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LowerTypeTests: Give imported symbols a type with size 0 so that they are not assumed not to alias.

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It is possible for both a base and a derived class to be satisfied
with a unique vtable. If a program contains casts of the same pointer
to both of those types, the CFI checks will be lowered to this
(with ThinLTO):

if (p != &__typeid_base_global_addr)
  trap();
if (p != &__typeid_derived_global_addr)
  trap();

The optimizer may then use the first condition combined
with the assumption that __typeid_base_global_addr and
__typeid_derived_global_addr may not alias to optimize away the second
comparison, resulting in an unconditional trap.

This patch fixes the bug by giving imported globals the type [0 x i8]*,
which prevents the optimizer from assuming that they do not alias.

Differential Revision: https://reviews.llvm.org/D38873

llvm-svn: 315753
This commit is contained in:
Peter Collingbourne 2017-10-13 21:02:16 +00:00
parent 0209a3929b
commit e0db0dbafd
3 changed files with 68 additions and 64 deletions
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8
lib/Transforms/IPO/LowerTypeTests.cpp
View File

@ -259,6 +259,7 @@ class LowerTypeTestsModule {
IntegerType *Int1Ty = Type::getInt1Ty(M.getContext());
IntegerType *Int8Ty = Type::getInt8Ty(M.getContext());
PointerType *Int8PtrTy = Type::getInt8PtrTy(M.getContext());
ArrayType *Int8Arr0Ty = ArrayType::get(Type::getInt8Ty(M.getContext()), 0);
IntegerType *Int32Ty = Type::getInt32Ty(M.getContext());
PointerType *Int32PtrTy = PointerType::getUnqual(Int32Ty);
IntegerType *Int64Ty = Type::getInt64Ty(M.getContext());
@ -803,10 +804,13 @@ LowerTypeTestsModule::importTypeId(StringRef TypeId) {
TIL.TheKind = TTRes.TheKind;
auto ImportGlobal = [&](StringRef Name) {
Constant *C =
M.getOrInsertGlobal(("__typeid_" + TypeId + "_" + Name).str(), Int8Ty);
// Give the global a type of length 0 so that it is not assumed not to alias
// with any other global.
Constant *C = M.getOrInsertGlobal(("__typeid_" + TypeId + "_" + Name).str(),
Int8Arr0Ty);
if (auto *GV = dyn_cast<GlobalVariable>(C))
GV->setVisibility(GlobalValue::HiddenVisibility);
C = ConstantExpr::getBitCast(C, Int8PtrTy);
return C;
};

