From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Wed, 24 Jan 2018 22:26:18 +0000 (+0100)
Subject: ac/nir: set the noalias attribute on input pointers
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b453f38a47d12fb5600472367f0bde2d6a403098;p=mesa.git

ac/nir: set the noalias attribute on input pointers

This attribute is similar to the definition of restrict in
C99 and it might help LLVM.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
---

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 5b8c346d005..6833439cc12 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -326,6 +326,7 @@ create_llvm_function(LLVMContextRef ctx, LLVMModuleRef module,
 		if (args->array_params_mask & (1 << i)) {
 			LLVMValueRef P = LLVMGetParam(main_function, i);
 			ac_add_function_attr(ctx, main_function, i + 1, AC_FUNC_ATTR_BYVAL);
+			ac_add_function_attr(ctx, main_function, i + 1, AC_FUNC_ATTR_NOALIAS);
 			ac_add_attr_dereferenceable(P, UINT64_MAX);
 		}
 		else {