ci: Test LLVM 20

Author: taiki-e

.github/workflows/ci.yml

@@ -161,6 +161,7 @@ jobs:
           - llvm: '17'
           - llvm: '18'
           - llvm: '19'
+          - llvm: '20'
     runs-on: ${{ matrix.os || 'ubuntu-latest' }}
     timeout-minutes: 60
     steps:

README.md

@@ -452,11 +452,11 @@ LLVM_PROFDATA=<llvm-profdata-path> \
 
 Known compatible Rust (installed via rustup) and LLVM versions:
 
-|            | Rust 1.60-1.77 | Rust 1.78-1.81 | Rust 1.82-1.86 |
+|            | Rust 1.60-1.77 | Rust 1.78-1.81 | Rust 1.82-1.87 |
 | ---------- | -------------- | -------------- | -------------- |
 | LLVM 14-17 | **✓**          |                |                |
 | LLVM 18    |                | **✓**          |                |
-| LLVM 19    |                |                | **✓**          |
+| LLVM 19-20 |                |                | **✓**          |
 
 ### Get coverage of external tests