Support more projections in custom mir

7 files changed, 151 insertions, 0 deletions

diff --git a/src/test/mir-opt/building/custom/projections.rs b/src/test/mir-opt/building/custom/projections.rs
new file mode 100644
index 00000000000..5e472e531c7
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.rs
@@ -0,0 +1,85 @@
+#![feature(custom_mir, core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::mir::*;
+
+union U {
+    a: i32,
+    b: u32,
+}
+
+// EMIT_MIR projections.unions.built.after.mir
+#[custom_mir(dialect = "built")]
+fn unions(u: U) -> i32 {
+    mir!({
+        RET = u.a;
+        Return()
+    })
+}
+
+// EMIT_MIR projections.tuples.built.after.mir
+#[custom_mir(dialect = "analysis", phase = "post-cleanup")]
+fn tuples(i: (u32, i32)) -> (u32, i32) {
+    mir!(
+        // FIXME(JakobDegen): This is necessary because we can't give type hints for `RET`
+        let temp: (u32, i32);
+        {
+            temp.0 = i.0;
+            temp.1 = i.1;
+
+            RET = temp;
+            Return()
+        }
+    )
+}
+
+// EMIT_MIR projections.unwrap.built.after.mir
+#[custom_mir(dialect = "built")]
+fn unwrap(opt: Option<i32>) -> i32 {
+    mir!({
+        RET = Field(Variant(opt, 1), 0);
+        Return()
+    })
+}
+
+// EMIT_MIR projections.unwrap_deref.built.after.mir
+#[custom_mir(dialect = "built")]
+fn unwrap_deref(opt: Option<&i32>) -> i32 {
+    mir!({
+        RET = *Field::<&i32>(Variant(opt, 1), 0);
+        Return()
+    })
+}
+
+// EMIT_MIR projections.set.built.after.mir
+#[custom_mir(dialect = "built")]
+fn set(opt: &mut Option<i32>) {
+    mir!({
+        place!(Field(Variant(*opt, 1), 0)) = 10;
+        Return()
+    })
+}
+
+// EMIT_MIR projections.simple_index.built.after.mir
+#[custom_mir(dialect = "built")]
+fn simple_index(a: [i32; 10], b: &[i32]) -> i32 {
+    mir!({
+        let temp = 3;
+        RET = a[temp];
+        RET = (*b)[temp];
+        Return()
+    })
+}
+
+fn main() {
+    assert_eq!(unions(U { a: 5 }), 5);
+    assert_eq!(tuples((5, 6)), (5, 6));
+
+    assert_eq!(unwrap(Some(5)), 5);
+    assert_eq!(unwrap_deref(Some(&5)), 5);
+    let mut o = Some(5);
+    set(&mut o);
+    assert_eq!(o, Some(10));
+
+    assert_eq!(simple_index([0; 10], &[0; 10]), 0);
+}
diff --git a/src/test/mir-opt/building/custom/projections.set.built.after.mir b/src/test/mir-opt/building/custom/projections.set.built.after.mir
new file mode 100644
index 00000000000..2f15176a61f
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.set.built.after.mir
@@ -0,0 +1,10 @@
+// MIR for `set` after built
+
+fn set(_1: &mut Option<i32>) -> () {
+    let mut _0: ();                      // return place in scope 0 at $DIR/projections.rs:+0:31: +0:31
+
+    bb0: {
+        (((*_1) as variant#1).0: i32) = const 10_i32; // scope 0 at $DIR/projections.rs:+2:9: +2:48
+        return;                          // scope 0 at $DIR/projections.rs:+3:9: +3:17
+    }
+}
diff --git a/src/test/mir-opt/building/custom/projections.simple_index.built.after.mir b/src/test/mir-opt/building/custom/projections.simple_index.built.after.mir
new file mode 100644
index 00000000000..fc422e4b3f0
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.simple_index.built.after.mir
@@ -0,0 +1,13 @@
+// MIR for `simple_index` after built
+
+fn simple_index(_1: [i32; 10], _2: &[i32]) -> i32 {
+    let mut _0: i32;                     // return place in scope 0 at $DIR/projections.rs:+0:45: +0:48
