Test all supported LLVM versions at once

Previously, testing all supported configurations required installing
many different versions of rustc manually. Now, it only requires running
`cargo test --all-features`.

This introduces a dependency on `rustup`. It also introduces a
dependency on `cargo-binutils` with 166 merged. Note that PR has not yet
been merged at time of writing.

By default, this only tests LLVM 20, which is the latest version
currently available on stable rust.

Author: jyn514

.github/workflows/ci.yml

@@ -10,11 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version:
-          - 1.82.0
-          - stable
-          - beta
-          - nightly 
         target:
           - x86_64-unknown-linux-gnu
           - x86_64-unknown-linux-musl
@@ -23,7 +18,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ matrix.version }}
+          toolchain: "1.90"
           override: true
           components: rustfmt, llvm-tools-preview
       - name: build
@@ -32,17 +27,15 @@ jobs:
           cargo check --all-features
       - name: test
         run: |
-          cargo install cargo-binutils@0.3.6
+          # TODO: use a published version, or at least a merged branch
+          cargo install --git https://github.com/jyn514/cargo-binutils/ --branch metadata
           cargo test 
       - name: check formatting
         run: cargo fmt -- --check
   windows:
     runs-on: windows-latest
     strategy:
       matrix:
-        version:
-          - stable
-          - nightly
         target:
           - x86_64-pc-windows-gnu
           - x86_64-pc-windows-msvc
@@ -51,7 +44,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ matrix.version }}
+          toolchain: "1.90"
           override: true
           components: llvm-tools-preview
       - name: test
@@ -62,17 +55,15 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        version:
-          - stable
-          - nightly
         target:
           - x86_64-apple-darwin	
+          - aarch64-apple-darwin	
       fail-fast: false
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ matrix.version }}
+          toolchain: "1.90"
           override: true
           components: llvm-tools-preview
       - name: test

Cargo.toml

@@ -10,13 +10,28 @@ license = "Apache-2.0"
 categories = ["encoding"]
 keywords = ["coverage", "llvm"]
 exclude = ["tests/*", ".github/*", "benches/*"]
-build = "build.rs"
 rust-version = "1.80.0"
 
 [features]
-default = ["cli"]
+default = ["cli", "__llvm_20"]
 cli = ["structopt", "tracing-subscriber"]
 
+# for testing
+# to run all tests, run `cargo test --all-features`.
+# to run a specific version, run `cargo test --no-default-features --featurs __llvm_XX`.
+# by default, only runs tests again llvm 20
+__llvm_11 = []
+__llvm_12 = []
+__llvm_13 = []
+__llvm_14 = []
+__llvm_15 = []
+__llvm_16 = []
+__llvm_17 = []
+__llvm_18 = []
+__llvm_19 = []
+__llvm_20 = []
+__llvm_21 = []
+
 [dependencies]
 anyhow = "1.0.65"
 flate2 = "1.0"

build.rs

@@ -284,15 +284,12 @@ impl ShowCommand {
             }
         }
         if profile.get_level() == InstrumentationLevel::Ir {
-            // This is just to enable same printout in older versions with llvm 11
-            #[cfg(not(llvm_11))]
             println!(
                 "Instrumentation level: {}  entry_first = {}",
                 profile.get_level(),
+                // NOTE: in llvm 11 this is always false
                 profile.is_entry_first() as usize
             );
-            #[cfg(llvm_11)]
-            println!("Instrumentation level: {}", profile.get_level());
         } else {
             println!("Instrumentation level: {}", profile.get_level());
         }

src/bin/profparser.rs

@@ -267,7 +267,6 @@ impl InstrProfReader for TextInstrProf {
             } else if check_tag(name, ENTRY_TAG) {
                 entry_first = true;
             } else if !check_tag(name, FE_TAG) {
-                // return Err(Err::Failure(Error::new(bytes, ErrorKind::Tag)));
                 return Err(Err::Failure(VerboseError::from_error_kind(
                     bytes,
                     ErrorKind::Tag,