Merge pull request rust-lang#337 from rust-lang/fix/gep

Fix gep on pointers to non-number

failing-ui-tests.txt

@@ -14,7 +14,6 @@ tests/ui/sepcomp/sepcomp-fns-backwards.rs
 tests/ui/sepcomp/sepcomp-fns.rs
 tests/ui/sepcomp/sepcomp-statics.rs
 tests/ui/simd/intrinsic/generic-arithmetic-pass.rs
-tests/ui/target-feature/missing-plusminus.rs
 tests/ui/asm/x86_64/may_unwind.rs
 tests/ui/backtrace.rs
 tests/ui/catch-unwind-bang.rs

failing-ui-tests12.txt

@@ -37,3 +37,4 @@ tests/ui/simd/intrinsic/generic-gather-pass.rs
 tests/ui/simd/issue-85915-simd-ptrs.rs
 tests/ui/issues/issue-68010-large-zst-consts.rs
 tests/ui/rust-2018/proc-macro-crate-in-paths.rs
+tests/ui/target-feature/missing-plusminus.rs

src/builder.rs

@@ -922,6 +922,12 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         // require dereferencing the pointer.
         for index in indices {
             pointee_type = pointee_type.get_pointee().expect("pointee type");
+            #[cfg(feature="master")]
+            let pointee_size = {
+                let size = self.cx.context.new_sizeof(pointee_type);
+                self.context.new_cast(None, size, index.get_type())
+            };
+            #[cfg(not(feature="master"))]
             let pointee_size = self.context.new_rvalue_from_int(index.get_type(), pointee_type.get_size() as i32);
             result = result + self.gcc_int_cast(*index * pointee_size, self.sizet_type);
         }

src/gcc_util.rs

@@ -1,3 +1,4 @@
+#[cfg(feature="master")]
 use gccjit::Context;
 use smallvec::{smallvec, SmallVec};
 
@@ -202,11 +203,16 @@ fn handle_native(name: &str) -> &str {
         return name;
     }
 
-    // Get the native arch.
-    let context = Context::default();
-    context.get_target_info().arch().unwrap()
-        .to_str()
-        .unwrap()
+    #[cfg(feature="master")]
+    {
+        // Get the native arch.
+        let context = Context::default();
+        context.get_target_info().arch().unwrap()
+            .to_str()
+            .unwrap()
+    }
+    #[cfg(not(feature="master"))]
+    unimplemented!();
 }
 
 pub fn target_cpu(sess: &Session) -> &str {

test.sh

@@ -220,6 +220,7 @@ changelog-seen = 2
 [rust]
 codegen-backends = []
 deny-warnings = false
+verbose-tests = true
 
 [build]
 cargo = "$(rustup which cargo)"

tests/run/gep.rs

@@ -0,0 +1,10 @@
+// Compiler:
+//
+// Run-time:
+//   status: 0
+
+fn main() {
+    let mut value = (1, 1);
+    let ptr = &mut value as *mut (i32, i32);
+    println!("{:?}", ptr.wrapping_offset(10));
+}