Auto merge of #87570 - nikic:llvm-13, r=nagisa

Upgrade to LLVM 13

Work in progress update to LLVM 13. Main changes:

 * InlineAsm diagnostics reported using SrcMgr diagnostic kind are now handled. Previously these used a separate diag handler.
 * Codegen tests are updated for additional attributes.
 * Some data layouts have changed.
 * Switch `#[used]` attribute from `llvm.used` to `llvm.compiler.used` to avoid SHF_GNU_RETAIN flag introduced in https://reviews.llvm.org/D97448, which appears to trigger a bug in older versions of gold.
 * Set `LLVM_INCLUDE_TESTS=OFF` to avoid Python 3.6 requirement.

Upstream issues:

 * ~~https://bugs.llvm.org/show_bug.cgi?id=51210 (InlineAsm diagnostic reporting for module asm)~~ Fixed by https://github.com/llvm/llvm-project/commit/1558bb80c01b695ce12642527cbfccf16cf54ece.
 * ~~https://bugs.llvm.org/show_bug.cgi?id=51476 (Miscompile on AArch64 due to incorrect comparison elimination)~~ Fixed by https://github.com/llvm/llvm-project/commit/81b106584f2baf33e09be2362c35c1bf2f6bfe94.
 * https://bugs.llvm.org/show_bug.cgi?id=51207 (Can't set custom section flags anymore). Problematic change reverted in our fork, https://reviews.llvm.org/D107216 posted for upstream revert.
 * https://bugs.llvm.org/show_bug.cgi?id=51211 (Regression in codegen for #83623). This is an optimization regression that we may likely have to eat for this release. The fix for #83623 was based on an incorrect premise, and this needs to be properly addressed in the MergeICmps pass.

The [compile-time impact](https://perf.rust-lang.org/compare.html?start=ef9549b6c0efb7525c9b012148689c8d070f9bc0&end=0983094463497eec22d550dad25576a894687002) is mixed, but quite positive as LLVM upgrades go.

The LLVM 13 final release is scheduled for Sep 21st. The current nightly is scheduled for stable release on Oct 21st.

r? `@ghost`

9 files changed, 9 insertions, 9 deletions

diff --git a/compiler/rustc_target/src/spec/powerpc64_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/powerpc64_unknown_linux_gnu.rs
index 559a1a40868..f10d4d49bb9 100644
--- a/compiler/rustc_target/src/spec/powerpc64_unknown_linux_gnu.rs
+++ b/compiler/rustc_target/src/spec/powerpc64_unknown_linux_gnu.rs
@@ -14,7 +14,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "powerpc64-unknown-linux-gnu".to_string(),
         pointer_width: 64,
-        data_layout: "E-m:e-i64:64-n32:64-v256:256:256-v512:512:512".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512".to_string(),
         arch: "powerpc64".to_string(),
         options: TargetOptions { endian: Endian::Big, mcount: "_mcount".to_string(), ..base },
     }
diff --git a/compiler/rustc_target/src/spec/powerpc64_unknown_linux_musl.rs b/compiler/rustc_target/src/spec/powerpc64_unknown_linux_musl.rs
index f1190b159ab..611621727bd 100644
--- a/compiler/rustc_target/src/spec/powerpc64_unknown_linux_musl.rs
+++ b/compiler/rustc_target/src/spec/powerpc64_unknown_linux_musl.rs
@@ -10,7 +10,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "powerpc64-unknown-linux-musl".to_string(),
         pointer_width: 64,
-        data_layout: "E-m:e-i64:64-n32:64-v256:256:256-v512:512:512".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512".to_string(),
         arch: "powerpc64".to_string(),
         options: TargetOptions { endian: Endian::Big, mcount: "_mcount".to_string(), ..base },
     }
diff --git a/compiler/rustc_target/src/spec/powerpc64_wrs_vxworks.rs b/compiler/rustc_target/src/spec/powerpc64_wrs_vxworks.rs
index 3ebc5469e0a..9c63997ce2f 100644
--- a/compiler/rustc_target/src/spec/powerpc64_wrs_vxworks.rs
+++ b/compiler/rustc_target/src/spec/powerpc64_wrs_vxworks.rs
@@ -10,7 +10,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "powerpc64-unknown-linux-gnu".to_string(),
         pointer_width: 64,
-        data_layout: "E-m:e-i64:64-n32:64-v256:256:256-v512:512:512".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512".to_string(),
         arch: "powerpc64".to_string(),
         options: TargetOptions { endian: Endian::Big, ..base },
     }
diff --git a/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_gnu.rs
index 76f70e474f0..f645eceadfe 100644
--- a/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_gnu.rs
+++ b/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_gnu.rs
@@ -9,7 +9,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "powerpc64le-unknown-linux-gnu".to_string(),
         pointer_width: 64,
-        data_layout: "e-m:e-i64:64-n32:64-v256:256:256-v512:512:512".to_string(),
+        data_layout: "e-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512".to_string(),
         arch: "powerpc64".to_string(),
         options: TargetOptions { mcount: "_mcount".to_string(), ..base },
     }
diff --git a/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_musl.rs b/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_musl.rs
index 42c49103b3b..934371fb221 100644
--- a/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_musl.rs
+++ b/compiler/rustc_target/src/spec/powerpc64le_unknown_linux_musl.rs
@@ -9,7 +9,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "powerpc64le-unknown-linux-musl".to_string(),
         pointer_width: 64,
-        data_layout: "e-m:e-i64:64-n32:64-v256:256:256-v512:512:512".to_string(),
+        data_layout: "e-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512".to_string(),
         arch: "powerpc64".to_string(),
         options: TargetOptions { mcount: "_mcount".to_string(), ..base },
     }
diff --git a/compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs b/compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs
index 302139395d3..86b1a755233 100644
--- a/compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs
+++ b/compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs
@@ -43,7 +43,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-unknown-emscripten".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-f128:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm32".to_string(),
         options: opts,
     }
diff --git a/compiler/rustc_target/src/spec/wasm32_unknown_unknown.rs b/compiler/rustc_target/src/spec/wasm32_unknown_unknown.rs
index 834c4dbfc05..134c6803b15 100644
--- a/compiler/rustc_target/src/spec/wasm32_unknown_unknown.rs
+++ b/compiler/rustc_target/src/spec/wasm32_unknown_unknown.rs
@@ -54,7 +54,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-unknown-unknown".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm32".to_string(),
         options,
     }
diff --git a/compiler/rustc_target/src/spec/wasm32_wasi.rs b/compiler/rustc_target/src/spec/wasm32_wasi.rs
index a6b12d2ee8f..2dab206dc76 100644
--- a/compiler/rustc_target/src/spec/wasm32_wasi.rs
+++ b/compiler/rustc_target/src/spec/wasm32_wasi.rs
@@ -109,7 +109,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-wasi".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm32".to_string(),
         options,
     }
diff --git a/compiler/rustc_target/src/spec/wasm64_unknown_unknown.rs b/compiler/rustc_target/src/spec/wasm64_unknown_unknown.rs
index 8bfb229d77f..fb6526c0e72 100644
--- a/compiler/rustc_target/src/spec/wasm64_unknown_unknown.rs
+++ b/compiler/rustc_target/src/spec/wasm64_unknown_unknown.rs
@@ -32,7 +32,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm64-unknown-unknown".to_string(),
         pointer_width: 64,
-        data_layout: "e-m:e-p:64:64-i64:64-n32:64-S128".to_string(),
+        data_layout: "e-m:e-p:64:64-i64:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm64".to_string(),
         options,
     }