Importing rustc-1.49.0

Bug: 176888219
Change-Id: Ib0805d37e7b485cd420bbff8a8b000cf87e7ede0

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index af3f3e7..8b15c8b 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -5,8 +5,9 @@
 
 use super::debuginfo::{
     DIArray, DIBasicType, DIBuilder, DICompositeType, DIDerivedType, DIDescriptor, DIEnumerator,
-    DIFile, DIFlags, DIGlobalVariableExpression, DILexicalBlock, DINameSpace, DISPFlags, DIScope,
-    DISubprogram, DISubrange, DITemplateTypeParameter, DIType, DIVariable, DebugEmissionKind,
+    DIFile, DIFlags, DIGlobalVariableExpression, DILexicalBlock, DILocation, DINameSpace,
+    DISPFlags, DIScope, DISubprogram, DISubrange, DITemplateTypeParameter, DIType, DIVariable,
+    DebugEmissionKind,
 };
 
 use libc::{c_char, c_int, c_uint, size_t};
@@ -557,6 +558,7 @@
     None,
     MD5,
     SHA1,
+    SHA256,
 }
 
 extern "C" {
@@ -794,6 +796,7 @@
     pub struct DIBuilder<'a>(InvariantOpaque<'a>);
 
     pub type DIDescriptor = Metadata;
+    pub type DILocation = Metadata;
     pub type DIScope = DIDescriptor;
     pub type DIFile = DIScope;
     pub type DILexicalBlock = DIScope;
@@ -1854,7 +1857,7 @@
         ScopeLine: c_uint,
         Flags: DIFlags,
         SPFlags: DISPFlags,
-        Fn: &'a Value,
+        MaybeFn: Option<&'a Value>,
         TParam: &'a DIArray,
         Decl: Option<&'a DIDescriptor>,
     ) -> &'a DISubprogram;
@@ -2005,7 +2008,7 @@
         VarInfo: &'a DIVariable,
         AddrOps: *const i64,
         AddrOpsCount: c_uint,
-        DL: &'a Value,
+        DL: &'a DILocation,
         InsertAtEnd: &'a BasicBlock,
     ) -> &'a Value;
 
@@ -2093,8 +2096,8 @@
         Line: c_uint,
         Column: c_uint,
         Scope: &'a DIScope,
-        InlinedAt: Option<&'a Metadata>,
-    ) -> &'a Value;
+        InlinedAt: Option<&'a DILocation>,
+    ) -> &'a DILocation;
     pub fn LLVMRustDIBuilderCreateOpDeref() -> i64;
     pub fn LLVMRustDIBuilderCreateOpPlusUconst() -> i64;
 
@@ -2362,4 +2365,10 @@
         bytecode_len: usize,
     ) -> bool;
     pub fn LLVMRustLinkerFree(linker: &'a mut Linker<'a>);
+    #[allow(improper_ctypes)]
+    pub fn LLVMRustComputeLTOCacheKey(
+        key_out: &RustString,
+        mod_id: *const c_char,
+        data: &ThinLTOData,
+    );
 }