Auto merge of #62592 - nikic:actually-update-llvm, r=alexcrichton

Update to LLVM 9 trunk

Following the preparatory changes in #62474, this updates the LLVM submodule to https://github.com/rust-lang/llvm-project/tree/rustc/9.0-2019-07-12 and:

 * Changes the LLVM Rust bindings to account for the new SubtargetSubTypeKV.
 * Adjusts a codegen test for the new form of the byval attribute that takes a type.
 * Makes a PGO codegen test more liberal with regard to order and linkage.
 * Builds InstrProfilingPlatformWindows.c as part of libprofiler_builtins.
 * Moves registration of additional passes (in particular sanitizers) to the end of the module pass manager.
 * Disables LLDB on builders.

r? @alexcrichton

8 files changed, 88 insertions, 56 deletions

diff --git a/src/ci/docker/x86_64-gnu-debug/Dockerfile b/src/ci/docker/x86_64-gnu-debug/Dockerfile
index 3ac1d2ac90b..b2748d9c2ab 100644
--- a/src/ci/docker/x86_64-gnu-debug/Dockerfile
+++ b/src/ci/docker/x86_64-gnu-debug/Dockerfile
@@ -33,7 +33,6 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --enable-debug \
       --enable-lld \
-      --enable-lldb \
       --enable-optimize \
       --set llvm.use-linker=lld \
       --set target.x86_64-unknown-linux-gnu.linker=clang \
diff --git a/src/libprofiler_builtins/build.rs b/src/libprofiler_builtins/build.rs
index 0b2bda577d7..775f84535fb 100644
--- a/src/libprofiler_builtins/build.rs
+++ b/src/libprofiler_builtins/build.rs
@@ -19,6 +19,7 @@ fn main() {
                                    "InstrProfilingPlatformDarwin.c",
                                    "InstrProfilingPlatformLinux.c",
                                    "InstrProfilingPlatformOther.c",
+                                   "InstrProfilingPlatformWindows.c",
                                    "InstrProfilingRuntime.cc",
                                    "InstrProfilingUtil.c",
                                    "InstrProfilingValue.c",
diff --git a/src/librustc_codegen_llvm/back/write.rs b/src/librustc_codegen_llvm/back/write.rs
index b135605cf02..253110dcb34 100644
--- a/src/librustc_codegen_llvm/back/write.rs
+++ b/src/librustc_codegen_llvm/back/write.rs
@@ -329,33 +329,55 @@ pub(crate) unsafe fn optimize(cgcx: &CodegenContext<LlvmCodegenBackend>,
         let mpm = llvm::LLVMCreatePassManager();
 
         {
-            // If we're verifying or linting, add them to the function pass
-            // manager.
-            let addpass = |pass_name: &str| {
+            let find_pass = |pass_name: &str| {
                 let pass_name = SmallCStr::new(pass_name);
-                let pass = match llvm::LLVMRustFindAndCreatePass(pass_name.as_ptr()) {
-                    Some(pass) => pass,
-                    None => return false,
-                };
-                let pass_manager = match llvm::LLVMRustPassKind(pass) {
-                    llvm::PassKind::Function => &*fpm,
-                    llvm::PassKind::Module => &*mpm,
-                    llvm::PassKind::Other => {
-                        diag_handler.err("Encountered LLVM pass kind we can't handle");
-                        return true
-                    },
-                };
-                llvm::LLVMRustAddPass(pass_manager, pass);
-                true
+                llvm::LLVMRustFindAndCreatePass(pass_name.as_ptr())
             };
 
-            if config.verify_llvm_ir { assert!(addpass("verify")); }
+            if config.verify_llvm_ir {
+                // Verification should run as the very first pass.
+                llvm::LLVMRustAddPass(fpm, find_pass("verify").unwrap());
+            }
+
+            let mut extra_passes = Vec::new();
+            let mut have_name_anon_globals_pass = false;
+
+            for pass_name in &config.passes {
+                if pass_name == "lint" {
+                    // Linting should also be performed early, directly on the generated IR.
+                    llvm::LLVMRustAddPass(fpm, find_pass("lint").unwrap());
+                    continue;
+                }
+
+                if let Some(pass) = find_pass(pass_name) {
+                    extra_passes.push(pass);
+                } else {
+                    diag_handler.warn(&format!("unknown pass `{}`, ignoring", pass_name));
+                }
+
+                if pass_name == "name-anon-globals" {
+                    have_name_anon_globals_pass = true;
+                }
+            }
+
+            for pass_name in &cgcx.plugin_passes {
+                if let Some(pass) = find_pass(pass_name) {
+                    extra_passes.push(pass);
+                } else {
+                    diag_handler.err(&format!("a plugin asked for LLVM pass \
+                                               `{}` but LLVM does not \
+                                               recognize it", pass_name));
+                }
+
+                if pass_name == "name-anon-globals" {
+                    have_name_anon_globals_pass = true;
+                }
+            }
 
