[Mesa-dev] [PATCH 4/8] radeonsi: set the calling convention for inlined function calls

[Bas Nieuwenhuizen]

r-b

On Thu, Jun 20, 2019 at 6:19 AM Marek Olšák <maraeo at gmail.com> wrote:
>
> From: Marek Olšák <marek.olsak at amd.com>
>
> otherwise the behavior is undefined
> ---
>  src/amd/common/ac_llvm_build.c                         | 8 ++++++++
>  src/amd/common/ac_llvm_build.h                         | 3 +++
>  src/gallium/drivers/radeonsi/si_compute_prim_discard.c | 2 +-
>  src/gallium/drivers/radeonsi/si_shader.c               | 2 +-
>  4 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
> index 1e6247ad72e..cdd4c36f5da 100644
> --- a/src/amd/common/ac_llvm_build.c
> +++ b/src/amd/common/ac_llvm_build.c
> @@ -4427,10 +4427,18 @@ ac_build_ddxy_interp(struct ac_llvm_context *ctx, LLVMValueRef interp_ij)
>
>  LLVMValueRef
>  ac_build_load_helper_invocation(struct ac_llvm_context *ctx)
>  {
>         LLVMValueRef result = ac_build_intrinsic(ctx, "llvm.amdgcn.ps.live",
>                                                  ctx->i1, NULL, 0,
>                                                  AC_FUNC_ATTR_READNONE);
>         result = LLVMBuildNot(ctx->builder, result, "");
>         return LLVMBuildSExt(ctx->builder, result, ctx->i32, "");
>  }
> +
> +LLVMValueRef ac_build_call(struct ac_llvm_context *ctx, LLVMValueRef func,
> +                          LLVMValueRef *args, unsigned num_args)
> +{
> +       LLVMValueRef ret = LLVMBuildCall(ctx->builder, func, args, num_args, "");
> +       LLVMSetInstructionCallConv(ret, LLVMGetFunctionCallConv(func));
> +       return ret;
> +}
> diff --git a/src/amd/common/ac_llvm_build.h b/src/amd/common/ac_llvm_build.h
> index a1654d2b2c4..1928843c78c 100644
> --- a/src/amd/common/ac_llvm_build.h
> +++ b/src/amd/common/ac_llvm_build.h
> @@ -713,20 +713,23 @@ ac_build_frexp_exp(struct ac_llvm_context *ctx, LLVMValueRef src0,
>  LLVMValueRef
>  ac_build_frexp_mant(struct ac_llvm_context *ctx, LLVMValueRef src0,
>                     unsigned bitsize);
>
>  LLVMValueRef
>  ac_build_ddxy_interp(struct ac_llvm_context *ctx, LLVMValueRef interp_ij);
>
>  LLVMValueRef
>  ac_build_load_helper_invocation(struct ac_llvm_context *ctx);
>
> +LLVMValueRef ac_build_call(struct ac_llvm_context *ctx, LLVMValueRef func,
> +                          LLVMValueRef *args, unsigned num_args);
> +
>  LLVMValueRef ac_build_atomic_rmw(struct ac_llvm_context *ctx, LLVMAtomicRMWBinOp op,
>                                  LLVMValueRef ptr, LLVMValueRef val,
>                                  const char *sync_scope);
>
>  LLVMValueRef ac_build_atomic_cmp_xchg(struct ac_llvm_context *ctx, LLVMValueRef ptr,
>                                       LLVMValueRef cmp, LLVMValueRef val,
>                                       const char *sync_scope);
>
>  #ifdef __cplusplus
>  }
> diff --git a/src/gallium/drivers/radeonsi/si_compute_prim_discard.c b/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
> index 0f2934243a1..28da7b92250 100644
> --- a/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
> +++ b/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
> @@ -660,21 +660,21 @@ void si_build_prim_discard_compute_shader(struct si_shader_context *ctx)
>                         index[1] = LLVMBuildSelect(builder, prim_is_odd, index0, index1, "");
>                 }
>         }
>
>         /* Execute the vertex shader for each vertex to get vertex positions. */
>         LLVMValueRef pos[3][4];
>         for (unsigned i = 0; i < vertices_per_prim; i++) {
>                 vs_params[param_vertex_id] = index[i];
>                 vs_params[param_instance_id] = instance_id;
>
> -               LLVMValueRef ret = LLVMBuildCall(builder, vs, vs_params, num_vs_params, "");
> +               LLVMValueRef ret = ac_build_call(&ctx->ac, vs, vs_params, num_vs_params);
>                 for (unsigned chan = 0; chan < 4; chan++)
>                         pos[i][chan] = LLVMBuildExtractValue(builder, ret, chan, "");
>         }
>
>         /* Divide XYZ by W. */
>         for (unsigned i = 0; i < vertices_per_prim; i++) {
>                 for (unsigned chan = 0; chan < 3; chan++)
>                         pos[i][chan] = ac_build_fdiv(&ctx->ac, pos[i][chan], pos[i][3]);
>         }
>
> diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
> index eb75e2a77a4..54b29d0ae01 100644
> --- a/src/gallium/drivers/radeonsi/si_shader.c
> +++ b/src/gallium/drivers/radeonsi/si_shader.c
> @@ -6584,21 +6584,21 @@ static void si_build_wrapper_function(struct si_shader_context *ctx,
>                                         }
>                                 } else {
>                                         arg = LLVMBuildBitCast(builder, arg, param_type, "");
>                                 }
>                         }
>
>                         in[param_idx] = arg;
>                         out_idx += param_size;
>                 }
>
> -               ret = LLVMBuildCall(builder, parts[part], in, num_params, "");
> +               ret = ac_build_call(&ctx->ac, parts[part], in, num_params);
>
>                 if (is_merged_shader(ctx) &&
>                     part + 1 == next_shader_first_part) {
>                         lp_build_endif(&if_state);
>
>                         /* The second half of the merged shader should use
>                          * the inputs from the toplevel (wrapper) function,
>                          * not the return value from the last call.
>                          *
>                          * That's because the last call was executed condi-
> --
> 2.17.1
>
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