Differential Revision: https://reviews.llvm.org/D108682
#include <uintrintrin.h>
#endif
+#define __SSC_MARK(Tag) \
+ __asm__ __volatile__("movl %%ebx, %%eax; movl %0, %%ebx; .byte 0x64, 0x67, " \
+ "0x90; movl %%eax, %%ebx;" ::"i"(Tag) \
+ : "%eax");
+
#endif /* __X86GPRINTRIN_H */
--- /dev/null
+// REQUIRES: x86-registered-target
+// RUN: %clang_cc1 %s -triple=x86_64-unknown-unknown -S -ffreestanding -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple=i386-unknown-unknown -S -ffreestanding -o - | FileCheck %s
+
+#include <immintrin.h>
+
+// The ebx may be use for base pointer, we need to restore it in time.
+void ssc_mark() {
+// CHECK-LABEL: ssc_mark
+// CHECK: #APP
+// CHECK: movl %ebx, %eax
+// CHECK: movl $0, %ebx
+// CHECK: .byte 100
+// CHECK: .byte 103
+// CHECK: .byte 144
+// CHECK: movl %eax, %ebx
+// CHECK: #NO_APP
+
+ __SSC_MARK(0x0);
+}