--- old/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	2013-06-04 10:04:53.000000000 -0700
+++ new/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	2013-06-04 10:04:53.000000000 -0700
@@ -93,6 +93,10 @@
   register void *esp;
   __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp));
   return (address) ((char*)esp + sizeof(long)*2);
+#elif defined(__clang__)
+  intptr_t* esp;
+  __asm__ __volatile__ ("mov %%"SPELL_REG_SP", %0":"=r"(esp):);
+  return (address) esp;
 #else
   register void *esp __asm__ (SPELL_REG_SP);
   return (address) esp;
@@ -175,6 +179,9 @@
 #ifdef SPARC_WORKS
   register intptr_t **ebp;
   __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp));
+#elif defined(__clang__)
+  intptr_t **ebp;
+  __asm__ __volatile__ ("mov %%"SPELL_REG_FP", %0":"=r"(ebp):);
 #else
   register intptr_t **ebp __asm__ (SPELL_REG_FP);
 #endif