Support use of asm goto with outputs and `options(noreturn)`

When labels are present, the `noreturn` option really means that asm block
won't fallthrough -- if labels are present, then outputs can still be
meaningfully used.

1 files changed, 11 insertions, 1 deletions

diff --git a/tests/codegen/asm/goto.rs b/tests/codegen/asm/goto.rs
index 0e69c4d5840..3193d3aa145 100644
--- a/tests/codegen/asm/goto.rs
+++ b/tests/codegen/asm/goto.rs
@@ -43,11 +43,21 @@ pub unsafe fn asm_goto_with_outputs_use_in_label() -> u64 {
 // CHECK-LABEL: @asm_goto_noreturn
 #[no_mangle]
 pub unsafe fn asm_goto_noreturn() -> u64 {
-    let out: u64;
     // CHECK: callbr void asm sideeffect alignstack inteldialect "
     // CHECK-NEXT: to label %unreachable [label %[[JUMPBB:[a-b0-9]+]]]
     asm!("jmp {}", label { return 1; }, options(noreturn));
     // CHECK: [[JUMPBB]]:
     // CHECK-NEXT: ret i64 1
+}
+
+// CHECK-LABEL: @asm_goto_noreturn_with_outputs
+#[no_mangle]
+pub unsafe fn asm_goto_noreturn_with_outputs() -> u64 {
+    let out: u64;
+    // CHECK: [[RES:%[0-9]+]] = callbr i64 asm sideeffect alignstack inteldialect "
+    // CHECK-NEXT: to label %[[FALLTHROUGHBB:[a-b0-9]+]] [label %[[JUMPBB:[a-b0-9]+]]]
+    asm!("mov {}, 1", "jmp {}", out(reg) out, label { return out; });
+    // CHECK: [[JUMPBB]]:
+    // CHECK-NEXT: ret i64 [[RES]]
     out
 }