From 63a5051ea6bf4d72a02594d21a3351e44bd70da7 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Mon, 6 Jan 2020 15:27:15 -0500
Subject: [PATCH] ac: set new LLVM denormal flags

See: https://reviews.llvm.org/D71358

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4196>
---
 src/amd/llvm/ac_llvm_build.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/amd/llvm/ac_llvm_build.c b/src/amd/llvm/ac_llvm_build.c
index 93e2e281213..dcbd4efeacf 100644
--- a/src/amd/llvm/ac_llvm_build.c
+++ b/src/amd/llvm/ac_llvm_build.c
@@ -4984,6 +4984,15 @@ ac_build_main(const struct ac_shader_args *args,
 	}
 
 	ctx->main_function = main_function;
+
+	if (LLVM_VERSION_MAJOR >= 11) {
+		/* Enable denormals for FP16 and FP64: */
+		LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math",
+						   "ieee,ieee");
+		/* Disable denormals for FP32: */
+		LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math-f32",
+						   "preserve-sign,preserve-sign");
+	}
 	return main_function;
 }
 
-- 
2.30.2