x86: Disallow MMX and 80387 in no_caller_saved_registers function

commit 9804b23198b39f85a7258be556c5e8aed44b9efc
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Apr 13 11:38:24 2025 -0700

    x86: Add preserve_none and update no_caller_saved_registers attributes

allowed MMX/80387 instructions in functions with no_caller_saved_registers
attribute by accident.  Update ix86_set_current_function to properly
check if MMX and 80387 are enabled.

gcc/

	PR target/121540
	* config/i386/i386-options.cc (ix86_set_current_function):
	Properly check if MMX and 80387 are enabled.

gcc/testsuite/

	PR target/121540
	* gcc.target/i386/no-callee-saved-19a.c (dg-options): Add
	"-mno-avx -mno-mmx -mno-80387"
	* gcc.target/i386/no-callee-saved-19b.c: Likewise.
	* gcc.target/i386/no-callee-saved-19c.c: Likewise.
	* gcc.target/i386/no-callee-saved-19d.c: Likewise.
	* gcc.target/i386/no-callee-saved-19e.c: Likewise.
	* gcc.target/i386/pr121208-1a.c: Likewise.
	* gcc.target/i386/pr121208-1b.c: Likewise.
	* gcc.target/i386/pr121540-1.c: New test.
	* gcc.target/i386/pr121540-2.c: Likewise.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

10 files changed, 27 insertions, 7 deletions

diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 09a35ef..136c0f2 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -3556,6 +3556,10 @@ ix86_set_current_function (tree fndecl)
 	    isa = "AVX";
 	  else if (cfun->machine->func_type != TYPE_NORMAL)
 	    isa = "SSE";
+	  else if (TARGET_MMX)
+	    isa = "MMX/3Dnow";
+	  else if (TARGET_80387)
+	    isa = "80387";
 	  else
 	    isa = NULL;
 	}
diff --git a/gcc/testsuite/gcc.target/i386/no-callee-saved-19a.c b/gcc/testsuite/gcc.target/i386/no-callee-saved-19a.c
index 12f35cf..3ba578d 100644
--- a/gcc/testsuite/gcc.target/i386/no-callee-saved-19a.c
+++ b/gcc/testsuite/gcc.target/i386/no-callee-saved-19a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && lp64 } } } */
-/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mno-apxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
+/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mno-avx -mno-mmx -mno-80387 -mno-apxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
 /* Keep labels and directives ('.cfi_startproc', '.cfi_endproc').  */
 /* { dg-final { check-function-bodies "**" "" "" { target "*-*-*" } {^\t?\.}  } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/no-callee-saved-19b.c b/gcc/testsuite/gcc.target/i386/no-callee-saved-19b.c
index c9343a6..dc38936 100644
--- a/gcc/testsuite/gcc.target/i386/no-callee-saved-19b.c
+++ b/gcc/testsuite/gcc.target/i386/no-callee-saved-19b.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && maybe_x32 } } } */
-/* { dg-options "-O2 -mx32 -fno-pic -mtune=generic -msse2 -mno-apxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
+/* { dg-options "-O2 -mx32 -fno-pic -mtune=generic -msse2 -mno-avx -mno-mmx -mno-80387 -mno-apxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
 /* Keep labels and directives ('.cfi_startproc', '.cfi_endproc').  */
 /* { dg-final { check-function-bodies "**" "" "" { target "*-*-*" } {^\t?\.}  } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/no-callee-saved-19c.c b/gcc/testsuite/gcc.target/i386/no-callee-saved-19c.c
index 05aca9f..e7f247b 100644
--- a/gcc/testsuite/gcc.target/i386/no-callee-saved-19c.c
+++ b/gcc/testsuite/gcc.target/i386/no-callee-saved-19c.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && ia32 } } } */
-/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
+/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mno-avx -mno-mmx -mno-80387 -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
 /* Keep labels and directives ('.cfi_startproc', '.cfi_endproc').  */
 /* { dg-final { check-function-bodies "**" "" "" { target "*-*-*" } {^\t?\.}  } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/no-callee-saved-19d.c b/gcc/testsuite/gcc.target/i386/no-callee-saved-19d.c
index b3caa3d..4657e17 100644
--- a/gcc/testsuite/gcc.target/i386/no-callee-saved-19d.c
+++ b/gcc/testsuite/gcc.target/i386/no-callee-saved-19d.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && lp64 } } } */
-/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mapxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
+/* { dg-options "-O2 -fno-pic -mtune=generic -msse2 -mno-avx -mno-mmx -mno-80387 -mapxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
 /* Keep labels and directives ('.cfi_startproc', '.cfi_endproc').  */
 /* { dg-final { check-function-bodies "**" "" "" { target "*-*-*" } {^\t?\.}  } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/no-callee-saved-19e.c b/gcc/testsuite/gcc.target/i386/no-callee-saved-19e.c
index 3fcb41f..8e0bbe8 100644
--- a/gcc/testsuite/gcc.target/i386/no-callee-saved-19e.c
+++ b/gcc/testsuite/gcc.target/i386/no-callee-saved-19e.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && maybe_x32 } } } */
-/* { dg-options "-O2 -mx32 -fno-pic -mtune=generic -msse2 -mapxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
+/* { dg-options "-O2 -mx32 -fno-pic -mtune=generic -msse2 -mno-avx -mno-mmx -mno-80387 -mapxf -mtune-ctrl=prologue_using_move,epilogue_using_move" } */
 /* Keep labels and directives ('.cfi_startproc', '.cfi_endproc').  */
 /* { dg-final { check-function-bodies "**" "" "" { target "*-*-*" } {^\t?\.}  } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/pr121208-1a.c b/gcc/testsuite/gcc.target/i386/pr121208-1a.c
index cb8bd0b..f799bc8 100644
--- a/gcc/testsuite/gcc.target/i386/pr121208-1a.c
+++ b/gcc/testsuite/gcc.target/i386/pr121208-1a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fPIC -mno-80387 -mtls-dialect=gnu" } */
+/* { dg-options "-O2 -fPIC -mno-avx -mno-mmx -mno-80387 -mtls-dialect=gnu" } */
 
