Displaying 20 results from an estimated 81 matches for "setalign".
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sectalign
2015 Mar 05
4
[LLVMdev] global variable
Hi all,
I am newbie for llvm. I just create a global variable, there are some statements in my pass like:
LoadInst* int64_64 = new LoadInst(pthreadPID, "", false, OptAplusOne);
int64_64->setAlignment(8);
int64_64->dump();
LoadInst* int32_65 = new LoadInst(gvar_int32_myFlag, "", false, OptAplusOne);
int32_65->setAlignment(4);
int32_65->dump();
But when I run my pass, it generates an error, I don't know why.
@myFlag = global i32 0, align 4
@myPid =...
2008 Jul 10
1
[LLVMdev] InstructionCombining forgets alignment of globals
On Thursday 10 July 2008 07:46, Nicolas Capens wrote:
> Hi Duncan,
>
> I see. I didn't know GlobalValue had a method for changing the alignment
> (and that 0 meant natural alignment). Explicitly calling setAlignment works
> like a charm.
Nicolas,
Where are you explicitly calling setAlignment? From llvm-gcc code?
-Dave
2017 May 22
2
How exactly is datatype alignment determined?
The 8 in the data layout string should have been converted to a byte value
by this code before it was passed to setAlignment. As far as I cant ell
getAlignment should return the byte alignment that was passed to
setAlignment, not the bit alignment from the string.
// ABI alignment.
if (Rest.empty())
report_fatal_error(
"Missing alignment specification in datalayout string");...
2011 Aug 19
1
[LLVMdev] LLVM: Very simple question
Hi, guys. I'm a newbie to LLVM and have a very simple question.
Which instructions should I use (in terms of IRBuilder calls) to allocate an
array of bytes in stack (alloca?), then to work with it (from a given
offset) as with integer (bitcast?). I mean something like that:
unsigned char var[8];
unsigned int offset = 3;
int val = *(int*)(&var+offset); /* read */
*(int*)(&var+offset)
2019 Feb 22
2
Create the GlobalVariable which have extern in one header file
..._TABLE[];
And with a LLVM PASS, I am trying to create this array with the same name and with initializer. So, I have following:
GlobalVariable *gvar_data = new GlobalVariable(
M, blockItems->getType(), true, GlobalValue::CommonLinkage,
blockItems, "DATA_TABLE");
gvar_data->setAlignment(16);
gvar_data->setSection("data_section");
gvar_data->addAttribute(llvm::Attribute::OptimizeNone);
I am not sure if I am using the correct Linkage or not.
The pass has failed to complete it. Here is the runtime fault. Any guess what I am doing incorrect?
'common' glob...
2012 Jul 04
2
[LLVMdev] Bogus assert in VMCore/Instructions.cpp CallInst::Create?
...g1 = new GlobalVariable( *F->getParent(),
s1Ty,
true,
GlobalValue::PrivateLinkage,
0,
"");
g1->setAlignment(1);
g2 = new GlobalVariable( *F->getParent(),
s2Ty,
true,
GlobalValue::PrivateLinkage,
0,
"");...
2010 Mar 09
3
[LLVMdev] Alignment for Alloca Inst in llvm 2.6
...; <i32*> [#uses=1]
%0 = call i8* @handle_args(i32 %argc, i8** %argv) ; <i8*> [#uses=1]
%argv_temp = bitcast i8* %0 to i8** ; <i8**> [#uses=1]
%a = alloca [100 x i32], align 512 ; <[100 x i32]*> [#uses=2]
2. I notice that the setAlignment method for an AllocaInst takes an
unsigned. For 64 bit systems, alignment could potentially be larger. Is
there a reason why the alignment should be restricted to this size?
