[committed] RISC-V testsuite adjustments for c23

Mix of fixes and workarounds by passing in -std=gnu17.  The former is the
preferred approach, but occasionally we have code that's just fugly to fix.

gcc/testsuite/
	* gcc.target/riscv/cmo-32.c: Pass in -std=gnu17.
	* gcc.target/riscv/cmo-64.c: Likewise.
	* gcc.target/riscv/pr98777.c: Likewise.
	* gcc.target/riscv/rvv/vsetvl/pr115214.c: Likewise.
	* gcc.target/riscv/rvv/autovec/pr113469.c: Likewise.
	* gcc.target/riscv/rvv/autovec/pr111391-1.c: Fix prototype for c23.
	* gcc.target/riscv/rvv/vsetvl/vsetvl_bug-1.c: Likewise.
	* gcc.target/riscv/sum-of-two-s12-const-2.c: Likewise.
	* gcc.target/riscv/target-attr-01.c: Likewise.
	* gcc.target/riscv/target-attr-02.c: Likewise.
	* gcc.target/riscv/target-attr-03.c: Likewise.
	* gcc.target/riscv/target-attr-04.c: Likewise.
	* gcc.target/riscv/target-attr-05.c: Likewise.
	* gcc.target/riscv/target-attr-06.c: Likewise.
	* gcc.target/riscv/target-attr-07.c: Likewise.
	* gcc.target/riscv/target-attr-08.c: Likewise.
	* gcc.target/riscv/target-attr-09.c: Likewise.
	* gcc.target/riscv/target-attr-10.c: Likewise.
	* gcc.target/riscv/target-attr-11.c: Likewise.
	* gcc.target/riscv/target-attr-12.c: Likewise.
	* gcc.target/riscv/target-attr-13.c: Likewise.
	* gcc.target/riscv/target-attr-14.c: Likewise.
	* gcc.target/riscv/target-attr-15.c: Likewise.
	* gcc.target/riscv/target-attr-bad-01.c: Likewise.
	* gcc.target/riscv/target-attr-bad-02.c: Likewise.
	* gcc.target/riscv/target-attr-bad-03.c: Likewise.
	* gcc.target/riscv/target-attr-bad-04.c: Likewise.
	* gcc.target/riscv/target-attr-bad-05.c: Likewise.
	* gcc.target/riscv/target-attr-bad-06.c: Likewise.
	* gcc.target/riscv/target-attr-bad-07.c: Likewise.
	* gcc.target/riscv/target-attr-bad-08.c: Likewise.
	* gcc.target/riscv/target-attr-bad-09.c: Likewise.
	* gcc.target/riscv/target-attr-bad-10.c: Likewise.

gcc/testsuite/gcc.target/riscv/cmo-32.c

@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target rv32} */
-/* { dg-options "-march=rv32gc_zicbom_zicbop_zicboz -mabi=ilp32" } */
+/* { dg-options "-march=rv32gc_zicbom_zicbop_zicboz -mabi=ilp32 -std=gnu17" } */
 
 #include "riscv_cmo.h"
 

gcc/testsuite/gcc.target/riscv/cmo-64.c

@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target rv64 } */
-/* { dg-options "-march=rv64gc_zicbom_zicbop_zicboz -mabi=lp64d" } */
+/* { dg-options "-march=rv64gc_zicbom_zicbop_zicboz -mabi=lp64d -std=gnu17" } */
 
 #include "riscv_cmo.h"
 

gcc/testsuite/gcc.target/riscv/pr98777.c

@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fstrict-aliasing" } */
+/* { dg-options "-fstrict-aliasing -std=gnu17" } */
 /* { dg-skip-if "" { *-*-* } { "-O0" } } */
 
 typedef struct {

gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111391-1.c

@@ -1,11 +1,11 @@
 /* { dg-do compile } */
 /* { dg-options "-march=rv64gcv -mabi=lp64d -Wno-int-conversion -Wno-implicit-function -Wno-incompatible-pointer-types -Wno-implicit-function-declaration -Ofast -ftree-vectorize" } */
 
