Merge remote-tracking branch 'upstream/master' into fast-swap

14 files changed, 525 insertions, 13 deletions

diff --git a/src/test/codegen/align-struct.rs b/src/test/codegen/align-struct.rs
new file mode 100644
index 00000000000..d4828be037a
--- /dev/null
+++ b/src/test/codegen/align-struct.rs
@@ -0,0 +1,57 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes
+#![crate_type = "lib"]
+
+#![feature(attr_literals)]
+#![feature(repr_align)]
+
+#[repr(align(64))]
+pub struct Align64(i32);
+
+pub struct Nested64 {
+    a: Align64,
+    b: i32,
+    c: i32,
+    d: i8,
+}
+
+pub enum Enum64 {
+    A(Align64),
+    B(i32),
+}
+
+// CHECK-LABEL: @align64
+#[no_mangle]
+pub fn align64(i : i32) -> Align64 {
+// CHECK: %a64 = alloca %Align64, align 64
+// CHECK: call void @llvm.memcpy.{{.*}}(i8* %{{.*}}, i8* %{{.*}}, i{{[0-9]+}} 64, i32 64, i1 false)
+    let a64 = Align64(i);
+    a64
+}
+
+// CHECK-LABEL: @nested64
+#[no_mangle]
+pub fn nested64(a: Align64, b: i32, c: i32, d: i8) -> Nested64 {
+// CHECK: %n64 = alloca %Nested64, align 64
+// CHECK: %a = alloca %Align64, align 64
+    let n64 = Nested64 { a, b, c, d };
+    n64
+}
+
+// CHECK-LABEL: @enum64
+#[no_mangle]
+pub fn enum64(a: Align64) -> Enum64 {
+// CHECK: %e64 = alloca %Enum64, align 64
+// CHECK: %a = alloca %Align64, align 64
+    let e64 = Enum64::A(a);
+    e64
+}
diff --git a/src/test/codegen/drop.rs b/src/test/codegen/drop.rs
index a4bd5cf2c15..d7e2cb6d9a5 100644
--- a/src/test/codegen/drop.rs
+++ b/src/test/codegen/drop.rs
@@ -36,7 +36,7 @@ pub fn droppy() {
 // CHECK-NOT: call{{.*}}drop{{.*}}SomeUniqueName
 // CHECK: invoke{{.*}}drop{{.*}}SomeUniqueName
 // CHECK: invoke{{.*}}drop{{.*}}SomeUniqueName
-// CHECK: invoke{{.*}}drop{{.*}}SomeUniqueName
+// CHECK: call{{.*}}drop{{.*}}SomeUniqueName
 // CHECK-NOT: {{(call|invoke).*}}drop{{.*}}SomeUniqueName
 // The next line checks for the } that ends the function definition
 // CHECK-LABEL: {{^[}]}}
diff --git a/src/test/codegen/foo.s b/src/test/codegen/foo.s
new file mode 100644
index 00000000000..304d82aa0c6
--- /dev/null
+++ b/src/test/codegen/foo.s
@@ -0,0 +1,3 @@
+.global foo
+foo:
+    jmp baz
diff --git a/src/test/codegen/function-arguments.rs b/src/test/codegen/function-arguments.rs
index 76313b158ab..bc84ac49da9 100644
--- a/src/test/codegen/function-arguments.rs
+++ b/src/test/codegen/function-arguments.rs
@@ -121,13 +121,13 @@ pub fn unsafe_slice(_: &[UnsafeInner]) {
 fn str(_: &[u8]) {
 }
 
-// CHECK: @trait_borrow(i8* nonnull, void (i8*)** noalias nonnull readonly)
+// CHECK: @trait_borrow({}* nonnull, {}* noalias nonnull readonly)
 // FIXME #25759 This should also have `nocapture`
 #[no_mangle]
 fn trait_borrow(_: &Drop) {
 }
 