Thanks in advance
Arushi
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2008 Jul 10
2
[LLVMdev] InstructionCombining forgets alignment of globals
Hi Nicolas,
> if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
>
> unsigned Align = GV->getAlignment();
>
> if (Align == 0 && TD && GV->getType()->getElementType()->isSized())
>
> Align = TD->getPrefTypeAlignment(GV->getType()->getElementType());
>
> It assumes that global values are always optimally
2008 Jul 10
0
[LLVMdev] InstructionCombining forgets alignment of globals
Hi Duncan,
I see. I didn't know GlobalValue had a method for changing the alignment
(and that 0 meant natural alignment). Explicitly calling setAlignment works
like a charm.
So it's not an LLVM bug.
Thanks,
Nicolas
-----Original Message-----
From: Duncan Sands [mailto:baldrick at free.fr]
Sent: Thursday, 10 July, 2008 14:41
To: llvmdev at cs.uiuc.edu
Cc: Nicolas Capens
Subject: Re: [LLVMdev] InstructionCombining forgets alignment of gl...
2019 Feb 22
1
Create the GlobalVariable which have extern in one header file
...6 #0
In my uses:
%arrayidx = getelementptr inbounds [0 x i8*], [0 x i8*]* @DATA_TABLE, i64 0, i64 %3
Why it is creating another global variable instead of linking? Is that because of array size mismatch?
Here is my code:
GlobalVariable *old = M.getGlobalVariable("DATA_TABLE");
old->setAlignment(16);
old->setSection("data_section");
old->addAttribute(llvm::Attribute::OptimizeNone);
old->setDSOLocal(false);
GlobalVariable *gNew = new GlobalVariable(
M, blockItems->getType(), false, GlobalValue::ExternalLinkage,
blockItems, "DATA_TABLE");
gNew->setAlig...
2012 Jul 04
0
[LLVMdev] Bogus assert in VMCore/Instructions.cpp CallInst::Create?
...;getParent(),
> s1Ty,
> true,
> GlobalValue::PrivateLinkage,
> 0,
> "");
> g1->setAlignment(1);
>
> g2 = new GlobalVariable( *F->getParent(),
> s2Ty,
> true,
> GlobalValue::PrivateLinkage,
> 0,
>...
2007 Nov 07
3
[LLVMdev] RFC: llvm-convert.cpp Patch
..._align(exp) / 8;
if (!LV.isBitfield()) {
if (!DestLoc) {
@@ -2548,17 +2549,17 @@
Value *Ptr = CastToType(Instruction::BitCast, LV.Ptr,
PointerType::get(Ty));
LoadInst *LI = Builder.CreateLoad(Ptr, isVolatile, "tmp");
- LI->setAlignment(Alignment);
+ LI->setAlignment(DstAlign);
return LI;
} else {
EmitAggregateCopy(DestLoc, LV.Ptr, TREE_TYPE(exp), false,
isVolatile,
- Alignment);
+ std::min(DstAlign, SrcAlign));
return 0;
}
} else {...
2015 Mar 10
3
[LLVMdev] Chatty C++API code generation
...es.push_back(const_int32_104);
Constant* const_ptr_113 = ConstantExpr::getGetElementPtr(gvar_struct_adam,
const_ptr_113_indices);
//here we have const_ptr_113; why not use it in theCallInst?
LoadInst* float_130 = new LoadInst(const_ptr_113, "", false,
label_entry_121);
float_130->setAlignment(4);
CallInst* float_call = CallInst::Create(func__Z4fib3f, float_130, "call",
label_entry_121);
------------------------------------------------
To me, this ll code seems to relate to something like
int main() {
float localfloat=foo.weight;
callAFunction(localfloat);
This...
2012 Aug 22
1
[LLVMdev] Insert Self Written Function Call from a FunctionPass?
...aInst* count;
namespace{
struct bishe_insert : public FunctionPass{
static char ID;
bishe_insert() : FunctionPass(ID) {}
virtual bool runOnFunction(Function &func)
{
count = new AllocaInst(IntegerType::getInt32Ty(Context), 0, "count");
count->setAlignment(4);
for(Function::iterator F = func.begin(), E = func.end(); F!= E; ++F)
{
if(F == func.begin())
{
bishe_insert::insertOnFirstBlock(F);
}
bishe_insert::runOnBasicBlock(F);
}
return false;
}
/*insert alloca ins...
