Subzero: Emit functions and global initializers in a separate thread.

src/IceTargetLoweringX8632.cpp

Index: src/IceTargetLoweringX8632.cpp
diff --git a/src/IceTargetLoweringX8632.cpp b/src/IceTargetLoweringX8632.cpp
index 9fd0106a39cbbbb1530d85bd0d5153ab0d764ee7..f4498b6ace1242607d051e3b84cfdcac47f6ce03 100644
--- a/src/IceTargetLoweringX8632.cpp
+++ b/src/IceTargetLoweringX8632.cpp
@@ -4701,7 +4701,7 @@ void TargetDataX8632::emitConstantPool(GlobalContext *Ctx) {
   }
 }
 
-void TargetDataX8632::lowerConstants(GlobalContext *Ctx) const {
+void TargetDataX8632::lowerConstants() const {
   if (Ctx->getFlags().getDisableTranslation())
     return;
   // No need to emit constants from the int pool since (for x86) they