Because of issue rust-lang#8, pass -O1 to llc instead of -O0.

DiamondLovesYou · DiamondLovesYou · commit f55ec51e5521 · 2014-08-08T15:24:59.000-05:00
diff --git a/src/compiletest/runtest.rs b/src/compiletest/runtest.rs
@@ -1640,7 +1640,7 @@ fn pnacl_exec_compiled_test(config: &Config, props: &TestProps,
         "x86" => ("i686", false),
         _ => (ARCH, true),
     };
-    let mut pnacl_trans_args = vec!("-O0".to_string());
+    let mut pnacl_trans_args = vec!("-O1".to_string());
     if tls_use_call {
         pnacl_trans_args.push("-mtls-use-call".to_string());
     }

Original file line number	Diff line number	Diff line change
`@@ -1640,7 +1640,7 @@ fn pnacl_exec_compiled_test(config: &Config, props: &TestProps,`
`1640`	`1640`	`"x86" => ("i686", false),`
`1641`	`1641`	`_ => (ARCH, true),`
`1642`	`1642`	`};`
`1643`		`- let mut pnacl_trans_args = vec!("-O0".to_string());`
	`1643`	`+ let mut pnacl_trans_args = vec!("-O1".to_string());`
`1644`	`1644`	`if tls_use_call {`
`1645`	`1645`	`pnacl_trans_args.push("-mtls-use-call".to_string());`
`1646`	`1646`	`}`