Add support for LLVM 17 (but don't use it as default yet)

.github/workflows/test.yml

@@ -90,3 +90,17 @@ jobs:
       - name: Test default LLVM
         run:
           go test -v
+  test-linux-llvm-17:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install LLVM
+        run: |
+          echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-17 main' | sudo tee /etc/apt/sources.list.d/llvm.list
+          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends llvm-17-dev
+      - name: Test LLVM 17
+        run:
+          go test -v -tags=llvm17

backports.h

@@ -1,7 +1,6 @@
 
 #include "llvm-c/DebugInfo.h"
 #include "llvm-c/Types.h"
-#include "llvm-c/Transforms/PassManagerBuilder.h"
 
 #ifdef __cplusplus
 extern "C" {

ir.go

@@ -980,10 +980,6 @@ func ConstIntCast(v Value, t Type, signed bool) (rv Value) {
 	return
 }
 func ConstFPCast(v Value, t Type) (rv Value) { rv.C = C.LLVMConstFPCast(v.C, t.C); return }
-func ConstSelect(cond, iftrue, iffalse Value) (rv Value) {
-	rv.C = C.LLVMConstSelect(cond.C, iftrue.C, iffalse.C)
-	return
-}
 func ConstExtractElement(vec, i Value) (rv Value) {
 	rv.C = C.LLVMConstExtractElement(vec.C, i.C)
 	return

llvm_config_linux_llvm16.go

@@ -1,4 +1,4 @@
-//go:build !byollvm && linux && !llvm14 && !llvm15
+//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm17
 
 package llvm
 

llvm_config_linux_llvm17.go

@@ -0,0 +1,10 @@
+//go:build !byollvm && linux && llvm17
+
+package llvm
+
+// #cgo CPPFLAGS: -I/usr/include/llvm-17 -I/usr/include/llvm-c-17 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo CXXFLAGS: -std=c++17
+// #cgo LDFLAGS: -L/usr/lib/llvm-17/lib  -lLLVM-17
+import "C"
+
+type run_build_sh int