-// CHECK: @trait_box(i8* noalias nonnull, void (i8*)** noalias nonnull readonly)
+// CHECK: @trait_box({}* noalias nonnull, {}* noalias nonnull readonly)
 #[no_mangle]
 fn trait_box(_: Box<Drop>) {
 }
diff --git a/src/test/codegen/global_asm.rs b/src/test/codegen/global_asm.rs
new file mode 100644
index 00000000000..5bd0c1b4076
--- /dev/null
+++ b/src/test/codegen/global_asm.rs
@@ -0,0 +1,73 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// this regex will capture the correct unconditional branch inst.
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+global_asm!(r#"
+    .global foo
+foo:
+    jmp baz
+"#);
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}
diff --git a/src/test/codegen/global_asm_include.rs b/src/test/codegen/global_asm_include.rs
new file mode 100644
index 00000000000..401b1fad566
--- /dev/null
+++ b/src/test/codegen/global_asm_include.rs
@@ -0,0 +1,68 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+global_asm!(include_str!("foo.s"));
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}
diff --git a/src/test/codegen/global_asm_x2.rs b/src/test/codegen/global_asm_x2.rs
new file mode 100644
index 00000000000..8b59165e9e6
--- /dev/null
+++ b/src/test/codegen/global_asm_x2.rs
@@ -0,0 +1,90 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+#[no_std]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+// any other global_asm will be appended to this first block, so:
+// CHECK-LABEL: bar
+// CHECK: module asm "{{[[:space:]]+}}jmp quux"
+global_asm!(r#"
+    .global foo
+foo:
+    jmp baz
+"#);
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}
+
+// no checks here; this has been appended to the first occurrence
+global_asm!(r#"
+    .global bar
+bar:
+    jmp quux
+"#);
+
+extern "C" {
+    fn bar();
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn quux() {}
diff --git a/src/test/codegen/move-val-init.rs b/src/test/codegen/move-val-init.rs
new file mode 100644
index 00000000000..98b7db60b68
--- /dev/null
+++ b/src/test/codegen/move-val-init.rs
@@ -0,0 +1,29 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(core_intrinsics)]
+#![crate_type = "lib"]
+
+// test that `move_val_init` actually avoids big allocas
+
+use std::intrinsics::move_val_init;
+
+pub struct Big {
+    pub data: [u8; 65536]
+}
+
+// CHECK-LABEL: @test_mvi
+#[no_mangle]
+pub unsafe fn test_mvi(target: *mut Big, make_big: fn() -> Big) {
+    // CHECK: call void %1(%Big*{{[^%]*}} %0)
+    move_val_init(target, make_big());
+}
diff --git a/src/test/codegen/naked-functions.rs b/src/test/codegen/naked-functions.rs
index 9de74f72005..9883ca6b35d 100644
--- a/src/test/codegen/naked-functions.rs
+++ b/src/test/codegen/naked-functions.rs
@@ -20,7 +20,8 @@
 #[no_mangle]
 #[naked]
 fn naked_empty() {
-    // CHECK: ret void
+    // CHECK-NEXT: {{.+}}:
+    // CHECK-NEXT: ret void
 }
 
 // CHECK: Function Attrs: naked uwtable
@@ -28,9 +29,10 @@ fn naked_empty() {
 #[naked]
 // CHECK-NEXT: define internal void @naked_with_args(i{{[0-9]+}})
 fn naked_with_args(a: isize) {
-    // CHECK: %a = alloca i{{[0-9]+}}
-    // CHECK: ret void
+    // CHECK-NEXT: {{.+}}:
+    // CHECK-NEXT: %a = alloca i{{[0-9]+}}
     &a; // keep variable in an alloca
+    // CHECK: ret void
 }
 
 // CHECK: Function Attrs: naked uwtable
@@ -38,7 +40,8 @@ fn naked_with_args(a: isize) {
 #[no_mangle]
 #[naked]
 fn naked_with_return() -> isize {
-    // CHECK: ret i{{[0-9]+}} 0
+    // CHECK-NEXT: {{.+}}:
+    // CHECK-NEXT: ret i{{[0-9]+}} 0
     0
 }
 
@@ -47,9 +50,10 @@ fn naked_with_return() -> isize {
 #[no_mangle]
 #[naked]
 fn naked_with_args_and_return(a: isize) -> isize {
-    // CHECK: %a = alloca i{{[0-9]+}}
-    // CHECK: ret i{{[0-9]+}} %{{[0-9]+}}
+    // CHECK-NEXT: {{.+}}:
+    // CHECK-NEXT: %a = alloca i{{[0-9]+}}
     &a; // keep variable in an alloca
+    // CHECK: ret i{{[0-9]+}} %{{[0-9]+}}
     a
 }
 
