rtl_data: Add sp_is_clobbered_by_asm

Add sp_is_clobbered_by_asm to rtl_data to inform backends that the stack
pointer is clobbered by asm statement.

gcc/

	PR target/97032
	* cfgexpand.c (asm_clobber_reg_kind): Set sp_is_clobbered_by_asm
	to true if the stack pointer is clobbered by asm statement.
	* emit-rtl.h (rtl_data): Add sp_is_clobbered_by_asm.
	* config/i386/i386.c (ix86_get_drap_rtx): Set need_drap to true
	if the stack pointer is clobbered by asm statement.

gcc/testsuite/

	PR target/97032
	* gcc.target/i386/pr97032.c: New test.

(cherry picked from commit 453a20c65722719b9e2d84339f215e7ec87692dc)

1 files changed, 23 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr97032.c b/gcc/testsuite/gcc.target/i386/pr97032.c
new file mode 100644
index 00000000000..7cbbe9bc22a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr97032.c
@@ -0,0 +1,23 @@
+/* { dg-do compile { target { ia32 && fstack_protector } } } */
+/* { dg-options "-O2 -mincoming-stack-boundary=2 -fstack-protector-all" } */
+
+#include <stdarg.h>
+
+extern int *__errno_location (void);
+
+long
+sys_socketcall (int op, ...)
+{
+  long int res;
+  va_list ap;
+  va_start (ap, op);
+  asm volatile ("push %%ebx; movl %2, %%ebx; int $0x80; pop %%ebx"
+  /* { dg-warning "listing the stack pointer register" "" { target *-*-* } .-1 } */
+		: "=a" (res) : "0" (102), "ri" (16), "c" (ap) : "memory", "esp");
+  if (__builtin_expect (res > 4294963200UL, 0))
+    *__errno_location () = -res;
+  va_end (ap);
+  return res;
+}
+
+/* { dg-final { scan-assembler "call\[ \t\]*_?__errno_location" } } */