112
test/Transforms/LowerTypeTests/import.ll
View File

@ -5,42 +5,42 @@ target datalayout = "e-p:64:64"
declare i1 @llvm.type.test(i8* %ptr, metadata %bitset) nounwind readnone
; CHECK-DAG: @__typeid_single_global_addr = external hidden global i8
; CHECK-DAG: @__typeid_inline6_global_addr = external hidden global i8
; X86-DAG: @__typeid_inline6_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_inline6_size_m1 = external hidden global i8, !absolute_symbol !1
; X86-DAG: @__typeid_inline6_inline_bits = external hidden global i8, !absolute_symbol !2
; CHECK-DAG: @__typeid_inline5_global_addr = external hidden global i8
; X86-DAG: @__typeid_inline5_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_inline5_size_m1 = external hidden global i8, !absolute_symbol !3
; X86-DAG: @__typeid_inline5_inline_bits = external hidden global i8, !absolute_symbol !4
; CHECK-DAG: @__typeid_bytearray32_global_addr = external hidden global i8
; X86-DAG: @__typeid_bytearray32_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_bytearray32_size_m1 = external hidden global i8, !absolute_symbol !4
; CHECK-DAG: @__typeid_bytearray32_byte_array = external hidden global i8
; X86-DAG: @__typeid_bytearray32_bit_mask = external hidden global i8, !absolute_symbol !0
; CHECK-DAG: @__typeid_bytearray7_global_addr = external hidden global i8
; X86-DAG: @__typeid_bytearray7_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_bytearray7_size_m1 = external hidden global i8, !absolute_symbol !5
; CHECK-DAG: @__typeid_bytearray7_byte_array = external hidden global i8
; X86-DAG: @__typeid_bytearray7_bit_mask = external hidden global i8, !absolute_symbol !0
; CHECK-DAG: @__typeid_allones32_global_addr = external hidden global i8
; X86-DAG: @__typeid_allones32_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_allones32_size_m1 = external hidden global i8, !absolute_symbol !4
; CHECK-DAG: @__typeid_allones7_global_addr = external hidden global i8
; X86-DAG: @__typeid_allones7_align = external hidden global i8, !absolute_symbol !0
; X86-DAG: @__typeid_allones7_size_m1 = external hidden global i8, !absolute_symbol !5
; CHECK-DAG: @__typeid_single_global_addr = external hidden global [0 x i8]
; CHECK-DAG: @__typeid_inline6_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_inline6_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_inline6_size_m1 = external hidden global [0 x i8], !absolute_symbol !1
; X86-DAG: @__typeid_inline6_inline_bits = external hidden global [0 x i8], !absolute_symbol !2
; CHECK-DAG: @__typeid_inline5_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_inline5_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_inline5_size_m1 = external hidden global [0 x i8], !absolute_symbol !3
; X86-DAG: @__typeid_inline5_inline_bits = external hidden global [0 x i8], !absolute_symbol !4
; CHECK-DAG: @__typeid_bytearray32_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_bytearray32_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_bytearray32_size_m1 = external hidden global [0 x i8], !absolute_symbol !4
; CHECK-DAG: @__typeid_bytearray32_byte_array = external hidden global [0 x i8]
; X86-DAG: @__typeid_bytearray32_bit_mask = external hidden global [0 x i8], !absolute_symbol !0
; CHECK-DAG: @__typeid_bytearray7_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_bytearray7_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_bytearray7_size_m1 = external hidden global [0 x i8], !absolute_symbol !5
; CHECK-DAG: @__typeid_bytearray7_byte_array = external hidden global [0 x i8]
; X86-DAG: @__typeid_bytearray7_bit_mask = external hidden global [0 x i8], !absolute_symbol !0
; CHECK-DAG: @__typeid_allones32_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_allones32_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_allones32_size_m1 = external hidden global [0 x i8], !absolute_symbol !4
; CHECK-DAG: @__typeid_allones7_global_addr = external hidden global [0 x i8]
; X86-DAG: @__typeid_allones7_align = external hidden global [0 x i8], !absolute_symbol !0
; X86-DAG: @__typeid_allones7_size_m1 = external hidden global [0 x i8], !absolute_symbol !5
; CHECK: define i1 @allones7(i8* [[p:%.*]])
define i1 @allones7(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_allones7_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_allones7_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_allones7_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_allones7_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_allones7_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_allones7_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 1
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 63
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_allones7_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_allones7_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 42
; CHECK-NEXT: ret i1 [[ule]]
%x = call i1 @llvm.type.test(i8* %p, metadata !"allones7")
@ -50,13 +50,13 @@ define i1 @allones7(i8* %p) {
; CHECK: define i1 @allones32(i8* [[p:%.*]])
define i1 @allones32(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_allones32_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_allones32_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_allones32_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_allones32_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_allones32_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_allones32_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 2
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 62
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_allones32_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_allones32_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 12345
; CHECK-NEXT: ret i1 [[ule]]
%x = call i1 @llvm.type.test(i8* %p, metadata !"allones32")
@ -66,20 +66,20 @@ define i1 @allones32(i8* %p) {
; CHECK: define i1 @bytearray7(i8* [[p:%.*]])