 extern __thread int bar;
 extern void func (void);
diff --git a/gcc/testsuite/gcc.target/i386/pr121208-1b.c b/gcc/testsuite/gcc.target/i386/pr121208-1b.c
index 037e9a0..ba37abc 100644
--- a/gcc/testsuite/gcc.target/i386/pr121208-1b.c
+++ b/gcc/testsuite/gcc.target/i386/pr121208-1b.c
@@ -1,4 +1,4 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fPIC -mno-80387 -mtls-dialect=gnu2" } */
+/* { dg-options "-O2 -fPIC -mno-avx -mno-mmx -mno-80387 -mtls-dialect=gnu2" } */
 
 #include "pr121208-1a.c"
diff --git a/gcc/testsuite/gcc.target/i386/pr121540-1.c b/gcc/testsuite/gcc.target/i386/pr121540-1.c
new file mode 100644
index 0000000..dee9c27
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr121540-1.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -march=x86-64" } */
+
+void
+ __attribute__ ((no_caller_saved_registers))
+fn (void)
+{ /* { dg-message "sorry, unimplemented: MMX/3Dnow instructions aren't allowed" } */
+}
diff --git a/gcc/testsuite/gcc.target/i386/pr121540-2.c b/gcc/testsuite/gcc.target/i386/pr121540-2.c
new file mode 100644
index 0000000..15a3f40
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr121540-2.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -march=x86-64 -mno-mmx" } */
+
+void
+ __attribute__ ((no_caller_saved_registers))
+fn (void)
+{ /* { dg-message "sorry, unimplemented: 80387 instructions aren't allowed" } */
+}