-int d ();
 typedef struct
 {
   int b;
 } c;
+int d (c *);
 int
 e (char *f, long g)
 {

gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c

@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-march=rv32gcv -mabi=ilp32d -O3 -fno-vect-cost-model" } */
+/* { dg-options "-march=rv32gcv -mabi=ilp32d -O3 -fno-vect-cost-model -std=gnu17" } */
 
 struct a {
  int b;

gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr115214.c

@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-mrvv-vector-bits=scalable -march=rv64gcv -mabi=lp64d -O3 -w" } */
+/* { dg-options "-mrvv-vector-bits=scalable -march=rv64gcv -mabi=lp64d -O3 -w -std=gnu17" } */
 /* { dg-skip-if "" { *-*-* } { "-flto" } } */
 
 #include <riscv_vector.h>

gcc/testsuite/gcc.target/riscv/rvv/vsetvl/vsetvl_bug-1.c

@@ -13,9 +13,7 @@ int yabba = 1;
 
 
 int
-f (a, b)
-     unsigned char a;
-     unsigned long b;
+f (unsigned char a, unsigned long b)
 {
   long i, j, p, q, r, s;
 

gcc/testsuite/gcc.target/riscv/sum-of-two-s12-const-2.c

@@ -6,7 +6,7 @@
 /* { dg-options { -march=rv64gcv -mabi=lp64d -O2 } } */
 /* { dg-skip-if "" { *-*-* } { "-O0" "O1" "-Og" "-Os" "-Oz" } } */
 
-int a() {
+int a(char x[]) {
   char b[4096];
   if (a(b))
     a(b);

gcc/testsuite/gcc.target/riscv/target-attr-01.c

@@ -10,7 +10,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_zba1p0" } } */
-long foo () __attribute__((target("arch=rv64gc_zba")));
+long foo (long a, long b) __attribute__((target("arch=rv64gc_zba")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-02.c

@@ -10,7 +10,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_zba1p0" } } */
-long foo () __attribute__((target("arch=+zba")));
+long foo (long a, long b) __attribute__((target("arch=+zba")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-03.c

@@ -11,7 +11,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0" } } */
-long foo () __attribute__((target("arch=rv64gc")));
+long foo (long a, long b) __attribute__((target("arch=rv64gc")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-04.c

@@ -13,7 +13,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zmmul1p0_zaamo1p0_zalrsc1p0" } } */
-long foo () __attribute__((target("cpu=sifive-u74")));
+long foo (long a, long b) __attribute__((target("cpu=sifive-u74")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-05.c

@@ -11,7 +11,7 @@
 **   sh1add\s*a0,a1,a0
 **   ...
 */
-long foo () __attribute__((target("cpu=sifive-u74;arch=rv64gc_zba")));
+long foo (long a, long b) __attribute__((target("cpu=sifive-u74;arch=rv64gc_zba")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-06.c

@@ -11,7 +11,7 @@
 **   sh1add\s*a0,a1,a0
 **   ...
 */
-long foo ()
+long foo (long a, long b)
 __attribute__((target("cpu=sifive-u74;tune=sifive-5-series;arch=rv64gc_zba")));
 long foo (long a, long b)
 {

gcc/testsuite/gcc.target/riscv/target-attr-07.c

@@ -9,7 +9,7 @@
 **   # tune = sifive-5-series
 **   ...
 */
-long foo () __attribute__((target("tune=sifive-5-series")));
+long foo (long a, long b) __attribute__((target("tune=sifive-5-series")));
 long foo (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-08.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("arch=rv64gc_zbb")))
 __attribute__((target("arch=rv64gc_zba")));
 

gcc/testsuite/gcc.target/riscv/target-attr-09.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("cpu=sifive-e20")))
 __attribute__((target("cpu=sifive-u74")));
 

gcc/testsuite/gcc.target/riscv/target-attr-10.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("tune=rocket")))
 __attribute__((target("tune=sifive-u74")));
 

gcc/testsuite/gcc.target/riscv/target-attr-11.c

@@ -3,10 +3,10 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("arch=rv64gc_zbb")));
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("arch=rv64gc_zba")));
 
 /*

gcc/testsuite/gcc.target/riscv/target-attr-12.c

@@ -3,10 +3,10 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("cpu=sifive-e20")));
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("cpu=sifive-u74")));
 
 /*

gcc/testsuite/gcc.target/riscv/target-attr-13.c

@@ -3,10 +3,10 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 /* { dg-final { check-function-bodies "**" "" } } */
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("tune=rocket")));
 
-long foo ()
+long foo (long a, long b)
 __attribute__((target("tune=sifive-u74")));
 
