From f805153a25b00d12072bd728e91bb1621bfcf1b1 Mon Sep 17 00:00:00 2001
From: "A. Unique TensorFlower" <gardener@tensorflow.org>
Date: Fri, 19 Jun 2020 11:48:22 -0700
Subject: [PATCH] Fix regression that omitted -DNDEBUG in opt builds after
 toolchain refactoring.

Not adding -DNDEBUG leads to enabling assertions which makes LLVM often 10x slower.

PiperOrigin-RevId: 317349500
Change-Id: I52df6ab5013ad5a02101dd96f18220e054c3e94c
---
 third_party/gpus/crosstool/cc_toolchain_config.bzl.tpl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/third_party/gpus/crosstool/cc_toolchain_config.bzl.tpl b/third_party/gpus/crosstool/cc_toolchain_config.bzl.tpl
index 082ed950b04..eb320a94201 100644
--- a/third_party/gpus/crosstool/cc_toolchain_config.bzl.tpl
+++ b/third_party/gpus/crosstool/cc_toolchain_config.bzl.tpl
@@ -583,7 +583,11 @@ def _features(cpu, compiler, ctx):
                     ),
                 ],
             ),
-            feature(name = "opt"),
+            feature(name = "disable-assertions"),
+            feature(
+                name = "opt",
+                implies = ["disable-assertions"],
+            ),
             feature(name = "fastbuild"),
             feature(name = "dbg"),
             feature(name = "supports_dynamic_linker", enabled = True),