radeonsi: set shader calling conventions

Note that old mesa + new LLVM or new mesa + old LLVM breaks
with this change and the corresponding LLVM change (D18559).

For LLVM version <= 3.8 we use the old method, but we can't detect
people using a post 3.8 svn version that is still too old.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeon/radeon_llvm_emit.c b/src/gallium/drivers/radeon/radeon_llvm_emit.c
index 474154e..7174132 100644 (file)
--- a/src/gallium/drivers/radeon/radeon_llvm_emit.c
+++ b/src/gallium/drivers/radeon/radeon_llvm_emit.c
@@ -55,6 +55,13 @@ enum radeon_llvm_shader_type {
        RADEON_LLVM_SHADER_CS = 3,
 };
 
+enum radeon_llvm_calling_convention {
+       RADEON_LLVM_AMDGPU_VS = 87,
+       RADEON_LLVM_AMDGPU_GS = 88,
+       RADEON_LLVM_AMDGPU_PS = 89,
+       RADEON_LLVM_AMDGPU_CS = 90,
+};
+
 void radeon_llvm_add_attribute(LLVMValueRef F, const char *name, int value)
 {
        char str[16];
@@ -71,27 +78,35 @@ void radeon_llvm_add_attribute(LLVMValueRef F, const char *name, int value)
 void radeon_llvm_shader_type(LLVMValueRef F, unsigned type)
 {
        enum radeon_llvm_shader_type llvm_type;
+       enum radeon_llvm_calling_convention calling_conv;
 
        switch (type) {
        case TGSI_PROCESSOR_VERTEX:
        case TGSI_PROCESSOR_TESS_CTRL:
        case TGSI_PROCESSOR_TESS_EVAL:
                llvm_type = RADEON_LLVM_SHADER_VS;
+               calling_conv = RADEON_LLVM_AMDGPU_VS;
                break;
        case TGSI_PROCESSOR_GEOMETRY:
                llvm_type = RADEON_LLVM_SHADER_GS;
+               calling_conv = RADEON_LLVM_AMDGPU_GS;
                break;
        case TGSI_PROCESSOR_FRAGMENT:
                llvm_type = RADEON_LLVM_SHADER_PS;
+               calling_conv = RADEON_LLVM_AMDGPU_PS;
                break;
        case TGSI_PROCESSOR_COMPUTE:
                llvm_type = RADEON_LLVM_SHADER_CS;
+               calling_conv = RADEON_LLVM_AMDGPU_CS;
                break;
        default:
                assert(0);
        }
 
-       radeon_llvm_add_attribute(F, "ShaderType", llvm_type);
+       if (HAVE_LLVM >= 0x309)
+               LLVMSetFunctionCallConv(F, calling_conv);
+       else
+               radeon_llvm_add_attribute(F, "ShaderType", llvm_type);
 }
 
 static void init_r600_target()