@@ -58,14 +62,37 @@ fn naked_with_args_and_return(a: isize) -> isize {
 #[no_mangle]
 #[naked]
 fn naked_recursive() {
-    // CHECK: call void @naked_empty()
+    // CHECK-NEXT: {{.+}}:
+    // CHECK-NEXT: call void @naked_empty()
+
+    // FIXME(#39685) Avoid one block per call.
+    // CHECK-NEXT: br label %bb1
+    // CHECK: bb1:
+
     naked_empty();
-    // CHECK: %{{[0-9]+}} = call i{{[0-9]+}} @naked_with_return()
+
+    // CHECK-NEXT: %{{[0-9]+}} = call i{{[0-9]+}} @naked_with_return()
+
+    // FIXME(#39685) Avoid one block per call.
+    // CHECK-NEXT: br label %bb2
+    // CHECK: bb2:
+
+    // CHECK-NEXT: %{{[0-9]+}} = call i{{[0-9]+}} @naked_with_args_and_return(i{{[0-9]+}} %{{[0-9]+}})
+
+    // FIXME(#39685) Avoid one block per call.
+    // CHECK-NEXT: br label %bb3
+    // CHECK: bb3:
+
+    // CHECK-NEXT: call void @naked_with_args(i{{[0-9]+}} %{{[0-9]+}})
+
+    // FIXME(#39685) Avoid one block per call.
+    // CHECK-NEXT: br label %bb4
+    // CHECK: bb4:
+
     naked_with_args(
-        // CHECK: %{{[0-9]+}} = call i{{[0-9]+}} @naked_with_args_and_return(i{{[0-9]+}} %{{[0-9]+}})
         naked_with_args_and_return(
-            // CHECK: call void @naked_with_args(i{{[0-9]+}} %{{[0-9]+}})
             naked_with_return()
         )
     );
+    // CHECK-NEXT: ret void
 }
diff --git a/src/test/codegen/packed.rs b/src/test/codegen/packed.rs
index db2cd3b4165..99e6e38a3bf 100644
--- a/src/test/codegen/packed.rs
+++ b/src/test/codegen/packed.rs
@@ -27,3 +27,36 @@ pub fn write_pkd(pkd: &mut Packed) -> u32 {
     pkd.data = 42;
     result
 }
+
+pub struct Array([i32; 8]);
+#[repr(packed)]
+pub struct BigPacked {
+    dealign: u8,
+    data: Array
+}
+
+// CHECK-LABEL: @call_pkd
+#[no_mangle]
+pub fn call_pkd(f: fn() -> Array) -> BigPacked {
+// CHECK: [[ALLOCA:%[_a-z0-9]+]] = alloca %Array
+// CHECK: call void %{{.*}}(%Array* noalias nocapture sret dereferenceable(32) [[ALLOCA]])
+// CHECK: call void @llvm.memcpy.{{.*}}(i8* %{{.*}}, i8* %{{.*}}, i{{[0-9]+}} 32, i32 1, i1 false)
+    // check that calls whose destination is a field of a packed struct
+    // go through an alloca rather than calling the function with an
+    // unaligned destination.
+    BigPacked { dealign: 0, data: f() }
+}
+
+#[repr(packed)]
+#[derive(Copy, Clone)]
+pub struct PackedPair(u8, u32);
+
+// CHECK-LABEL: @pkd_pair
+#[no_mangle]
+pub fn pkd_pair(pair1: &mut PackedPair, pair2: &mut PackedPair) {
+    // CHECK: [[V1:%[a-z0-9]+]] = load i8, i8* %{{.*}}, align 1
+    // CHECK: [[V2:%[a-z0-9]+]] = load i32, i32* %{{.*}}, align 1
+    // CHECK: store i8 [[V1]], i8* {{.*}}, align 1
+    // CHECK: store i32 [[V2]], i32* {{.*}}, align 1
+    *pair2 = *pair1;
+}
diff --git a/src/test/codegen/panic-abort-windows.rs b/src/test/codegen/panic-abort-windows.rs
new file mode 100644
index 00000000000..2ab15277084
--- /dev/null
+++ b/src/test/codegen/panic-abort-windows.rs
@@ -0,0 +1,41 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-tidy-linelength
+
+// This test is for *-windows-msvc only.
+// ignore-android
+// ignore-bitrig
+// ignore-macos
+// ignore-dragonfly
+// ignore-freebsd
+// ignore-haiku
+// ignore-ios
+// ignore-linux
+// ignore-netbsd