define i1 @bytearray7(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_bytearray7_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_bytearray7_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_bytearray7_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_bytearray7_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_bytearray7_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_bytearray7_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 3
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 61
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_bytearray7_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_bytearray7_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 43
; CHECK-NEXT: br i1 [[ule]], label %[[t:.*]], label %[[f:.*]]
; CHECK: [[t]]:
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* @__typeid_bytearray7_byte_array, i64 [[or]]
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* getelementptr inbounds ([0 x i8], [0 x i8]* @__typeid_bytearray7_byte_array, i32 0, i32 0), i64 [[or]]
; CHECK-NEXT: [[load:%.*]] = load i8, i8* [[gep]]
; X86-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint (i8* @__typeid_bytearray7_bit_mask to i8)
; X86-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint ([0 x i8]* @__typeid_bytearray7_bit_mask to i8)
; ARM-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint (i8* inttoptr (i64 64 to i8*) to i8)
; CHECK-NEXT: [[ne:%.*]] = icmp ne i8 [[and]], 0
; CHECK-NEXT: br label %[[f]]
@ -94,20 +94,20 @@ define i1 @bytearray7(i8* %p) {
; CHECK: define i1 @bytearray32(i8* [[p:%.*]])
define i1 @bytearray32(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_bytearray32_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_bytearray32_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_bytearray32_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_bytearray32_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_bytearray32_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_bytearray32_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 4
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 60
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_bytearray32_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_bytearray32_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 12346
; CHECK-NEXT: br i1 [[ule]], label %[[t:.*]], label %[[f:.*]]
; CHECK: [[t]]:
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* @__typeid_bytearray32_byte_array, i64 [[or]]
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* getelementptr inbounds ([0 x i8], [0 x i8]* @__typeid_bytearray32_byte_array, i32 0, i32 0), i64 [[or]]
; CHECK-NEXT: [[load:%.*]] = load i8, i8* [[gep]]
; X86-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint (i8* @__typeid_bytearray32_bit_mask to i8)
; X86-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint ([0 x i8]* @__typeid_bytearray32_bit_mask to i8)
; ARM-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint (i8* inttoptr (i64 128 to i8*) to i8)
; CHECK-NEXT: [[ne:%.*]] = icmp ne i8 [[and]], 0
; CHECK-NEXT: br label %[[f]]
@ -122,13 +122,13 @@ define i1 @bytearray32(i8* %p) {
; CHECK: define i1 @inline5(i8* [[p:%.*]])
define i1 @inline5(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_inline5_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_inline5_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_inline5_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_inline5_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_inline5_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_inline5_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 5
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 59
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_inline5_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_inline5_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 31
; CHECK-NEXT: br i1 [[ule]], label %[[t:.*]], label %[[f:.*]]
@ -136,7 +136,7 @@ define i1 @inline5(i8* %p) {
; CHECK-NEXT: [[trunc:%.*]] = trunc i64 [[or]] to i32
; CHECK-NEXT: [[and:%.*]] = and i32 [[trunc]], 31
; CHECK-NEXT: [[shl2:%.*]] = shl i32 1, [[and]]
; X86-NEXT: [[and2:%.*]] = and i32 ptrtoint (i8* @__typeid_inline5_inline_bits to i32), [[shl2]]
; X86-NEXT: [[and2:%.*]] = and i32 ptrtoint ([0 x i8]* @__typeid_inline5_inline_bits to i32), [[shl2]]
; ARM-NEXT: [[and2:%.*]] = and i32 123, [[shl2]]
; CHECK-NEXT: [[ne:%.*]] = icmp ne i32 [[and2]], 0
; CHECK-NEXT: br label %[[f]]
@ -151,20 +151,20 @@ define i1 @inline5(i8* %p) {
; CHECK: define i1 @inline6(i8* [[p:%.*]])
define i1 @inline6(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_inline6_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_inline6_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_inline6_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_inline6_global_addr to i64)
; X86-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_inline6_align to i8) to i64)
; X86-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_inline6_align to i8)) to i64)
; ARM-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], 6
; ARM-NEXT: [[shl:%.*]] = shl i64 [[sub]], 58
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_inline6_size_m1 to i64)
; X86-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_inline6_size_m1 to i64)
; ARM-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], 63
; CHECK-NEXT: br i1 [[ule]], label %[[t:.*]], label %[[f:.*]]
; CHECK: [[t]]:
; CHECK-NEXT: [[and:%.*]] = and i64 [[or]], 63
; CHECK-NEXT: [[shl2:%.*]] = shl i64 1, [[and]]
; X86-NEXT: [[and2:%.*]] = and i64 ptrtoint (i8* @__typeid_inline6_inline_bits to i64), [[shl2]]
; X86-NEXT: [[and2:%.*]] = and i64 ptrtoint ([0 x i8]* @__typeid_inline6_inline_bits to i64), [[shl2]]
; ARM-NEXT: [[and2:%.*]] = and i64 1000000000000, [[shl2]]
; CHECK-NEXT: [[ne:%.*]] = icmp ne i64 [[and2]], 0
; CHECK-NEXT: br label %[[f]]
@ -179,7 +179,7 @@ define i1 @inline6(i8* %p) {
; CHECK: define i1 @single(i8* [[p:%.*]])
define i1 @single(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[eq:%.*]] = icmp eq i64 [[pi]], ptrtoint (i8* @__typeid_single_global_addr to i64)
; CHECK-NEXT: [[eq:%.*]] = icmp eq i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_single_global_addr to i64)
; CHECK-NEXT: ret i1 [[eq]]
%x = call i1 @llvm.type.test(i8* %p, metadata !"single")
ret i1 %x

