[Mesa-dev] [PATCH 2/4] gallivm: allow additional llc options

[Nicolai Hähnle]

On 28.09.2017 20:09, Ben Crocker wrote:
> In init_native_targets, allow the passing of additional options to
> the LLC compiler via new GALLIVM_LLC_OPTIONS environmental control.
> This option is available only #ifdef DEBUG, initially.
> At top, add #include <llvm-c/Support.h> for LLVMParseCommandLineOptions()
> declaration.
> 
> Cc: "17.2" <mesa-stable at lists.freedesktop.org>
> 
> Signed-off-by: Ben Crocker <bcrocker at redhat.com>
> ---
>   src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 21 +++++++++++++++++++++
>   1 file changed, 21 insertions(+)
> 
> diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> index 342cb38..0b43c96 100644
> --- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> +++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> @@ -49,6 +49,7 @@
>   #endif
>   
>   #include <llvm-c/Core.h>
> +#include <llvm-c/Support.h>
>   #include <llvm-c/ExecutionEngine.h>
>   #include <llvm/Target/TargetOptions.h>
>   #include <llvm/ExecutionEngine/ExecutionEngine.h>
> @@ -122,6 +123,26 @@ static void init_native_targets()
>      llvm::InitializeNativeTargetAsmPrinter();
>   
>      llvm::InitializeNativeTargetDisassembler();
> +#if DEBUG
> +   {
> +      char *env_llc_options = getenv("GALLIVM_LLC_OPTIONS");
> +      if (env_llc_options) {
> +         char *option;
> +         char *options[64] = {(char *) "llc"};      // Warning without cast
> +         int   n;
> +         for (n = 0, option = strtok(env_llc_options, " "); option; n++, option = strtok(NULL, " ")) {
> +            options[n + 1] = option;
> +         }
> +         if (gallivm_debug & (GALLIVM_DEBUG_IR | GALLIVM_DEBUG_ASM | GALLIVM_DEBUG_DUMP_BC)) {
> +            debug_printf("llc additional options (%d):\n", n);
> +            for (int i = 1; i <= n; i++)
> +               debug_printf("\t%s\n", options[i]);
> +            debug_printf("\n");
> +         }
> +         LLVMParseCommandLineOptions(n + 1, options, NULL);
> +      }
> +   }
> +#endif

Just FYI, we're also calling LLVMParseCommandLineOptions from 
ac_llvm_util.c, and that function doesn't seem to appreciate being 
called multiple times. Not really an issue here since this will surely 
only be used for llvmpipe, so:

Acked-by: Nicolai Hähnle <nicolai.haehnle at amd.com>


>   }
>   
>   extern "C" void
> 


-- 
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Aber vergiss niemals, wie sie sein sollte.