2019 Jan 29
2
[cfe-dev] Create a BlockAddress array from LLVM Pass
...able(
>
> /*Module=*/*fn->getParent(),
>
> /*Type=*/PointerTy,
>
> /*isConstant=*/false,
>
> /*Linkage=*/GlobalValue::InternalLinkage,
>
> /*Initializer=*/0, // has initializer, specified below
>
> /*Name=*/"labelTracker");
>
> gvar_ptr_abc->setAlignment(16);
>
> Constant *blockItems = ConstantDataArray::get(fn->getContext(), tmp);
>
> gvar_ptr_abc->setInitializer(blockItems);
>
> I get error with following: Unsupported type in Type::getScalarTy
>
>
>
> Can anyone suggest what I suppose to do? It is definitel...
2010 Oct 24
2
[LLVMdev] lli : external functions and target datalayout
...get datalayout =
"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
If I use this string to creat a TargetData object directly, I got an
assertion error:
~/llvm-2.6/lib/Target/TargetData.cpp:246: void
llvm::TargetData::setAlignment(llvm::AlignTypeEnum, unsigned char,
unsigned char, uint32_t): Assertion `abi_align <= pref_align &&
"Preferred alignment worse than ABI!"' failed.
Aborted
This is because of the i64:32:64. It seems to be i64:64:64. 'lli' is
able to fix this problem automaticall...
2015 Mar 07
2
[LLVMdev] cannot understand global c++API code
...98);
const_ptr_103_indices.push_back(const_int32_99);
Constant* const_ptr_103 = ConstantExpr::getGetElementPtr(gvar_struct_foo,
const_ptr_103_indices);
//the store inst is in principle clear
StoreInst* void_119 = new StoreInst(const_float_102, const_ptr_103, false,
label_entry_113);
void_119->setAlignment(4);
---------------------------------------------
comment:
I don't get whats the meaning of the two const_int32 (98 & 99 above) and why
the const_ptr_103 should relate the foo.weight field of the stest struct.
Any hint appreciated!
Alex
2007 Nov 07
0
[LLVMdev] RFC: llvm-convert.cpp Patch
On Nov 6, 2007, at 5:45 PM, Bill Wendling wrote:
> Hi all,
>
> This patch is to fix a problem on PPC64 where an unaligned memcpy is
> generated. The testcase is this:
>
> $ cat testcase.c
> void Qux() {
> char Bar[11] = {0};
> }
>
> What happens is that we produce LLVM code like this:
>
> call void @llvm.memcpy.i64( i8* %event_list2, i8* getelementptr ([11
2019 Jan 28
2
Create a BlockAddress array from LLVM Pass
...b);
tmp.push_back(bba);
GlobalVariable *gvar_ptr_abc = new GlobalVariable(
/*Module=*/*fn->getParent(),
/*Type=*/PointerTy,
/*isConstant=*/false,
/*Linkage=*/GlobalValue::InternalLinkage,
/*Initializer=*/0, // has initializer, specified below
/*Name=*/"labelTracker");
gvar_ptr_abc->setAlignment(16);
Constant *blockItems = ConstantDataArray::get(fn->getContext(), tmp);
gvar_ptr_abc->setInitializer(blockItems);
I get error with following: Unsupported type in Type::getScalarTy
Can anyone suggest what I suppose to do? It is definitely related to my type declaration and BlockAddress...
2009 Jun 03
1
[LLVMdev] RFA: Alignment of Strings
...n 72733)
+++ llvm-gcc.src/gcc/llvm-convert.cpp (working copy)
@@ -7418,6 +7418,8 @@
TAI ?
TAI->getStringConstantPrefix() :
".str", TheModule);
+ GV->setAlignment(TYPE_ALIGN(TREE_TYPE(exp)));
+
if (SlotP) *SlotP = GV;
#ifdef LLVM_CSTRING_SECTION
// For Darwin, try to put it into the .cstring section.