12
test/Transforms/LowerTypeTests/simplify.ll
View File

@ -8,17 +8,17 @@ declare i1 @llvm.type.test(i8* %ptr, metadata %bitset) nounwind readnone
; CHECK: define i1 @bytearray7(i8* [[p:%.*]])
define i1 @bytearray7(i8* %p) {
; CHECK-NEXT: [[pi:%.*]] = ptrtoint i8* [[p]] to i64
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint (i8* @__typeid_bytearray7_global_addr to i64)
; CHECK-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint (i8* @__typeid_bytearray7_align to i8) to i64)
; CHECK-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint (i8* @__typeid_bytearray7_align to i8)) to i64)
; CHECK-NEXT: [[sub:%.*]] = sub i64 [[pi]], ptrtoint ([0 x i8]* @__typeid_bytearray7_global_addr to i64)
; CHECK-NEXT: [[lshr:%.*]] = lshr i64 [[sub]], zext (i8 ptrtoint ([0 x i8]* @__typeid_bytearray7_align to i8) to i64)
; CHECK-NEXT: [[shl:%.*]] = shl i64 [[sub]], zext (i8 sub (i8 64, i8 ptrtoint ([0 x i8]* @__typeid_bytearray7_align to i8)) to i64)
; CHECK-NEXT: [[or:%.*]] = or i64 [[lshr]], [[shl]]
; CHECK-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint (i8* @__typeid_bytearray7_size_m1 to i64)
; CHECK-NEXT: [[ule:%.*]] = icmp ule i64 [[or]], ptrtoint ([0 x i8]* @__typeid_bytearray7_size_m1 to i64)
; CHECK-NEXT: br i1 [[ule]], label %[[t1:.*]], label %[[f:.*]]
; CHECK: [[t1]]:
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* @__typeid_bytearray7_byte_array, i64 [[or]]
; CHECK-NEXT: [[gep:%.*]] = getelementptr i8, i8* getelementptr inbounds ([0 x i8], [0 x i8]* @__typeid_bytearray7_byte_array, i32 0, i32 0), i64 [[or]]
; CHECK-NEXT: [[load:%.*]] = load i8, i8* [[gep]]
; CHECK-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint (i8* @__typeid_bytearray7_bit_mask to i8)
; CHECK-NEXT: [[and:%.*]] = and i8 [[load]], ptrtoint ([0 x i8]* @__typeid_bytearray7_bit_mask to i8)
; CHECK-NEXT: [[ne:%.*]] = icmp ne i8 [[and]], 0
; CHECK-NEXT: br i1 [[ne]], label %[[t:.*]], label %[[f:.*]]