From: Marek Olšák <marek.olsak@amd.com>
Date: Tue, 6 May 2014 11:57:31 +0000 (+0200)
Subject: radeon/llvm: add support for non-scalar system values
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bd2df40a848c2641c70fed5e1a452938dd8eb7cb;p=mesa.git

radeon/llvm: add support for non-scalar system values

The sample position is one of them.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
---

diff --git a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
index 60ade78b5f2..f8be0df94cf 100644
--- a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
+++ b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
@@ -218,7 +218,13 @@ static LLVMValueRef fetch_system_value(
 	unsigned swizzle)
 {
 	struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);
+	struct gallivm_state *gallivm = bld_base->base.gallivm;
+
 	LLVMValueRef cval = ctx->system_values[reg->Register.Index];
+	if (LLVMGetTypeKind(LLVMTypeOf(cval)) == LLVMVectorTypeKind) {
+		cval = LLVMBuildExtractElement(gallivm->builder, cval,
+					       lp_build_const_int32(gallivm, swizzle), "");
+	}
 	return bitcast(bld_base, type, cval);
 }