similar to: question on the signature of malloc

Hi, I encountered an issue when attempting to create a call to function malloc. I just want to do a simple thing, suppose there is a variable p, if p is a pointer then allocate memory to p. Source code: int *p; p = (int *) malloc(sizeof(*p)); Try to generate LLVM IR for it: Type *tp = p->getType(); AllocaInst* arg_alloc = builder.CreateAlloca(tp);//builder is IRBuilder

Hi, I have problem with IRBuilderBase::InsertPointGuard class that simply does not work in the release build of my project. The class does not restore the IRBuilder's insert point correctly when NDEBUG macro is set. It happens on OSX system only, trunk version of the LLVM built with brew. I suspect it is the ABI problem. InsertPointGuard uses AssertingVT for debug builds. LLDB gets confused

On Tue, Aug 25, 2015 at 11:54 PM, celelibi--- via Syslinux <syslinux at zytor.com> wrote: > From: Sylvain Gault <sylvain.gault at gmail.com> > > Some firmware implementations may need ExitBootServices to be called > twice. The second time with an updated memory map key. > > Signed-off-by: Sylvain Gault <sylvain.gault at gmail.com> > --- > efi/main.c | 75

On Wed, 26 Aug 2015 05:54:04 +0200 celelibi--- via Syslinux <syslinux at zytor.com> wrote: > From: Sylvain Gault <sylvain.gault at gmail.com> > > Some firmware implementations may need ExitBootServices to be called > twice. The second time with an updated memory map key. > > Signed-off-by: Sylvain Gault <sylvain.gault at gmail.com> > --- > efi/main.c |

Hi all, I added support for the allocsize function attribute to our compiler (LDC), thinking that that would enable removal of function calls when the allocated memory is not used. For example: ``` declare i8* @my_malloc(i32) allocsize(0) define void @test_malloc() { %1 = call i8* @my_malloc(i32 100) ret void } ``` I thought the my_alloc call in test_malloc would be removed, but `opt -O3`

This addition converts strlen() calls to strnlen() when the result is compared to a constant. For example, the following: strlen(s) < 5 Becomes: strnlen(s, 5) < 5 That way, we don't have to walk through the entire string. There is the added overhead of maintaining a counter when using strnlen(), but I thought I'd start with the general case. It may make sense to only use this

On Mon, Nov 2, 2015 at 10:23 PM, Celelibi <celelibi at gmail.com> wrote: > 2015-11-02 12:34 UTC+01:00, Gene Cumm <gene.cumm at gmail.com>: >> On Tue, Aug 25, 2015 at 11:54 PM, celelibi--- via Syslinux >> <syslinux at zytor.com> wrote: >>> From: Sylvain Gault <sylvain.gault at gmail.com> >>> >>> Some firmware implementations may need

Hi, I was compiling libc++ with a recent TOT (248571) and when I got to the ARMv6, I got a code generation error in memory.cpp: fatal error: error in backend: Cannot select: intrinsic %llvm.arm.clrex ecc: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 3.8.0 (trunk) It looks as if the newly added emitAtomicCmpXchgNoStoreLLBalance() function is

Hello, My code: (CallInst *CI, IRBuilder<> &B) SmallVector<Value *, 8> args; Value *v = B.CreateGlobalString("hi", "str"); args.push_back(v); SmallVector<Type*, 8> params; params.push_back(v->getType()); Module *M = B.GetInsertBlock()->getParent()->getParent(); FunctionType *printfType =

On Fri, Sep 25, 2015 at 2:17 PM, JF Bastien <jfb at google.com> wrote: > Looks like this was caused by r248294. Author CC'ed. > > On Fri, Sep 25, 2015 at 1:46 PM, Richard Pennington via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> >> Hi, >> >> I was compiling libc++ with a recent TOT (248571) and when I got to the >> ARMv6, I got a

Since Linux 4.7, the process umask is available in /proc/<pid>/status. See: https://github.com/torvalds/linux/commit/3e42979e65dace1f9268dd5440e5ab096b8dee59 Use this value if available, else fall back to the existing codepath for Linux <= 4.6 and other Unix. --- src/umask.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 78 insertions(+), 8

Hi Duncan & Tobi, Thanks a lot for your interest, and for pointing out differences in GIMPLE I missed. Attached is simplified test case. Is it good? Tobi, regarding runtime alias analysis: in KernelGen we already do it along with runtime values substitution. For example: <------------------ __kernelgen_main_loop_17: compile started ---------------------> Integer args substituted:

Hi (Gordon). There appears to be two wrapper functions for DerivedType::refineAbstractTypeTo() in llvm-c (Core.h, Core.cpp): void LLVMRefineAbstractType(LLVMTypeRef AbstractType, LLVMTypeRef ConcreteType){ DerivedType *Ty = unwrap<DerivedType>(AbstractType); Ty->refineAbstractTypeTo(unwrap(ConcreteType)); } void LLVMRefineType(LLVMTypeRef AbstractTy, LLVMTypeRef ConcreteTy) {

Hi all, sorry to have sent the same question around. I am quite desperately looking for a solution to this problem and I figured the mailing list is the best bet. In my code, I generate the following function: define i32 @gl.qi([500 x i32] %x, i32 %i) { entry: %x. = alloca [500 x i32] %i. = alloca i32 %0 = alloca [500 x i32] store [500 x i32] %x, [500 x i32]* %x. store i32 %i, i32*

From: Sylvain Gault <sylvain.gault at gmail.com> On some architecture, including my hardware, the function ExitBootServices may need to be called twice in order to successfully exit the boot services. As stated by the UEFI spec, the first call to ExitBootServices may perform a partial shutdown of the services. It seems that during this partial shutdown, the memory map can be modified, thus

Maybe we could list some of these as a GSoC project? Seems like a self-contained task that can be simple as desired and as hard as the student wants it to be. Nuno -----Original Message----- From: Philip Reames via llvm-dev Sent: Friday, February 16, 2018 6:48 PM To: llvm-dev Subject: Re: [llvm-dev] Missing attribute inference cases On 02/16/2018 10:29 AM, Philip Reames via llvm-dev wrote:

If either zcat or cpio fails when spawned in initrd-list, pclose will return the actual return value of it, but reply_with_perror still uses errno regardless; thus, the reported error is: libguestfs: error: initrd_list: pclose: Success which is not much helpful. Instead, when pclose returns > 0, extract the actual return value of the subprocess, and print that. Thus now we get for example:

From: Sylvain Gault <sylvain.gault at gmail.com> Some firmware implementations may need ExitBootServices to be called twice. The second time with an updated memory map key. Signed-off-by: Sylvain Gault <sylvain.gault at gmail.com> --- efi/main.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 64 insertions(+), 11 deletions(-) diff --git

On 02/16/2018 10:29 AM, Philip Reames via llvm-dev wrote: > > This email is just to summarize a bit of digging I did last night into > our attribute inference.  Unfortunately, I'm not going to have time to > implement any of the gaps I noticed, but I figured someone else out > there might be interested. > > *Missing Attributes* > > argmemonly - influences AA,

Sure, but is anyone willing to mentor?  I don't have time.  I can advise, but only infrequently. Philip On 02/16/2018 03:47 PM, Davide Italiano wrote: > Yes, I agree with you this sounds like a great GSoC. > > On Fri, Feb 16, 2018 at 3:42 PM, Nuno Lopes via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> Maybe we could list some of these as a GSoC project?