Rollup merge of #65151 - tmandry:revert-emscripten-upgrade, r=tmandry

Revert #63649 - "Upgrade Emscripten targets to use upstream LLVM backend"

This change caused the runtime of the linux-asmjs builder to nearly double from 2+ hours to about 4 hours, which happens to be the bors timeout. (It made it in barely under 4 hours when it was merged.) This is causing timeouts on all new changes.

This reverts commit 7870050796e5904a0fc85ecbe6fa6dde1cfe0c91, reversing
changes made to 2e7244807a7878f6eca3eb7d97ae9b413aa49014.

4 files changed, 9 insertions, 23 deletions

diff --git a/src/liballoc/tests/binary_heap.rs b/src/liballoc/tests/binary_heap.rs
index b8c720264d0..0685fa943c0 100644
--- a/src/liballoc/tests/binary_heap.rs
+++ b/src/liballoc/tests/binary_heap.rs
@@ -1,5 +1,10 @@
+use std::cmp;
 use std::collections::BinaryHeap;
 use std::collections::binary_heap::{Drain, PeekMut};
+use std::panic::{self, AssertUnwindSafe};
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+use rand::{thread_rng, seq::SliceRandom};
 
 #[test]
 fn test_iterator() {
@@ -276,15 +281,9 @@ fn assert_covariance() {
 // even if the order may not be correct.
 //
 // Destructors must be called exactly once per element.
-// FIXME: re-enable emscripten once it can unwind again
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))] // Miri does not support catching panics
+#[cfg(not(miri))] // Miri does not support catching panics
 fn panic_safe() {
-    use std::cmp;
-    use std::panic::{self, AssertUnwindSafe};
-    use std::sync::atomic::{AtomicUsize, Ordering};
-    use rand::{thread_rng, seq::SliceRandom};
-
     static DROP_COUNTER: AtomicUsize = AtomicUsize::new(0);
 
     #[derive(Eq, PartialEq, Ord, Clone, Debug)]
diff --git a/src/liballoc/tests/str.rs b/src/liballoc/tests/str.rs
index cb73c7c179c..4332b2e90fd 100644
--- a/src/liballoc/tests/str.rs
+++ b/src/liballoc/tests/str.rs
@@ -483,7 +483,7 @@ mod slice_index {
     }
 
     #[test]
-    #[cfg(not(target_os = "emscripten"))] // hits an OOM
+    #[cfg(not(target_arch = "asmjs"))] // hits an OOM
     #[cfg(not(miri))] // Miri is too slow
     fn simple_big() {
         fn a_million_letter_x() -> String {
diff --git a/src/liballoc/tests/str.rs.rej b/src/liballoc/tests/str.rs.rej
deleted file mode 100644
index abcba0c2e84..00000000000
--- a/src/liballoc/tests/str.rs.rej
+++ /dev/null
@@ -1,10 +0,0 @@
-diff a/src/liballoc/tests/str.rs b/src/liballoc/tests/str.rs	(rejected hunks)
-@@ -483,7 +483,7 @@ mod slice_index {
-     }
- 
-     #[test]
--    #[cfg(not(target_arch = "asmjs"))] // hits an OOM
-+    #[cfg(not(target_arch = "js"))] // hits an OOM
-     #[cfg(not(miri))] // Miri is too slow
-     fn simple_big() {
-         fn a_million_letter_x() -> String {
diff --git a/src/liballoc/tests/vec.rs b/src/liballoc/tests/vec.rs
index 80537217697..98d013dfa2b 100644
--- a/src/liballoc/tests/vec.rs
+++ b/src/liballoc/tests/vec.rs
@@ -944,10 +944,8 @@ fn drain_filter_complex() {
     }
 }
 
-// Miri does not support catching panics
-// FIXME: re-enable emscripten once it can unwind again
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))]
+#[cfg(not(miri))] // Miri does not support catching panics
 fn drain_filter_consumed_panic() {
     use std::rc::Rc;
     use std::sync::Mutex;
@@ -997,9 +995,8 @@ fn drain_filter_consumed_panic() {
     }
 }
 
-// FIXME: Re-enable emscripten once it can catch panics
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))] // Miri does not support catching panics
+#[cfg(not(miri))] // Miri does not support catching panics
 fn drain_filter_unconsumed_panic() {
     use std::rc::Rc;
     use std::sync::Mutex;