Auto merge of rust-lang#77259 - dgbo:master, r=kennytm

bors · bors · commit 7b59d019642a · 2020-09-27T15:14:55.000Z
update stdarch submodule This commit update the src/stdarch submodule, we primarily want to include [https://github.com/rust-lang/stdarch/pull/918](url) which provides prefetch hints for aarch64. This PR could deliver ~20% performance gain on our aarch64 server in Filecoin. Wish this could be used as soon as possible. Thanks.
diff --git a/stdarch b/stdarch
@@ -1 +1 @@
-Subproject commit 718175b34a39e4e3d59b40e35930326edc515b87
+Subproject commit b422b0180f7c3327375a63a3e6660e432b9ec75d

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`@@ -1 +1 @@`
`1`		`-Subproject commit 718175b34a39e4e3d59b40e35930326edc515b87`
	`1`	`+Subproject commit b422b0180f7c3327375a63a3e6660e432b9ec75d`