+    let mut _3: usize;                   // in scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
+
+    bb0: {
+        _3 = const 3_usize;              // scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
+        _0 = _1[_3];                     // scope 0 at $DIR/projections.rs:+3:9: +3:22
+        _0 = (*_2)[_3];                  // scope 0 at $DIR/projections.rs:+4:9: +4:25
+        return;                          // scope 0 at $DIR/projections.rs:+5:9: +5:17
+    }
+}
diff --git a/src/test/mir-opt/building/custom/projections.tuples.built.after.mir b/src/test/mir-opt/building/custom/projections.tuples.built.after.mir
new file mode 100644
index 00000000000..65487d3c9ed
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.tuples.built.after.mir
@@ -0,0 +1,13 @@
+// MIR for `tuples` after built
+
+fn tuples(_1: (u32, i32)) -> (u32, i32) {
+    let mut _0: (u32, i32);              // return place in scope 0 at $DIR/projections.rs:+0:29: +0:39
+    let mut _2: (u32, i32);              // in scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
+
+    bb0: {
+        (_2.0: u32) = (_1.0: u32);       // scope 0 at $DIR/projections.rs:+5:13: +5:25
+        (_2.1: i32) = (_1.1: i32);       // scope 0 at $DIR/projections.rs:+6:13: +6:25
+        _0 = _2;                         // scope 0 at $DIR/projections.rs:+8:13: +8:23
+        return;                          // scope 0 at $DIR/projections.rs:+9:13: +9:21
+    }
+}
diff --git a/src/test/mir-opt/building/custom/projections.unions.built.after.mir b/src/test/mir-opt/building/custom/projections.unions.built.after.mir
new file mode 100644
index 00000000000..922538a5f17
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.unions.built.after.mir
@@ -0,0 +1,10 @@
+// MIR for `unions` after built
+
+fn unions(_1: U) -> i32 {
+    let mut _0: i32;                     // return place in scope 0 at $DIR/projections.rs:+0:20: +0:23
+
+    bb0: {
+        _0 = (_1.0: i32);                // scope 0 at $DIR/projections.rs:+2:9: +2:18
+        return;                          // scope 0 at $DIR/projections.rs:+3:9: +3:17
+    }
+}
diff --git a/src/test/mir-opt/building/custom/projections.unwrap.built.after.mir b/src/test/mir-opt/building/custom/projections.unwrap.built.after.mir
new file mode 100644
index 00000000000..75b03a3c393
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.unwrap.built.after.mir
@@ -0,0 +1,10 @@
+// MIR for `unwrap` after built
+
+fn unwrap(_1: Option<i32>) -> i32 {
+    let mut _0: i32;                     // return place in scope 0 at $DIR/projections.rs:+0:32: +0:35
+
+    bb0: {
+        _0 = ((_1 as variant#1).0: i32); // scope 0 at $DIR/projections.rs:+2:9: +2:40
+        return;                          // scope 0 at $DIR/projections.rs:+3:9: +3:17
+    }
+}
diff --git a/src/test/mir-opt/building/custom/projections.unwrap_deref.built.after.mir b/src/test/mir-opt/building/custom/projections.unwrap_deref.built.after.mir
new file mode 100644
index 00000000000..c6b0f7efa9b
--- /dev/null
+++ b/src/test/mir-opt/building/custom/projections.unwrap_deref.built.after.mir
@@ -0,0 +1,10 @@
+// MIR for `unwrap_deref` after built
+
+fn unwrap_deref(_1: Option<&i32>) -> i32 {
+    let mut _0: i32;                     // return place in scope 0 at $DIR/projections.rs:+0:39: +0:42
+
+    bb0: {
+        _0 = (*((_1 as variant#1).0: &i32)); // scope 0 at $DIR/projections.rs:+2:9: +2:49
+        return;                          // scope 0 at $DIR/projections.rs:+3:9: +3:17
+    }
+}