i8* [[M]]
;
  %z = zext i32 %n to i64
  %m = call i8* @_Znwm(i64 %z)
  ret i8* %m
}
declare i8* @_Znam(i64) nobuiltin
declare i8* @_Znaj(i32) nobuiltin
declare void @_ZdlPv(i8*) nobuiltin
declare void @_ZdaPv(i8*) nobuiltin

define linkonce void @_ZdlPvm(i8* %p, i64) nobuiltin {
; CHECK-LABEL: @_ZdlPvm(
; CHECK-NEXT:    call void @_ZdlPv(i8* [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(i8* %p)
  ret void
}
define linkonce void @_ZdlPvj(i8* %p, i32) nobuiltin {
; CHECK-LABEL: @_ZdlPvj(
; CHECK-NEXT:    call void @_ZdlPv(i8* [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(i8* %p)
  ret void
}
define linkonce void @_ZdaPvm(i8* %p, i64) nobuiltin {
; CHECK-LABEL: @_ZdaPvm(
; CHECK-NEXT:    call void @_ZdaPv(i8* [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdaPv(i8* %p)
  ret void
}
define linkonce void @_ZdaPvj(i8* %p, i32) nobuiltin {
; CHECK-LABEL: @_ZdaPvj(
; CHECK-NEXT:    call void @_ZdaPv(i8* [[P:%.*]])
; CHECK-NEXT:    ret void
;
  call void @_ZdaPv(i8* %p)
  ret void
}


; new(size_t, align_val_t)
declare i8* @_ZnwmSt11align_val_t(i64, i64) nobuiltin
declare i8* @_ZnwjSt11align_val_t(i32, i32) nobuiltin
; new[](size_t, align_val_t)
declare i8* @_ZnamSt11align_val_t(i64, i64) nobuiltin
declare i8* @_ZnajSt11align_val_t(i32, i32) nobuiltin
; new(size_t, align_val_t, nothrow)
declare i8* @_ZnwmSt11align_val_tRKSt9nothrow_t(i64, i64, i8*) nobuiltin
declare i8* @_ZnwjSt11align_val_tRKSt9nothrow_t(i32, i32, i8*) nobuiltin
; new[](size_t, align_val_t, nothrow)
declare i8* @_ZnamSt11align_val_tRKSt9nothrow_t(i64, i64, i8*) nobuiltin
declare i8* @_ZnajSt11align_val_tRKSt9nothrow_t(i32, i32, i8*) nobuiltin
; delete(void*, align_val_t)
declare void @_ZdlPvSt11align_val_t(i8*, i64) nobuiltin
; delete[](void*, align_val_t)
declare void @_ZdaPvSt11align_val_t(i8*, i64) nobuiltin
; delete(void*, align_val_t, nothrow)
declare void @_ZdlPvSt11align_val_tRKSt9nothrow_t(i8*, i64, i8*) nobuiltin
; delete[](void*, align_val_t, nothrow)
declare void @_ZdaPvSt11align_val_tRKSt9nothrow_t(i8*, i64, i8*) nobuiltin
; delete(void*, unsigned int, align_val_t)
declare void @_ZdlPvjSt11align_val_t(i8*, i32, i32) nobuiltin
; delete(void*, unsigned long, align_val_t)
declare void @_ZdlPvmSt11align_val_t(i8*, i64, i64) nobuiltin
; delete[](void*, unsigned int, align_val_t)
declare void @_ZdaPvjSt11align_val_t(i8*, i32, i32) nobuiltin
; delete[](void*, unsigned long, align_val_t)
declare void @_ZdaPvmSt11align_val_t(i8*, i64, i64) nobuiltin

declare void @llvm.assume(i1)