             // Some options cause LLVM bitcode to be emitted, which uses ThinLTOBuffers, so we need
             // to make sure we run LLVM's NameAnonGlobals pass when emitting bitcode; otherwise
             // we'll get errors in LLVM.
             let using_thin_buffers = config.bitcode_needed();
-            let mut have_name_anon_globals_pass = false;
             if !config.no_prepopulate_passes {
                 llvm::LLVMRustAddAnalysisPasses(tm, fpm, llmod);
                 llvm::LLVMRustAddAnalysisPasses(tm, mpm, llmod);
@@ -364,34 +386,22 @@ pub(crate) unsafe fn optimize(cgcx: &CodegenContext<LlvmCodegenBackend>,
                 let prepare_for_thin_lto = cgcx.lto == Lto::Thin || cgcx.lto == Lto::ThinLocal ||
                     (cgcx.lto != Lto::Fat && cgcx.opts.cg.linker_plugin_lto.enabled());
                 with_llvm_pmb(llmod, &config, opt_level, prepare_for_thin_lto, &mut |b| {
+                    llvm::LLVMRustAddLastExtensionPasses(
+                        b, extra_passes.as_ptr(), extra_passes.len() as size_t);
                     llvm::LLVMPassManagerBuilderPopulateFunctionPassManager(b, fpm);
                     llvm::LLVMPassManagerBuilderPopulateModulePassManager(b, mpm);
                 });
 
                 have_name_anon_globals_pass = have_name_anon_globals_pass || prepare_for_thin_lto;
                 if using_thin_buffers && !prepare_for_thin_lto {
-                    assert!(addpass("name-anon-globals"));
-                    have_name_anon_globals_pass = true;
-                }
-            }
-
-            for pass in &config.passes {
-                if !addpass(pass) {
-                    diag_handler.warn(&format!("unknown pass `{}`, ignoring", pass));
-                }
-                if pass == "name-anon-globals" {
+                    llvm::LLVMRustAddPass(mpm, find_pass("name-anon-globals").unwrap());
                     have_name_anon_globals_pass = true;
                 }
-            }
-
-            for pass in &cgcx.plugin_passes {
-                if !addpass(pass) {
-                    diag_handler.err(&format!("a plugin asked for LLVM pass \
-                                               `{}` but LLVM does not \
-                                               recognize it", pass));
-                }
-                if pass == "name-anon-globals" {
-                    have_name_anon_globals_pass = true;
+            } else {
+                // If we don't use the standard pipeline, directly populate the MPM
+                // with the extra passes.
+                for pass in extra_passes {
+                    llvm::LLVMRustAddPass(mpm, pass);
                 }
             }
 
diff --git a/src/librustc_codegen_llvm/llvm/ffi.rs b/src/librustc_codegen_llvm/llvm/ffi.rs
index 2b22925f449..5d82698d8ef 100644
--- a/src/librustc_codegen_llvm/llvm/ffi.rs
+++ b/src/librustc_codegen_llvm/llvm/ffi.rs
@@ -1668,6 +1668,9 @@ extern "C" {
     pub fn LLVMRustPassKind(Pass: &Pass) -> PassKind;
     pub fn LLVMRustFindAndCreatePass(Pass: *const c_char) -> Option<&'static mut Pass>;
     pub fn LLVMRustAddPass(PM: &PassManager<'_>, Pass: &'static mut Pass);
+    pub fn LLVMRustAddLastExtensionPasses(PMB: &PassManagerBuilder,
+                                          Passes: *const &'static mut Pass,
+                                          NumPasses: size_t);
 
     pub fn LLVMRustHasFeature(T: &TargetMachine, s: *const c_char) -> bool;
 
diff --git a/src/llvm-project b/src/llvm-project
-Subproject 6c1a545b269bc046743c6bb9b0173ec37bd624a
+Subproject f6446fa8e9629ffb1861303f17930c3aa83ef66
diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index cea88f14dcc..7d20086d9a2 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -99,6 +99,23 @@ void LLVMRustPassManagerBuilderPopulateThinLTOPassManager(
   unwrap(PMBR)->populateThinLTOPassManager(*unwrap(PMR));
 }
 