+// ignore-openbsd
+// ignore-solaris
+// ignore-emscripten
+
+// compile-flags: -C no-prepopulate-passes -C panic=abort -O
+
+#![crate_type = "lib"]
+
+// CHECK: Function Attrs: uwtable
+// CHECK-NEXT: define void @normal_uwtable()
+#[no_mangle]
+pub fn normal_uwtable() {
+}
+
+// CHECK: Function Attrs: nounwind uwtable
+// CHECK-NEXT: define void @extern_uwtable()
+#[no_mangle]
+pub extern fn extern_uwtable() {
+}
diff --git a/src/test/codegen/personality_lifetimes.rs b/src/test/codegen/personality_lifetimes.rs
new file mode 100644
index 00000000000..9fd600b32e6
--- /dev/null
+++ b/src/test/codegen/personality_lifetimes.rs
@@ -0,0 +1,42 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-msvc
+
+// compile-flags: -O -C no-prepopulate-passes
+
+#![crate_type="lib"]
+
+struct S;
+
+impl Drop for S {
+    fn drop(&mut self) {
+    }
+}
+
+fn might_unwind() {
+}
+
+// CHECK-LABEL: @test
+#[no_mangle]
+pub fn test() {
+    let _s = S;
+    // Check that the personality slot alloca gets a lifetime start in each cleanup block, not just
+    // in the first one.
+    // CHECK-LABEL: cleanup:
+    // CHECK: bitcast{{.*}}personalityslot
+    // CHECK-NEXT: call void @llvm.lifetime.start
+    // CHECK-LABEL: cleanup1:
+    // CHECK: bitcast{{.*}}personalityslot
+    // CHECK-NEXT: call void @llvm.lifetime.start
+    might_unwind();
+    let _t = S;
+    might_unwind();
+}
diff --git a/src/test/codegen/remap_path_prefix/auxiliary/remap_path_prefix_aux.rs b/src/test/codegen/remap_path_prefix/auxiliary/remap_path_prefix_aux.rs
new file mode 100644
index 00000000000..5543a091680
--- /dev/null
+++ b/src/test/codegen/remap_path_prefix/auxiliary/remap_path_prefix_aux.rs
@@ -0,0 +1,18 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-tidy-linelength
+
+// compile-flags: -g  -Zremap-path-prefix-from={{cwd}} -Zremap-path-prefix-to=/the/aux-cwd -Zremap-path-prefix-from={{src-base}}/remap_path_prefix/auxiliary -Zremap-path-prefix-to=/the/aux-src
+
+#[inline]
+pub fn some_aux_function() -> i32 {
+    1234
+}
diff --git a/src/test/codegen/remap_path_prefix/main.rs b/src/test/codegen/remap_path_prefix/main.rs
new file mode 100644
index 00000000000..eb00c91ba5f
--- /dev/null
+++ b/src/test/codegen/remap_path_prefix/main.rs
@@ -0,0 +1,31 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-windows
+// ignore-tidy-linelength
+
+// compile-flags: -g  -C no-prepopulate-passes -Zremap-path-prefix-from={{cwd}} -Zremap-path-prefix-to=/the/cwd -Zremap-path-prefix-from={{src-base}} -Zremap-path-prefix-to=/the/src
+// aux-build:remap_path_prefix_aux.rs
+
+extern crate remap_path_prefix_aux;
+
+// Here we check that the expansion of the file!() macro is mapped.
+// CHECK: internal constant [34 x i8] c"/the/src/remap_path_prefix/main.rs"
+pub static FILE_PATH: &'static str = file!();
+
+fn main() {
+    remap_path_prefix_aux::some_aux_function();
+}
+
+// Here we check that local debuginfo is mapped correctly.
+// CHECK: !DIFile(filename: "/the/src/remap_path_prefix/main.rs", directory: "/the/cwd")
+
+// And here that debuginfo from other crates are expanded to absolute paths.
+// CHECK: !DIFile(filename: "/the/aux-src/remap_path_prefix_aux.rs", directory: "")