llvm/test/Transforms/LowerConstantIntrinsics/objectsize_basic.ll

; RUN: opt -lower-constant-intrinsics -S < %s | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin10.0.0"

declare i64 @llvm.objectsize.i64(i8*, i1, i1, i1) nounwind readonly
declare i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)*, i1, i1, i1) nounwind readonly
declare void @llvm.trap() nounwind

; CHECK-LABEL: @test1(
; objectsize should fold to a constant, which causes the branch to fold to an
; uncond branch.
define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
entry:
  %0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false, i1 false, i1 false)
  %1 = icmp ugt i64 %0, 3
  br i1 %1, label %T, label %trap

; CHECK: entry:
; CHECK-NOT: label %trap

trap:                                             ; preds = %0, %entry
  tail call void @llvm.trap() noreturn nounwind
  unreachable

T:
; CHECK: ret i32 4
  ret i32 4
}

; CHECK-LABEL: @test_objectsize_null_flag(
define i64 @test_objectsize_null_flag(i8* %ptr) {
entry:
  ; CHECK: ret i64 -1
  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 false, i1 true, i1 false)
  ret i64 %0
}

; CHECK-LABEL: @test_objectsize_null_flag_min(
define i64 @test_objectsize_null_flag_min(i8* %ptr) {
entry:
  ; CHECK: ret i64 0
  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 true, i1 true, i1 false)
  ret i64 %0
}

; Test foldable null pointers because we evaluate them with non-exact modes in
; CodeGenPrepare.
; CHECK-LABEL: @test_objectsize_null_flag_noas0(
define i64 @test_objectsize_null_flag_noas0() {
entry:
  ; CHECK: ret i64 -1
  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
                                               i1 true, i1 false)
  ret i64 %0
}

; CHECK-LABEL: @test_objectsize_null_flag_min_noas0(
define i64 @test_objectsize_null_flag_min_noas0() {
entry:
  ; CHECK: ret i64 0
  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
                                               i1 true, i1 false)
  ret i64 %0
}

; CHECK-LABEL: @test_objectsize_null_known_flag_noas0
define i64 @test_objectsize_null_known_flag_noas0() {
entry:
  ; CHECK: ret i64 -1
  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
                                               i1 false, i1 false)
  ret i64 %0
}

; CHECK-LABEL: @test_objectsize_null_known_flag_min_noas0
define i64 @test_objectsize_null_known_flag_min_noas0() {
entry:
  ; CHECK: ret i64 0
  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
                                               i1 false, i1 false)
  ret i64 %0
}

; CHECK-LABEL: @test_objectsize_byval_arg(
; CHECK: ret i64 42
define i64 @test_objectsize_byval_arg([42 x i8]* byval([42 x i8]) %ptr) {
  %cast = bitcast [42 x i8]* %ptr to i8*
  %size = tail call i64 @llvm.objectsize.i64(i8* %cast, i1 true, i1 false, i1 false)
  ret i64 %size
}

; CHECK-LABEL: @test_objectsize_byref_arg(
; CHECK: ret i64 42
define i64 @test_objectsize_byref_arg([42 x i8]* byref([42 x i8]) %ptr) {
  %cast = bitcast [42 x i8]* %ptr to i8*
  %size = tail call i64 @llvm.objectsize.i64(i8* %cast, i1 true, i1 false, i1 false)
  ret i64 %size
}

; https://llvm.org/PR50023
; The alloca operand type may not match pointer type size.

define i64 @vla_pointer_size_mismatch(i42 %x) {
; CHECK-LABEL: @vla_pointer_size_mismatch(
; CHECK-NEXT:    [[TMP1:%.*]] = zext i42 [[X:%.*]] to i64
; CHECK-NEXT:    [[TMP2:%.*]] = mul i64 1, [[TMP1]]
; CHECK-NEXT:    [[A:%.*]] = alloca i8, i42 [[X]], align 1
; CHECK-NEXT:    [[G1:%.*]] = getelementptr i8, i8* [[A]], i8 17
; CHECK-NEXT:    [[TMP3:%.*]] = sub i64 [[TMP2]], 17
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ult i64 [[TMP2]], 17
; CHECK-NEXT:    [[TMP5:%.*]] = select i1 [[TMP4]], i64 0, i64 [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ne i64 [[TMP5]], -1
; CHECK-NEXT:    call void @llvm.assume(i1 [[TMP6]])
; CHECK-NEXT:    ret i64 [[TMP5]]
;
  %A = alloca i8, i42 %x, align 1
  %G1 = getelementptr i8, i8* %A, i8 17
  %objsize = call i64 @llvm.objectsize.i64(i8* %G1, i1 false, i1 true, i1 true)
  ret i64 %objsize
}