https://gitlab.freedesktop.org/mesa/mesa/commit/39d0c68321df

--- src/amd/common/ac_llvm_build.c.orig	2019-01-17 11:26:22 UTC

+++ src/amd/common/ac_llvm_build.c

@@ -401,8 +401,9 @@ ac_build_optimization_barrier(struct ac_llvm_context *

 LLVMValueRef

 ac_build_shader_clock(struct ac_llvm_context *ctx)

 {

-	LLVMValueRef tmp = ac_build_intrinsic(ctx, "llvm.readcyclecounter",

-					      ctx->i64, NULL, 0, 0);

+	const char *intr = HAVE_LLVM >= 0x0900 && ctx->chip_class >= VI ?

+				"llvm.amdgcn.s.memrealtime" : "llvm.readcyclecounter";

+	LLVMValueRef tmp = ac_build_intrinsic(ctx, intr, ctx->i64, NULL, 0, 0);

 	return LLVMBuildBitCast(ctx->builder, tmp, ctx->v2i32, "");

 }

https://gitlab.freedesktop.org/mesa/mesa/commit/dded2edf8bed

--- src/gallium/auxiliary/gallivm/lp_bld_arit.c.orig	2019-01-17 11:26:22 UTC

+++ src/gallium/auxiliary/gallivm/lp_bld_arit.c

@@ -555,6 +555,12 @@ lp_build_add(struct lp_build_context *bld,

         return bld->one;

       if (!type.floating && !type.fixed) {

+         if (HAVE_LLVM >= 0x0900) {

+            char intrin[32];

+            intrinsic = type.sign ? "llvm.sadd.sat" : "llvm.uadd.sat";

+            lp_format_intrinsic(intrin, sizeof intrin, intrinsic, bld->vec_type);

+            return lp_build_intrinsic_binary(builder, intrin, bld->vec_type, a, b);

+         }

          if (type.width * type.length == 128) {

             if (util_cpu_caps.has_sse2) {

                if (type.width == 8)

@@ -625,6 +631,7 @@ lp_build_add(struct lp_build_context *bld,

           * NOTE: cmp/select does sext/trunc of the mask. Does not seem to

           * interfere with llvm's ability to recognize the pattern but seems

           * a bit brittle.

+          * NOTE: llvm 9+ always uses (non arch specific) intrinsic.

           */

          LLVMValueRef overflowed = lp_build_cmp(bld, PIPE_FUNC_GREATER, a, res);

          res = lp_build_select(bld, overflowed,

@@ -876,6 +883,12 @@ lp_build_sub(struct lp_build_context *bld,

         return bld->zero;

       if (!type.floating && !type.fixed) {

+         if (HAVE_LLVM >= 0x0900) {

+            char intrin[32];

+            intrinsic = type.sign ? "llvm.ssub.sat" : "llvm.usub.sat";

+            lp_format_intrinsic(intrin, sizeof intrin, intrinsic, bld->vec_type);

+            return lp_build_intrinsic_binary(builder, intrin, bld->vec_type, a, b);

+         }

          if (type.width * type.length == 128) {

             if (util_cpu_caps.has_sse2) {

                if (type.width == 8)

@@ -925,6 +938,7 @@ lp_build_sub(struct lp_build_context *bld,

           * NOTE: cmp/select does sext/trunc of the mask. Does not seem to

           * interfere with llvm's ability to recognize the pattern but seems

           * a bit brittle.

+          * NOTE: llvm 9+ always uses (non arch specific) intrinsic.

           */

          LLVMValueRef no_ov = lp_build_cmp(bld, PIPE_FUNC_GREATER, a, b);

          a = lp_build_select(bld, no_ov, a, b);