diff --git a/library/compiler-builtins/.travis.yml b/library/compiler-builtins/.travis.yml
index 898a600eb417..efd0b1738e3e 100644
--- a/library/compiler-builtins/.travis.yml
+++ b/library/compiler-builtins/.travis.yml
@@ -28,6 +28,11 @@ matrix:
     - env: TARGET=x86_64-apple-darwin
       os: osx
     - env: TARGET=x86_64-unknown-linux-gnu
+  allow_failures:
+    - env: TARGET=thumbv6m-linux-eabi
+    - env: TARGET=thumbv7em-linux-eabi
+    - env: TARGET=thumbv7em-linux-eabihf
+    - env: TARGET=thumbv7m-linux-eabi
 
 install:
   - case $TARGET in
diff --git a/library/compiler-builtins/compiler-rt b/library/compiler-builtins/compiler-rt
index dfd960b5f1a1..54d95ca0bd60 160000
--- a/library/compiler-builtins/compiler-rt
+++ b/library/compiler-builtins/compiler-rt
@@ -1 +1 @@
-Subproject commit dfd960b5f1a1751b22738fa34fd27b583f4618db
+Subproject commit 54d95ca0bd603c322601a61255898e2b8d2a3cae