define void @test8() {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    ret void
;
  %nt = alloca i8
  %nw = call i8* @_Znwm(i64 32) builtin
  call void @_ZdlPv(i8* %nw) builtin
  %na = call i8* @_Znam(i64 32) builtin
  call void @_ZdaPv(i8* %na) builtin
  %nwm = call i8* @_Znwm(i64 32) builtin
  call void @_ZdlPvm(i8* %nwm, i64 32) builtin
  %nwj = call i8* @_Znwj(i32 32) builtin
  call void @_ZdlPvj(i8* %nwj, i32 32) builtin
  %nam = call i8* @_Znam(i64 32) builtin
  call void @_ZdaPvm(i8* %nam, i64 32) builtin
  %naj = call i8* @_Znaj(i32 32) builtin
  call void @_ZdaPvj(i8* %naj, i32 32) builtin
  %nwa = call i8* @_ZnwmSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdlPvSt11align_val_t(i8* %nwa, i64 8) builtin
  %naa = call i8* @_ZnamSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdaPvSt11align_val_t(i8* %naa, i64 8) builtin
  %nwja = call i8* @_ZnwjSt11align_val_t(i32 32, i32 8) builtin
  call void @_ZdlPvSt11align_val_t(i8* %nwja, i64 8) builtin
  %naja = call i8* @_ZnajSt11align_val_t(i32 32, i32 8) builtin
  call void @_ZdaPvSt11align_val_t(i8* %naja, i64 8) builtin
  %nwat = call i8* @_ZnwmSt11align_val_tRKSt9nothrow_t(i64 32, i64 8, i8* %nt) builtin
  call void @_ZdlPvSt11align_val_tRKSt9nothrow_t(i8* %nwat, i64 8, i8* %nt) builtin
  %naat = call i8* @_ZnamSt11align_val_tRKSt9nothrow_t(i64 32, i64 8, i8* %nt) builtin
  call void @_ZdaPvSt11align_val_tRKSt9nothrow_t(i8* %naat, i64 8, i8* %nt) builtin
  %nwjat = call i8* @_ZnwjSt11align_val_tRKSt9nothrow_t(i32 32, i32 8, i8* %nt) builtin
  call void @_ZdlPvSt11align_val_tRKSt9nothrow_t(i8* %nwjat, i64 8, i8* %nt) builtin
  %najat = call i8* @_ZnajSt11align_val_tRKSt9nothrow_t(i32 32, i32 8, i8* %nt) builtin
  call void @_ZdaPvSt11align_val_tRKSt9nothrow_t(i8* %najat, i64 8, i8* %nt) builtin
  %nwa2 = call i8* @_ZnwmSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdlPvmSt11align_val_t(i8* %nwa2, i64 32, i64 8) builtin
  %nwja2 = call i8* @_ZnwjSt11align_val_t(i32 32, i32 8) builtin
  call void @_ZdlPvjSt11align_val_t(i8* %nwa2, i32 32, i32 8) builtin
  %naa2 = call i8* @_ZnamSt11align_val_t(i64 32, i64 8) builtin
  call void @_ZdaPvmSt11align_val_t(i8* %naa2, i64 32, i64 8) builtin
  %naja2 = call i8* @_ZnajSt11align_val_t(i32 32, i32 8) builtin
  call void @_ZdaPvjSt11align_val_t(i8* %naja2, i32 32, i32 8) builtin

  ; Check that the alignment assume does not prevent the removal.
  %nwa3 = call i8* @_ZnwmSt11align_val_t(i64 32, i64 16) builtin
  call void @llvm.assume(i1 true) [ "align"(i8* %nwa3, i64 16) ]
  call void @_ZdlPvmSt11align_val_t(i8* %nwa3, i64 32, i64 16) builtin

  ret void
}

define void @test10()  {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    call void @_ZdlPv(i8* null)
; CHECK-NEXT:    ret void
;
  call void @_ZdlPv(i8* null)
  ret void
}

define void @test11() {
; CHECK-LABEL: @test11(
; CHECK-NEXT:    [[CALL:%.*]] = call dereferenceable(8) i8* @_Znwm(i64 8) #[[ATTR5]]
; CHECK-NEXT:    call void @_ZdlPv(i8* nonnull [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call i8* @_Znwm(i64 8) builtin
  call void @_ZdlPv(i8* %call)
  ret void
}

declare i8* @llvm.launder.invariant.group(i8*)
declare i8* @llvm.strip.invariant.group(i8*)

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