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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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dfd3b54e
编写于
3月 19, 2021
作者:
D
Dmitriy Dolovov
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电子邮件补丁
差异文件
Native: Handle integer overflow on div/rem of Int.MIN_VALUE by -1
^KT-45136
上级
7fe0df28
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
37 addition
and
17 deletion
+37
-17
kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IntrinsicGenerator.kt
...jetbrains/kotlin/backend/konan/llvm/IntrinsicGenerator.kt
+37
-17
未找到文件。
kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IntrinsicGenerator.kt
浏览文件 @
dfd3b54e
...
...
@@ -14,7 +14,6 @@ import org.jetbrains.kotlin.ir.expressions.*
import
org.jetbrains.kotlin.ir.types.getClass
import
org.jetbrains.kotlin.ir.util.dump
import
org.jetbrains.kotlin.ir.util.findAnnotation
import
org.jetbrains.kotlin.ir.util.isSuspend
internal
enum
class
IntrinsicType
{
PLUS
,
...
...
@@ -630,27 +629,48 @@ internal class IntrinsicGenerator(private val environment: IntrinsicGeneratorEnv
}
private
fun
FunctionGenerationContext
.
emitSignedDiv
(
args
:
List
<
LLVMValueRef
>):
LLVMValueRef
{
val
(
first
,
second
)
=
args
if
(!
second
.
type
.
isFloatingPoint
())
{
emitThrowIfZero
(
second
)
}
return
if
(
first
.
type
.
isFloatingPoint
())
{
LLVMBuildFDiv
(
builder
,
first
,
second
,
""
)
val
(
dividend
,
divisor
)
=
args
val
divisorType
=
divisor
.
type
return
if
(!
divisorType
.
isFloatingPoint
())
{
emitThrowIfZero
(
divisor
)
emitSignedDivisionWithOverflow
(
dividend
,
divisor
,
divisorType
,
retZeroOnOverflow
=
false
)
{
LLVMBuildSDiv
(
builder
,
dividend
,
divisor
,
""
)
!!
}
}
else
{
LLVMBuild
SDiv
(
builder
,
first
,
second
,
""
)
}
!!
LLVMBuild
FDiv
(
builder
,
dividend
,
divisor
,
""
)
!!
}
}
private
fun
FunctionGenerationContext
.
emitSignedRem
(
args
:
List
<
LLVMValueRef
>):
LLVMValueRef
{
val
(
first
,
second
)
=
args
if
(!
second
.
type
.
isFloatingPoint
())
{
emitThrowIfZero
(
second
)
}
return
if
(
first
.
type
.
isFloatingPoint
())
{
LLVMBuildFRem
(
builder
,
first
,
second
,
""
)
val
(
dividend
,
divisor
)
=
args
val
divisorType
=
divisor
.
type
return
if
(!
divisorType
.
isFloatingPoint
())
{
emitThrowIfZero
(
divisor
)
emitSignedDivisionWithOverflow
(
dividend
,
divisor
,
divisorType
,
retZeroOnOverflow
=
true
)
{
LLVMBuildSRem
(
builder
,
dividend
,
divisor
,
""
)
!!
}
}
else
{
LLVMBuildSRem
(
builder
,
first
,
second
,
""
)
}
!!
LLVMBuildFRem
(
builder
,
dividend
,
divisor
,
""
)
!!
}
}
private
inline
fun
FunctionGenerationContext
.
emitSignedDivisionWithOverflow
(
dividend
:
LLVMValueRef
,
divisor
:
LLVMValueRef
,
type
:
LLVMTypeRef
,
retZeroOnOverflow
:
Boolean
,
nonOverflowValue
:
()
->
LLVMValueRef
):
LLVMValueRef
{
val
minValue
=
when
(
val
sizeInBits
=
type
.
sizeInBits
())
{
32
->
LLVMConstInt
(
type
,
Int
.
MIN_VALUE
.
toLong
(),
1
)
!!
64
->
LLVMConstInt
(
type
,
Long
.
MIN_VALUE
,
1
)
!!
else
->
error
(
"Unsupported signed integer division argument width: $sizeInBits"
)
}
val
minusOne
=
LLVMConstInt
(
type
,
-
1
,
1
)
!!
val
overflowValue
=
if
(
retZeroOnOverflow
)
Zero
(
type
).
llvm
else
minValue
return
ifThenElse
(
and
(
icmpEq
(
dividend
,
minValue
),
icmpEq
(
divisor
,
minusOne
)),
overflowValue
,
nonOverflowValue
)
}
private
fun
FunctionGenerationContext
.
emitUnsignedDiv
(
args
:
List
<
LLVMValueRef
>):
LLVMValueRef
{
...
...
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