Rollup merge of #72893 - RalfJung:unleash-tls, r=ecstatic-morse

test miri-unleash TLS accesses

Finally gets rid of `IS_SUPPORTED_IN_MIRI`. :-)

I also added a test for the new `asm!` while I am at it.

r? @ecstatic-morse Cc @rust-lang/wg-const-eval

src/test/ui/consts/miri_unleashed/inline_asm.rs

@@ -1,15 +1,22 @@
 // compile-flags: -Zunleash-the-miri-inside-of-you
 // only-x86_64
-#![feature(llvm_asm)]
+#![feature(asm,llvm_asm)]
 #![allow(const_err)]
 
 fn main() {}
 
 // Make sure we catch executing inline assembly.
-static TEST_BAD: () = {
+static TEST_BAD1: () = {
     unsafe { llvm_asm!("xor %eax, %eax" ::: "eax"); }
     //~^ ERROR could not evaluate static initializer
     //~| NOTE inline assembly is not supported
     //~| NOTE in this expansion of llvm_asm!
     //~| NOTE in this expansion of llvm_asm!
 };
+
+// Make sure we catch executing inline assembly.
+static TEST_BAD2: () = {
+    unsafe { asm!("nop"); }
+    //~^ ERROR could not evaluate static initializer
+    //~| NOTE inline assembly is not supported
+};

src/test/ui/consts/miri_unleashed/inline_asm.stderr

@@ -6,6 +6,12 @@ LL |     unsafe { llvm_asm!("xor %eax, %eax" ::: "eax"); }
    |
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
+error[E0080]: could not evaluate static initializer
+  --> $DIR/inline_asm.rs:19:14
+   |
+LL |     unsafe { asm!("nop"); }
+   |              ^^^^^^^^^^^^ inline assembly is not supported
+
 warning: skipping const checks
    |
 help: skipping check that does not even have a feature gate
@@ -13,8 +19,13 @@ help: skipping check that does not even have a feature gate
    |
 LL |     unsafe { llvm_asm!("xor %eax, %eax" ::: "eax"); }
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/inline_asm.rs:19:14
+   |
+LL |     unsafe { asm!("nop"); }
+   |              ^^^^^^^^^^^^
    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to 2 previous errors; 1 warning emitted
 
 For more information about this error, try `rustc --explain E0080`.

src/test/ui/consts/miri_unleashed/tls.rs

@@ -0,0 +1,17 @@
+// compile-flags: -Zunleash-the-miri-inside-of-you
+#![feature(thread_local)]
+#![allow(const_err)]
+
+use std::thread;
+
+#[thread_local]
+static A: u8 = 0;
+
+// Make sure we catch accessing thread-local storage.
+static TEST_BAD: () = {
+    unsafe { let _val = A; }
+    //~^ ERROR could not evaluate static initializer
+    //~| NOTE cannot access thread local static
+};
+
+fn main() {}

src/test/ui/consts/miri_unleashed/tls.stderr

@@ -0,0 +1,17 @@
+error[E0080]: could not evaluate static initializer
+  --> $DIR/tls.rs:12:25
+   |
+LL |     unsafe { let _val = A; }
+   |                         ^ cannot access thread local static (DefId(0:4 ~ tls[317d]::A[0]))
+
+warning: skipping const checks
+   |
+help: skipping check that does not even have a feature gate
+  --> $DIR/tls.rs:12:25
+   |
+LL |     unsafe { let _val = A; }
+   |                         ^
+
+error: aborting due to previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0080`.