compiler(amd64): return false on SSE4 unsupported CPUs (#1121)

Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
Co-authored-by: Takeshi Yoneda <t.y.mathetake@gmail.com>

internal/platform/platform.go

@@ -10,6 +10,9 @@ import (
 	"runtime"
 )
 
+// archRequirementsVerified is set by platform-specific init to true if the platform is supported
+var archRequirementsVerified bool
+
 // CompilerSupported is exported for tests and includes constraints here and also the assembler.
 func CompilerSupported() bool {
 	switch runtime.GOOS {
@@ -18,13 +21,7 @@ func CompilerSupported() bool {
 		return false
 	}
 
-	switch runtime.GOARCH {
+	return archRequirementsVerified
-	case "amd64", "arm64":
-	default:
-		return false
-	}
-
-	return true
 }
 
 // MmapCodeSegment copies the code into the executable region and returns the byte slice of the region.

internal/platform/platform_amd64.go

@@ -0,0 +1,7 @@
+package platform
+
+// init verifies that the current CPU supports the required AMD64 instructions
+func init() {
+	// Ensure SSE4.1 is supported.
+	archRequirementsVerified = CpuFeatures.Has(CpuFeatureSSE4_1)
+}

internal/platform/platform_arm64.go

@@ -0,0 +1,7 @@
+package platform
+
+// init verifies that the current CPU supports the required ARM64 features
+func init() {
+	// No further checks currently needed.
+	archRequirementsVerified = true
+}