 /*

gcc/testsuite/gcc.target/riscv/target-attr-14.c

@@ -10,7 +10,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_zba1p0" } } */
-long foo () __attribute__((target("arch=rv64gc_zba")));
+long foo (long a, long b) __attribute__((target("arch=rv64gc_zba")));
 long foo (long a, long b)
 {
   return a + (b * 2);
@@ -35,7 +35,7 @@ long bar (long a, long b)
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_xtheadba1p0" } } */
-long foo_th () __attribute__((target("arch=rv64gc_xtheadba")));
+long foo_th (long, long) __attribute__((target("arch=rv64gc_xtheadba")));
 long foo_th (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-15.c

@@ -10,7 +10,7 @@
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_zba1p0" } } */
-long foo () __attribute__((target("arch=rv64gc_zba")));
+long foo (long a, long b) __attribute__((target("arch=rv64gc_zba")));
 long foo (long a, long b)
 {
   return a + (b * 2);
@@ -35,7 +35,7 @@ long bar (long a, long b)
 **   ...
 */
 /* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zaamo1p0_zalrsc1p0_zca1p0_zcd1p0_xtheadba1p0" } } */
-long foo_th () __attribute__((target("arch=+xtheadba")));
+long foo_th (long, long) __attribute__((target("arch=+xtheadba")));
 long foo_th (long a, long b)
 {
   return a + (b * 2);

gcc/testsuite/gcc.target/riscv/target-attr-bad-01.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target("arch=rv64gc_zba;;"))); /* { dg-error "malformed" } */
+long foo(long a, long b) __attribute__((target("arch=rv64gc_zba;;"))); /* { dg-error "malformed" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-02.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target("cpu=xyz-cpu"))); /* { dg-error "unknown CPU" } */
+long foo(long a, long b) __attribute__((target("cpu=xyz-cpu"))); /* { dg-error "unknown CPU" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-03.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target("tune=xyz-cpu"))); /* { dg-error "unknown TUNE" } */
+long foo(long a, long b) __attribute__((target("tune=xyz-cpu"))); /* { dg-error "unknown TUNE" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-04.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target(123))); /* { dg-error "argument not a string" } */
+long foo(long a, long b) __attribute__((target(123))); /* { dg-error "argument not a string" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-05.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target(""))); /* { dg-warning "empty string in attribute .target." } */
+long foo(long a, long b) __attribute__((target(""))); /* { dg-warning "empty string in attribute .target." } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-06.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target("arch=*x"))); /* { dg-error "must start with \\+ or rv" } */
+long foo(long a, long b) __attribute__((target("arch=*x"))); /* { dg-error "must start with \\+ or rv" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-07.c

@@ -3,7 +3,7 @@
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
 
-long foo() __attribute__((target("arch=+zbb_zba"))); /* { dg-error "extension 'zbb_zba' starts with 'z' but is unsupported standard extension" } */
+long foo(long a, long b) __attribute__((target("arch=+zbb_zba"))); /* { dg-error "extension 'zbb_zba' starts with 'z' but is unsupported standard extension" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-08.c

@@ -2,7 +2,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
-long foo() __attribute__((target("arch=rv64gc_zba;arch=rv64gc_zba"))); /* { dg-error "arch appears more than once" } */
+long foo(long a, long b) __attribute__((target("arch=rv64gc_zba;arch=rv64gc_zba"))); /* { dg-error "arch appears more than once" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-09.c

@@ -2,7 +2,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
-long foo() __attribute__((target("cpu=sifive-u74;cpu=sifive-u74"))); /* { dg-error "cpu appears more than once" } */
+long foo(long a, long b) __attribute__((target("cpu=sifive-u74;cpu=sifive-u74"))); /* { dg-error "cpu appears more than once" } */
 long foo(long a, long b){
   return a + (b * 2);
 }

gcc/testsuite/gcc.target/riscv/target-attr-bad-10.c

@@ -2,7 +2,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
 /* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
 
-long foo() __attribute__((target("tune=sifive-u74;tune=sifive-u74"))); /* { dg-error "tune appears more than once" } */
+long foo(long a, long b) __attribute__((target("tune=sifive-u74;tune=sifive-u74"))); /* { dg-error "tune appears more than once" } */
 long foo(long a, long b){
   return a + (b * 2);
 }