all: use compiler-rt for builtins

2026-08-15 00:13:43 +00:00 · 2018-10-07 17:37:27 +02:00
parent e8f211935e
commit 22da104530
11 changed files with 350 additions and 13 deletions
@@ -0,0 +1,186 @@
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+// These are the GENERIC_SOURCES according to CMakeList.txt.
+var genericBuiltins = []string{
+	"absvdi2",
+	"absvsi2",
+	"absvti2",
+	"adddf3",
+	"addsf3",
+	"addtf3",
+	"addvdi3",
+	"addvsi3",
+	"addvti3",
+	"apple_versioning",
+	"ashldi3",
+	"ashlti3",
+	"ashrdi3",
+	"ashrti3",
+	"bswapdi2",
+	"bswapsi2",
+	"clzdi2",
+	"clzsi2",
+	"clzti2",
+	"cmpdi2",
+	"cmpti2",
+	"comparedf2",
+	"comparesf2",
+	"ctzdi2",
+	"ctzsi2",
+	"ctzti2",
+	"divdc3",
+	"divdf3",
+	"divdi3",
+	"divmoddi4",
+	"divmodsi4",
+	"divsc3",
+	"divsf3",
+	"divsi3",
+	"divtc3",
+	"divti3",
+	"divtf3",
+	"extendsfdf2",
+	"extendhfsf2",
+	"ffsdi2",
+	"ffssi2",
+	"ffsti2",
+	"fixdfdi",
+	"fixdfsi",
+	"fixdfti",
+	"fixsfdi",
+	"fixsfsi",
+	"fixsfti",
+	"fixunsdfdi",
+	"fixunsdfsi",
+	"fixunsdfti",
+	"fixunssfdi",
+	"fixunssfsi",
+	"fixunssfti",
+	"floatdidf",
+	"floatdisf",
+	"floatsidf",
+	"floatsisf",
+	"floattidf",
+	"floattisf",
+	"floatundidf",
+	"floatundisf",
+	"floatunsidf",
+	"floatunsisf",
+	"floatuntidf",
+	"floatuntisf",
+	//"int_util",
+	"lshrdi3",
+	"lshrti3",
+	"moddi3",
+	"modsi3",
+	"modti3",
+	"muldc3",
+	"muldf3",
+	"muldi3",
+	"mulodi4",
+	"mulosi4",
+	"muloti4",
+	"mulsc3",
+	"mulsf3",
+	"multi3",
+	"multf3",
+	"mulvdi3",
+	"mulvsi3",
+	"mulvti3",
+	"negdf2",
+	"negdi2",
+	"negsf2",
+	"negti2",
+	"negvdi2",
+	"negvsi2",
+	"negvti2",
+	"os_version_check",
+	"paritydi2",
+	"paritysi2",
+	"parityti2",
+	"popcountdi2",
+	"popcountsi2",
+	"popcountti2",
+	"powidf2",
+	"powisf2",
+	"powitf2",
+	"subdf3",
+	"subsf3",
+	"subvdi3",
+	"subvsi3",
+	"subvti3",
+	"subtf3",
+	"trampoline_setup",
+	"truncdfhf2",
+	"truncdfsf2",
+	"truncsfhf2",
+	"ucmpdi2",
+	"ucmpti2",
+	"udivdi3",
+	"udivmoddi4",
+	"udivmodsi4",
+	"udivmodti4",
+	"udivsi3",
+	"udivti3",
+	"umoddi3",
+	"umodsi3",
+	"umodti3",
+}
+
+// Get the builtins archive, possibly generating it as needed.
+func loadBuiltins(target string) (path string, err error) {
+	outfile := "librt-" + target + ".a"
+	builtinsDir := filepath.Join(sourceDir(), "lib", "compiler-rt", "lib", "builtins")
+
+	srcs := make([]string, len(genericBuiltins))
+	for i, name := range genericBuiltins {
+		srcs[i] = filepath.Join(builtinsDir, name+".c")
+	}
+
+	if path, err := cacheLoad(outfile, commands["clang"], srcs); path != "" || err != nil {
+		return path, err
+	}
+
+	dir, err := ioutil.TempDir("", "tinygo-builtins")
+	if err != nil {
+		return "", err
+	}
+	defer os.RemoveAll(dir)
+
+	// Compile all builtins.
+	// TODO: use builtins optimized for a given target if available.
+	objs := make([]string, 0, len(genericBuiltins))
+	for _, name := range genericBuiltins {
+		objpath := filepath.Join(dir, name+".o")
+		objs = append(objs, objpath)
+		srcpath := filepath.Join(builtinsDir, name+".c")
+		cmd := exec.Command(commands["clang"], "-c", "-Oz", "-g", "-Werror", "-Wall", "-std=c11", "--target="+target, "-o", objpath, srcpath)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		cmd.Dir = dir
+		err = cmd.Run()
+		if err != nil {
+			return "", err
+		}
+	}
+
+	// Put all builtins in an archive to link as a static library.
+	arpath := filepath.Join(dir, "librt.a")
+	cmd := exec.Command(commands["ar"], append([]string{"cr", arpath}, objs...)...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = dir
+	err = cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	return cacheStore(arpath, outfile, commands["clang"], srcs)
+}