cl: PkgLinkIR/PkgLinkExtern support init if not using cgo

Author: visualfc

cl/_testlibc/demangle/out.ll

@@ -17,6 +17,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/cpp/llvm.init"()
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
@@ -58,6 +59,8 @@ _llgo_3:                                          ; preds = %_llgo_0
   br label %_llgo_2
 }
 
+declare void @"github.com/goplus/llgo/cpp/llvm.init"()
+
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 declare ptr @_ZN4llvm15itaniumDemangleENSt3__117basic_string_viewIcNS0_11char_traitsIcEEEEb(%"github.com/goplus/llgo/internal/runtime.String", i1)

cl/_testlibc/sqlite/out.ll

@@ -29,6 +29,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/c/sqlite.init"()
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
@@ -55,6 +56,8 @@ declare i32 @printf(ptr, ...)
 
 declare void @exit(i32)
 
+declare void @"github.com/goplus/llgo/c/sqlite.init"()
+
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 declare { ptr, i32 } @"github.com/goplus/llgo/c/sqlite.OpenV2"(ptr, i32, ptr)

cl/_testpy/callpy/out.ll

@@ -23,6 +23,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   call void @"github.com/goplus/llgo/py/math.init"()
   call void @"github.com/goplus/llgo/py/os.init"()
   call void @"github.com/goplus/llgo/py/std.init"()
@@ -58,6 +59,8 @@ _llgo_0:
   ret i32 0
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare void @"github.com/goplus/llgo/py/math.init"()
 
 declare void @"github.com/goplus/llgo/py/os.init"()

cl/_testpy/gcd/out.ll

@@ -16,6 +16,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   call void @"github.com/goplus/llgo/py/math.init"()
   %1 = load ptr, ptr @__llgo_py.math, align 8
   call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @1, ptr @__llgo_py.math.gcd, ptr null)
@@ -42,6 +43,8 @@ _llgo_0:
   ret i32 0
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare void @"github.com/goplus/llgo/py/math.init"()
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testpy/math/out.ll

@@ -12,6 +12,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"math.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   %1 = load ptr, ptr @__llgo_py.math, align 8
   %2 = icmp ne ptr %1, null
   br i1 %2, label %_llgo_2, label %_llgo_3
@@ -25,4 +26,6 @@ _llgo_3:                                          ; preds = %_llgo_1
   br label %_llgo_2
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare ptr @PyImport_ImportModule(ptr)

cl/_testpy/matrix/out.ll

@@ -18,6 +18,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   call void @"github.com/goplus/llgo/py/numpy.init"()
   %1 = load ptr, ptr @__llgo_py.numpy, align 8
   call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @3, ptr @__llgo_py.numpy.add, ptr null)
@@ -98,6 +99,8 @@ _llgo_0:
   ret i32 0
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare void @"github.com/goplus/llgo/py/numpy.init"()
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testpy/max/out.ll

@@ -19,6 +19,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   call void @"github.com/goplus/llgo/py/std.init"()
   %1 = load ptr, ptr @__llgo_py.builtins, align 8
   call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @0, ptr @__llgo_py.builtins.iter, ptr @1, ptr @__llgo_py.builtins.max, ptr @2, ptr @__llgo_py.builtins.print, ptr null)
@@ -74,6 +75,8 @@ _llgo_0:
   ret i32 0
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare void @"github.com/goplus/llgo/py/std.init"()
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testpy/pow/out.ll

@@ -16,6 +16,7 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/py.init"()
   call void @"github.com/goplus/llgo/py/math.init"()
   %1 = load ptr, ptr @__llgo_py.math, align 8
   call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @1, ptr @__llgo_py.math.pow, ptr null)
@@ -41,6 +42,8 @@ _llgo_0:
   ret i32 0
 }
 
+declare void @"github.com/goplus/llgo/py.init"()
+
 declare void @"github.com/goplus/llgo/py/math.init"()
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/instr.go

@@ -300,10 +300,31 @@ func (p *context) funcKind(vfn ssa.Value) int {
 	return fnNormal
 }
 
+func usingCgo(pkg *types.Package) bool {
+	var n int
+	for _, im := range pkg.Imports() {
+		switch im.Path() {
+		case "syscall", "runtime/cgo":
+			n++
+			if n == 2 {
+				return true
+			}
+		}
+	}
+	return false
+}
+
 func (p *context) pkgNoInit(pkg *types.Package) bool {
 	p.ensureLoaded(pkg)
 	if i, ok := p.loaded[pkg]; ok {
-		return i.kind >= PkgNoInit
+		switch i.kind {
+		case PkgNoInit, PkgDeclOnly:
+			return true
+		case PkgLinkIR, PkgLinkExtern:
+			if usingCgo(pkg) {
+				return true
+			}
+		}
 	}
 	return false
 }