+extern "C"
+void LLVMRustAddLastExtensionPasses(
+    LLVMPassManagerBuilderRef PMBR, LLVMPassRef *Passes, size_t NumPasses) {
+  auto AddExtensionPasses = [Passes, NumPasses](
+      const PassManagerBuilder &Builder, PassManagerBase &PM) {
+    for (size_t I = 0; I < NumPasses; I++) {
+      PM.add(unwrap(Passes[I]));
+    }
+  };
+  // Add the passes to both of the pre-finalization extension points,
+  // so they are run for optimized and non-optimized builds.
+  unwrap(PMBR)->addExtension(PassManagerBuilder::EP_OptimizerLast,
+                             AddExtensionPasses);
+  unwrap(PMBR)->addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
+                             AddExtensionPasses);
+}
+
 #ifdef LLVM_COMPONENT_X86
 #define SUBTARGET_X86 SUBTARGET(X86)
 #else
@@ -266,8 +283,8 @@ static Optional<Reloc::Model> fromRust(LLVMRustRelocMode RustReloc) {
 
 #ifdef LLVM_RUSTLLVM
 /// getLongestEntryLength - Return the length of the longest entry in the table.
-///
-static size_t getLongestEntryLength(ArrayRef<SubtargetFeatureKV> Table) {
+template<typename KV>
+static size_t getLongestEntryLength(ArrayRef<KV> Table) {
   size_t MaxLen = 0;
   for (auto &I : Table)
     MaxLen = std::max(MaxLen, std::strlen(I.Key));
@@ -279,7 +296,7 @@ extern "C" void LLVMRustPrintTargetCPUs(LLVMTargetMachineRef TM) {
   const MCSubtargetInfo *MCInfo = Target->getMCSubtargetInfo();
   const Triple::ArchType HostArch = Triple(sys::getProcessTriple()).getArch();
   const Triple::ArchType TargetArch = Target->getTargetTriple().getArch();
-  const ArrayRef<SubtargetFeatureKV> CPUTable = MCInfo->getCPUTable();
+  const ArrayRef<SubtargetSubTypeKV> CPUTable = MCInfo->getCPUTable();
   unsigned MaxCPULen = getLongestEntryLength(CPUTable);
 
   printf("Available CPUs for this target:\n");
@@ -289,7 +306,7 @@ extern "C" void LLVMRustPrintTargetCPUs(LLVMTargetMachineRef TM) {
       MaxCPULen, "native", (int)HostCPU.size(), HostCPU.data());
   }
   for (auto &CPU : CPUTable)
-    printf("    %-*s - %s.\n", MaxCPULen, CPU.Key, CPU.Desc);
+    printf("    %-*s\n", MaxCPULen, CPU.Key);
   printf("\n");
 }
 
diff --git a/src/test/codegen/pgo-instrumentation.rs b/src/test/codegen/pgo-instrumentation.rs
index 8200cf4e016..c085f3c829e 100644
--- a/src/test/codegen/pgo-instrumentation.rs
+++ b/src/test/codegen/pgo-instrumentation.rs
@@ -5,10 +5,10 @@
 // compile-flags: -Cprofile-generate -Ccodegen-units=1 -Cpanic=abort
 
 // CHECK: @__llvm_profile_raw_version =
-// CHECK: @__profc_{{.*}}pgo_instrumentation{{.*}}some_function{{.*}} = private global
-// CHECK: @__profd_{{.*}}pgo_instrumentation{{.*}}some_function{{.*}} = private global
-// CHECK: @__profc_{{.*}}pgo_instrumentation{{.*}}some_other_function{{.*}} = private global
-// CHECK: @__profd_{{.*}}pgo_instrumentation{{.*}}some_other_function{{.*}} = private global
+// CHECK-DAG: @__profc_{{.*}}pgo_instrumentation{{.*}}some_function{{.*}} = {{.*}}global
+// CHECK-DAG: @__profd_{{.*}}pgo_instrumentation{{.*}}some_function{{.*}} = {{.*}}global
+// CHECK-DAG: @__profc_{{.*}}pgo_instrumentation{{.*}}some_other_function{{.*}} = {{.*}}global
+// CHECK-DAG: @__profd_{{.*}}pgo_instrumentation{{.*}}some_other_function{{.*}} = {{.*}}global
 // CHECK: @__llvm_profile_filename = {{.*}}"default_%m.profraw\00"{{.*}}
 
 #![crate_type="lib"]
diff --git a/src/test/codegen/repr-transparent-aggregates-1.rs b/src/test/codegen/repr-transparent-aggregates-1.rs
index e7c4b6193bc..1c8959619d3 100644
--- a/src/test/codegen/repr-transparent-aggregates-1.rs
+++ b/src/test/codegen/repr-transparent-aggregates-1.rs
@@ -1,11 +1,13 @@
 // compile-flags: -C no-prepopulate-passes
 // ignore-tidy-linelength
 
+// min-system-llvm-version: 9.0
 // ignore-arm
 // ignore-mips
 // ignore-mips64
 // ignore-powerpc
 // ignore-powerpc64
+// ignore-windows
 // See repr-transparent.rs
 
