llc -march=x86 tempfileB.bc yields:
llc: for the -march option: : Cannot find option named 'x86'!
Windows build using Visual Studio 2008 Express with CMake.
clang and other tools seem to also complain about the format of -march,
but other command line arguments seem to be working. Tools, clang
llvm-as, opt, etc., "seem" to be working.
Incidently, the bytecode file was built using this command:
clang test1.c -emit-llvm > tempfileA
llvm-as < tempfileA > tempfileB.bc
Contents of tempfileA is:
; ModuleID = 'test1.c'
target 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"
target triple = "i686-pc-win32"
define i32 @main(...) nounwind {
entry:
%retval = alloca i32 ; <i32*> [#uses=1]
%i = alloca i32, align 4 ; <i32*> [#uses=5]
%j = alloca i32, align 4 ; <i32*> [#uses=1]
store i32 0, i32* %i
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%tmp = load i32* %i ; <i32> [#uses=1]
%cmp = icmp slt i32 %tmp, 10 ; <i1> [#uses=1]
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%tmp1 = load i32* %i ; <i32> [#uses=1]
%add = add i32 %tmp1, 5 ; <i32> [#uses=1]
store i32 %add, i32* %j
br label %for.inc
for.inc: ; preds = %for.body
%tmp2 = load i32* %i ; <i32> [#uses=1]
%inc = add i32 %tmp2, 1 ; <i32> [#uses=1]
store i32 %inc, i32* %i
br label %for.cond
for.end: ; preds = %for.cond
br label %return
return: ; preds = %for.end
%0 = load i32* %retval ; <i32> [#uses=1]
ret i32 %0
}
Hello, On Fri, Nov 14, 2008 at 6:57 PM, H. Johnson <misc at faradayco.com> wrote:> llc -march=x86 tempfileB.bc yields: > llc: for the -march option: : Cannot find option named 'x86'!Run llc -help and see, if any backends were linked in. It will show you list of all backends, which were 'registered' and thus known to llc. -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University
On Fri, Nov 14, 2008 at 7:57 AM, H. Johnson <misc at faradayco.com> wrote:> llc -march=x86 tempfileB.bc yields: > llc: for the -march option: : Cannot find option named 'x86'! > > Windows build using Visual Studio 2008 Express with CMake.Currently the CMake project (on Windows) doesn't cause any backends to be included in llc (due to the stripping of unreferenced global objects). I posted a patch a couple days ago if you want to try it, or Oscar intends to improve/fix/reimplement and commit shortly. scott
CMake was set as follows:
LLVM_TARGETS_TO_BUILD CBackend;PIC16;X86
Here's what llc returned:
OVERVIEW: llvm system compiler
USAGE: llc [options] <input bitcode>
OPTIONS:
-asm-verbose - Add comments to directives.
-code-model - Choose code model
=default - Target default code model
=small - Small code model
=kernel - Kernel code model
=medium - Medium code model
=large - Large code model
-disable-excess-fp-precision - Disable optimizations that may
increase FP precision
-disable-fp-elim - Disable frame pointer
elimination optimization
-disable-post-RA-scheduler - Disable scheduling after
register allocation
-enable-correct-eh-support - Make the -lowerinvoke pass
insert expensive, but correct, EH code
-enable-eh - Emit DWARF exception handling
(default if target supports)
-enable-finite-only-fp-math - Enable optimizations that
assumes non- NaNs / +-Infs
-enable-unsafe-fp-math - Enable optimizations that may
decrease FP precision
-f - Overwrite output files
-fast - Generate code quickly,
potentially sacrificing code quality
-filetype - Choose a file type (not all
types are supported by all targets):
=asm - Emit an assembly ('.s') file
=obj - Emit a native object ('.o')
file [experimental]
=dynlib - Emit a native dynamic library
('.so') file [experimental]
-help - Display available options
(--help-hidden for more)
-join-liveintervals - Coalesce copies (default=true)
-limit-float-precision=<uint> - Generate low-precision inline
sequences for some float libcalls
-load=<pluginfilename> - Load the specified plugin
-march - Architecture to generate code for:
-mattr=<a1,+a2,-a3,...> - Target specific attributes
(-mattr=help for details)
-mcpu=<cpu-name> - Target a specific cpu type
(-mcpu=help for details)
-mtriple=<string> - Override target triple for module
-nozero-initialized-in-bss - Don't place zero-initialized
symbols into bss section
-o=<filename> - Output filename
-pre-RA-sched - Instruction schedulers available
(before register allocation):
=default - Best scheduler for the target
=fast - Fast suboptimal list scheduling
=list-td - Top-down list scheduler
=list-burr - Bottom-up register reduction
list scheduling
=list-tdrr - Top-down register reduction
list scheduling
-print-machineinstrs - Print generated machine code
-realign-stack - Realign stack if needed
-regalloc - Register allocator to use:
(default = linearscan)
=simple - simple register allocator
=local - local register allocator
=bigblock - Big-block register allocator
=linearscan - linear scan register allocator
=pbqp - PBQP register allocator
-relocation-model - Choose relocation model
=default - Target default relocation model
=static - Non-relocatable code
=pic - Fully relocatable, position
independent code
=dynamic-no-pic - Relocatable external
references, non-relocatable code
-schedule-livein-copies - Schedule copies of livein registers
-soft-float - Generate software floating point
library calls
-spiller - Spiller to use: (default: local)
=simple - simple spiller
=local - local spiller
-stack-alignment=<uint> - Override default stack alignment
-stack-protector-buffer-size=<uint> - The lower bound for a buffer to
be considered for stack smashing protection.
-stats - Enable statistics output from
program
-tailcallopt - Turn on tail call optimization.
-time-passes - Time each pass, printing elapsed
time for each on exit
-unwind-tables - Generate unwinding tables for
all functions
-verify-dom-info - Verify dominator info (time
consuming)
-version - Display the version of this program
Anton Korobeynikov wrote:> Hello,
>
> On Fri, Nov 14, 2008 at 6:57 PM, H. Johnson <misc at faradayco.com>
wrote:
>
>> llc -march=x86 tempfileB.bc yields:
>> llc: for the -march option: : Cannot find option named 'x86'!
>>
> Run llc -help and see, if any backends were linked in. It will show
> you list of all backends, which were 'registered' and thus known to
> llc.
>
>
Hi, I assume that the following means the backends are not registred: sequences for some float libcalls -load=<pluginfilename> - Load the specified plugin -march - Architecture to generate code for: -mattr=<a1,+a2,-a3,...> - Target specific attributes (-mattr=help for details) When does the registration occur? During the build? If so there's a problem with CMake for Visual Studio. Or, is it something I need to do manually after building? Thanks for any help. I'm too new at this. Henry Anton Korobeynikov wrote:> Hello, > > On Fri, Nov 14, 2008 at 6:57 PM, H. Johnson <misc at faradayco.com> wrote: > >> llc -march=x86 tempfileB.bc yields: >> llc: for the -march option: : Cannot find option named 'x86'! >> > Run llc -help and see, if any backends were linked in. It will show > you list of all backends, which were 'registered' and thus known to > llc. > >