Auto merge of #67900 - nikic:prepare-llvm-10, r=nagisa

Prepare for LLVM 10 upgrade

Split off from #67759, this just adds the necessary compatibility bits and updates codegen tests, without performing the actual LLVM upgrade.

r? @alexcrichton

Author: bors

src/libprofiler_builtins/build.rs

@@ -21,7 +21,6 @@ fn main() {
         "InstrProfilingPlatformLinux.c",
         "InstrProfilingPlatformOther.c",
         "InstrProfilingPlatformWindows.c",
-        "InstrProfilingRuntime.cc",
         "InstrProfilingUtil.c",
         "InstrProfilingValue.c",
         "InstrProfilingWriter.c",
@@ -68,10 +67,17 @@ fn main() {
     let root = env::var_os("RUST_COMPILER_RT_ROOT").unwrap();
     let root = Path::new(&root);
 
+    let src_root = root.join("lib").join("profile");
     for src in profile_sources {
-        cfg.file(root.join("lib").join("profile").join(src));
+        cfg.file(src_root.join(src));
     }
 
+    // The file was renamed in LLVM 10.
+    let old_runtime_path = src_root.join("InstrProfilingRuntime.cc");
+    let new_runtime_path = src_root.join("InstrProfilingRuntime.cpp");
+    cfg.file(if old_runtime_path.exists() { old_runtime_path } else { new_runtime_path });
+
+    cfg.include(root.join("include"));
     cfg.warnings(false);
     cfg.compile("profiler-rt");
 }

src/librustc_codegen_llvm/context.rs

@@ -143,6 +143,10 @@ fn strip_function_ptr_alignment(data_layout: String) -> String {
     data_layout.replace("-Fi8-", "-")
 }
 
+fn strip_x86_address_spaces(data_layout: String) -> String {
+    data_layout.replace("-p270:32:32-p271:32:32-p272:64:64-", "-")
+}
+
 pub unsafe fn create_module(
     tcx: TyCtxt<'_>,
     llcx: &'ll llvm::Context,
@@ -156,6 +160,11 @@ pub unsafe fn create_module(
     if llvm_util::get_major_version() < 9 {
         target_data_layout = strip_function_ptr_alignment(target_data_layout);
     }
+    if llvm_util::get_major_version() < 10 {
+        if sess.target.target.arch == "x86" || sess.target.target.arch == "x86_64" {
+            target_data_layout = strip_x86_address_spaces(target_data_layout);
+        }
+    }
 
     // Ensure the data-layout values hardcoded remain the defaults.
     if sess.target.target.options.is_builtin {

src/librustc_target/spec/i386_apple_ios.rs

@@ -8,7 +8,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128".to_string(),
+        data_layout: "e-m:o-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:128-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "ios".to_string(),
         target_env: String::new(),

src/librustc_target/spec/i686_apple_darwin.rs

@@ -20,7 +20,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128".to_string(),
+        data_layout: "e-m:o-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:128-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "macos".to_string(),
         target_env: String::new(),

src/librustc_target/spec/i686_linux_android.rs

@@ -18,7 +18,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:32-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "android".to_string(),
         target_env: String::new(),

src/librustc_target/spec/i686_pc_windows_gnu.rs

@@ -18,7 +18,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32".to_string(),
+        data_layout: "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            i64:64-f80:32-n8:16:32-a:0:32-S32"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "windows".to_string(),
         target_env: "gnu".to_string(),

src/librustc_target/spec/i686_pc_windows_msvc.rs

@@ -19,7 +19,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32".to_string(),
+        data_layout: "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            i64:64-f80:32-n8:16:32-a:0:32-S32"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "windows".to_string(),
         target_env: "msvc".to_string(),

src/librustc_target/spec/i686_unknown_cloudabi.rs

@@ -13,7 +13,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:32-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "cloudabi".to_string(),
         target_env: String::new(),

src/librustc_target/spec/i686_unknown_freebsd.rs

@@ -12,7 +12,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:32-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "freebsd".to_string(),
         target_env: String::new(),

src/librustc_target/spec/i686_unknown_haiku.rs

@@ -12,7 +12,9 @@ pub fn target() -> TargetResult {
         target_endian: "little".to_string(),
         target_pointer_width: "32".to_string(),
         target_c_int_width: "32".to_string(),
-        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:32-n8:16:32-S128"
+            .to_string(),
         arch: "x86".to_string(),
         target_os: "haiku".to_string(),
         target_env: String::new(),