how to create an llvm Type
up vote
0
down vote
favorite
I'm trying to create a TruncInst with an i8 destination type.
However, I can't seem to find an appropriate type constructor
when I look here. I expected it should be something simple like:
if (val->getType()->isIntegerTy(32))
TruncInst *ti = new TruncInst(val,new IntegerType(8));
But apparently it's not. I'm probably over looking something in the API.
Any help is very much appreciated, thanks!
types llvm llvm-ir bitcode
asked Nov 11 at 7:21
OrenIshShalom
915722
add a comment |
up vote
0
down vote
favorite
I'm trying to create a TruncInst with an i8 destination type.
However, I can't seem to find an appropriate type constructor
when I look here. I expected it should be something simple like:
if (val->getType()->isIntegerTy(32))
TruncInst *ti = new TruncInst(val,new IntegerType(8));
But apparently it's not. I'm probably over looking something in the API.
Any help is very much appreciated, thanks!
types llvm llvm-ir bitcode
asked Nov 11 at 7:21
OrenIshShalom
915722
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm trying to create a TruncInst with an i8 destination type.
However, I can't seem to find an appropriate type constructor
when I look here. I expected it should be something simple like:
if (val->getType()->isIntegerTy(32))
TruncInst *ti = new TruncInst(val,new IntegerType(8));
But apparently it's not. I'm probably over looking something in the API.
Any help is very much appreciated, thanks!
types llvm llvm-ir bitcode
asked Nov 11 at 7:21
OrenIshShalom
915722
I'm trying to create a TruncInst with an i8 destination type.
However, I can't seem to find an appropriate type constructor
when I look here. I expected it should be something simple like:
if (val->getType()->isIntegerTy(32))
TruncInst *ti = new TruncInst(val,new IntegerType(8));
But apparently it's not. I'm probably over looking something in the API.
Any help is very much appreciated, thanks!
types llvm llvm-ir bitcode
types llvm llvm-ir bitcode
asked Nov 11 at 7:21
OrenIshShalom
915722
asked Nov 11 at 7:21
OrenIshShalom
915722
asked Nov 11 at 7:21
OrenIshShalom
915722
asked Nov 11 at 7:21
OrenIshShalom
915722
asked Nov 11 at 7:21
OrenIshShalom
915722
915722
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
Type::getInt8Ty(getContext()); will get a type for you, assuming that you have a way to get the relevant context.
You cannot create an IntegerType yourself because LLVM's design says that if two types t1 and t2 are the same (e.g. both are 8-bit integer types) and exist in the same context, then t1==t2. Much LLVM code expects to test for equality using ==.
answered Nov 11 at 9:17
arnt
4,87431728
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
Type::getInt8Ty(getContext()); will get a type for you, assuming that you have a way to get the relevant context.
You cannot create an IntegerType yourself because LLVM's design says that if two types t1 and t2 are the same (e.g. both are 8-bit integer types) and exist in the same context, then t1==t2. Much LLVM code expects to test for equality using ==.
answered Nov 11 at 9:17
arnt
4,87431728
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
add a comment |
up vote
2
down vote
accepted
Type::getInt8Ty(getContext()); will get a type for you, assuming that you have a way to get the relevant context.
You cannot create an IntegerType yourself because LLVM's design says that if two types t1 and t2 are the same (e.g. both are 8-bit integer types) and exist in the same context, then t1==t2. Much LLVM code expects to test for equality using ==.
answered Nov 11 at 9:17
arnt
4,87431728
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
Type::getInt8Ty(getContext()); will get a type for you, assuming that you have a way to get the relevant context.
You cannot create an IntegerType yourself because LLVM's design says that if two types t1 and t2 are the same (e.g. both are 8-bit integer types) and exist in the same context, then t1==t2. Much LLVM code expects to test for equality using ==.
answered Nov 11 at 9:17
arnt
4,87431728
Type::getInt8Ty(getContext()); will get a type for you, assuming that you have a way to get the relevant context.
You cannot create an IntegerType yourself because LLVM's design says that if two types t1 and t2 are the same (e.g. both are 8-bit integer types) and exist in the same context, then t1==t2. Much LLVM code expects to test for equality using ==.
answered Nov 11 at 9:17
arnt
4,87431728
answered Nov 11 at 9:17
arnt
4,87431728
answered Nov 11 at 9:17
arnt
4,87431728
answered Nov 11 at 9:17
arnt
4,87431728
4,87431728
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
add a comment |
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
Could you please also add how can one get an LLVM context? thanks ...
– OrenIshShalom
Nov 11 at 9:51
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
You probably created one in main(); you have to do that before you do almost any kind of work with LLVM. Or you can get one from e.g. Module::getContext(), which returns the one that was created early.
– arnt
Nov 11 at 10:17
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
The code is actually from a LoopPass run by opt. So I guess that the pass manager somehow must have created it right?
– OrenIshShalom
Nov 11 at 10:38
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
No, the pass manager receives its module and context as an argument to run(). The context is typically created first, then one or more modules, then other things such as a pass manager.
– arnt
Nov 11 at 11:39
add a comment |
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