Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/tests/mir-opt/simplify_locals.rs b/tests/mir-opt/simplify_locals.rs
new file mode 100644
index 000000000..7bbc0481c
--- /dev/null
+++ b/tests/mir-opt/simplify_locals.rs
@@ -0,0 +1,81 @@
+// unit-test: SimplifyLocals-before-const-prop
+
+
+#![feature(thread_local)]
+
+#[derive(Copy, Clone)]
+enum E {
+     A,
+     B,
+}
+
+// EMIT_MIR simplify_locals.c.SimplifyLocals-before-const-prop.diff
+fn c() {
+    let bytes = [0u8; 10];
+    // Unused cast
+    let _: &[u8] = &bytes;
+}
+
+// EMIT_MIR simplify_locals.d1.SimplifyLocals-before-const-prop.diff
+fn d1() {
+    // Unused set discriminant
+    let _ = E::A;
+}
+
+// EMIT_MIR simplify_locals.d2.SimplifyLocals-before-const-prop.diff
+fn d2() {
+    // Unused set discriminant
+    {(10, E::A)}.1 = E::B;
+}
+
+// EMIT_MIR simplify_locals.r.SimplifyLocals-before-const-prop.diff
+fn r() {
+    let mut a = 1;
+    // Unused references
+    let _ = &a;
+    let _ = &mut a;
+}
+
+#[thread_local] static mut X: u32 = 0;
+
+// EMIT_MIR simplify_locals.t1.SimplifyLocals-before-const-prop.diff
+fn t1() {
+    // Unused thread local
+    unsafe { X };
+}
+
+// EMIT_MIR simplify_locals.t2.SimplifyLocals-before-const-prop.diff
+fn t2() {
+    // Unused thread local
+    unsafe { &mut X };
+}
+
+// EMIT_MIR simplify_locals.t3.SimplifyLocals-before-const-prop.diff
+fn t3() {
+    // Unused thread local
+    unsafe { *&mut X };
+}
+
+// EMIT_MIR simplify_locals.t4.SimplifyLocals-before-const-prop.diff
+fn t4() -> u32 {
+    // Used thread local
+    unsafe { X + 1 }
+}
+
+// EMIT_MIR simplify_locals.expose_addr.SimplifyLocals-before-const-prop.diff
+fn expose_addr(p: *const usize) {
+    // Used pointer to address cast. Has a side effect of exposing the provenance.
+    p as usize;
+}
+
+fn main() {
+    c();
+    d1();
+    d2();
+    r();
+    t1();
+    t2();
+    t3();
+    t4();
+    expose_addr(&0);
+}