search for: markleon

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2008 Jun 03
2
[LLVMdev] Truncate float to int?
Newbie question here: what's the best way to truncate a float to a signed int? The fptosi instruction rounds, and the fptrunc instruction simply truncates from a large float type to a smaller float type. Mark
2008 Jun 03
0
[LLVMdev] Truncate float to int?
On Tue, Jun 3, 2008 at 11:32 AM, Mark Leone <markleone at gmail.com> wrote: > Newbie question here: what's the best way to truncate a float to a > signed int? The fptosi instruction rounds, and the fptrunc > instruction simply truncates from a large float type to a smaller > float type. fptosi is equivalent to a C cast from float...
2008 Jul 24
1
[LLVMdev] Irreducible CFG from tail duplication
...ret void continue.i3: ; preds = %foo.exit, %then.i br label %foo.exit4 foo.exit4: ; preds = %continue.i3 ret void } On Thu, Jul 24, 2008 at 3:38 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Thu, Jul 24, 2008 at 2:00 PM, Mark Leone <markleone at gmail.com> wrote: >> Is irreducibility a problem for existing LLVM passes? > > There aren't any LLVM passes that expect a reducible CFG at the > moment; of course, some passes are more effective with reducible CFGs. > >> It looks like >> there was once an op...
2008 Jul 24
0
[LLVMdev] Irreducible CFG from tail duplication
On Thu, Jul 24, 2008 at 2:00 PM, Mark Leone <markleone at gmail.com> wrote: > Is irreducibility a problem for existing LLVM passes? There aren't any LLVM passes that expect a reducible CFG at the moment; of course, some passes are more effective with reducible CFGs. > It looks like > there was once an open project for a pass to make...
2008 Jul 24
3
[LLVMdev] Irreducible CFG from tail duplication
It seems that tail duplication can make a reducible CFG irreducible (example below). Is that intentional? Are there other optimizations that have that property? Is irreducibility a problem for existing LLVM passes? It looks like there was once an open project for a pass to make irreducible graphs reducible. Was that ever implemented? - Mark ; "opt -inline -tailduplicate" makes an
2009 Jan 08
1
[LLVMdev] Integer typedefs for MSVC
LLVM's typedefs for int32_t etc. under MSVC (in Support/DataTypes.h) conflict with those used by other third-party libraries. Instead of these: #ifdef _MSC_VER typedef __int64 int64_t; typedef unsigned __int64 uint64_t; typedef signed int int32_t; typedef unsigned int uint32_t; typedef short int16_t; typedef unsigned short uint16_t; typedef signed char int8_t; typedef unsigned char uint8_t;