 #![feature(transparent_enums, transparent_unions)]
@@ -30,19 +32,19 @@ pub enum TeBigS {
     Variant(BigS),
 }
 
-// CHECK: define void @test_BigS(%BigS* [[BIGS_RET_ATTRS:.*]], %BigS* [[BIGS_ARG_ATTRS:.*]])
+// CHECK: define void @test_BigS(%BigS* [[BIGS_RET_ATTRS:.*]], %BigS* [[BIGS_ARG_ATTRS1:.*]] byval(%BigS) [[BIGS_ARG_ATTRS2:.*]])
 #[no_mangle]
 pub extern fn test_BigS(_: BigS) -> BigS { loop {} }
 
-// CHECK: define void @test_TsBigS(%TsBigS* [[BIGS_RET_ATTRS]], %TsBigS* [[BIGS_ARG_ATTRS]])
+// CHECK: define void @test_TsBigS(%TsBigS* [[BIGS_RET_ATTRS]], %TsBigS* [[BIGS_ARG_ATTRS1]] byval(%TsBigS) [[BIGS_ARG_ATTRS2:.*]])
 #[no_mangle]
 pub extern fn test_TsBigS(_: TsBigS) -> TsBigS { loop {} }
 
-// CHECK: define void @test_TuBigS(%TuBigS* [[BIGS_RET_ATTRS]], %TuBigS* [[BIGS_ARG_ATTRS]])
+// CHECK: define void @test_TuBigS(%TuBigS* [[BIGS_RET_ATTRS]], %TuBigS* [[BIGS_ARG_ATTRS1]] byval(%TuBigS) [[BIGS_ARG_ATTRS2:.*]])
 #[no_mangle]
 pub extern fn test_TuBigS(_: TuBigS) -> TuBigS { loop {} }
 
-// CHECK: define void @test_TeBigS(%"TeBigS::Variant"* [[BIGS_RET_ATTRS]], %"TeBigS::Variant"* [[BIGS_ARG_ATTRS]])
+// CHECK: define void @test_TeBigS(%"TeBigS::Variant"* [[BIGS_RET_ATTRS]], %"TeBigS::Variant"* [[BIGS_ARG_ATTRS1]] byval(%"TeBigS::Variant") [[BIGS_ARG_ATTRS2]])
 #[no_mangle]
 pub extern fn test_TeBigS(_: TeBigS) -> TeBigS { loop {} }
 
@@ -66,18 +68,18 @@ pub enum TeBigU {
     Variant(BigU),
 }
 
-// CHECK: define void @test_BigU(%BigU* [[BIGU_RET_ATTRS:.*]], %BigU* [[BIGU_ARG_ATTRS:.*]])
+// CHECK: define void @test_BigU(%BigU* [[BIGU_RET_ATTRS:.*]], %BigU* [[BIGU_ARG_ATTRS1:.*]] byval(%BigU) [[BIGU_ARG_ATTRS2:.*]])
 #[no_mangle]
 pub extern fn test_BigU(_: BigU) -> BigU { loop {} }
 
-// CHECK: define void @test_TsBigU(%TsBigU* [[BIGU_RET_ATTRS:.*]], %TsBigU* [[BIGU_ARG_ATTRS]])
+// CHECK: define void @test_TsBigU(%TsBigU* [[BIGU_RET_ATTRS:.*]], %TsBigU* [[BIGU_ARG_ATTRS1]] byval(%TsBigU) [[BIGU_ARG_ATTRS2]])
 #[no_mangle]
 pub extern fn test_TsBigU(_: TsBigU) -> TsBigU { loop {} }
 
-// CHECK: define void @test_TuBigU(%TuBigU* [[BIGU_RET_ATTRS]], %TuBigU* [[BIGU_ARG_ATTRS]])
+// CHECK: define void @test_TuBigU(%TuBigU* [[BIGU_RET_ATTRS]], %TuBigU* [[BIGU_ARG_ATTRS1]] byval(%TuBigU) [[BIGU_ARG_ATTRS2]])
 #[no_mangle]
 pub extern fn test_TuBigU(_: TuBigU) -> TuBigU { loop {} }
 
-// CHECK: define void @test_TeBigU(%"TeBigU::Variant"* [[BIGU_RET_ATTRS]], %"TeBigU::Variant"* [[BIGU_ARG_ATTRS]])
+// CHECK: define void @test_TeBigU(%"TeBigU::Variant"* [[BIGU_RET_ATTRS]], %"TeBigU::Variant"* [[BIGU_ARG_ATTRS1]] byval(%"TeBigU::Variant") [[BIGU_ARG_ATTRS2]])
 #[no_mangle]
 pub extern fn test_TeBigU(_: TeBigU) -> TeBigU { loop {} }