diff mbox series

[v2] RISC-V: Error early with V and no M extension.

Message ID D2XVGZ8PI5O6.236N99CMLXQC0@gmail.com
State New
Headers show
Series [v2] RISC-V: Error early with V and no M extension. | expand

Commit Message

Robin Dapp July 24, 2024, 3:25 p.m. UTC
Hi,

now with proper diff...

For calculating the value of a poly_int at runtime we use a
multiplication instruction that requires the M extension.
Instead of just asserting and ICEing this patch emits an early
error at option-parsing time.

We have several tests that use only "i" (without "m") and I adjusted all of
them to "im".  For now, I didn't verify if the original error just with "i"
still occurs but just added "m".

Tested on rv64gcv_zvfh_zvbb.

Regards
 Robin

gcc/ChangeLog:

	PR target/116036

	* config/riscv/riscv.cc (riscv_override_options_internal): Error
	with TARGET_VECTOR && !TARGET_MUL.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/arch-31.c: Add m to arch string and expect it.
	* gcc.target/riscv/arch-32.c: Ditto.
	* gcc.target/riscv/arch-37.c: Ditto.
	* gcc.target/riscv/arch-38.c: Ditto.
	* gcc.target/riscv/predef-14.c: Ditto.
	* gcc.target/riscv/predef-15.c: Ditto.
	* gcc.target/riscv/predef-16.c: Ditto.
	* gcc.target/riscv/predef-26.c: Ditto.
	* gcc.target/riscv/predef-27.c: Ditto.
	* gcc.target/riscv/predef-32.c: Ditto.
	* gcc.target/riscv/predef-33.c: Ditto.
	* gcc.target/riscv/predef-36.c: Ditto.
	* gcc.target/riscv/predef-37.c: Ditto.
	* gcc.target/riscv/rvv/autovec/pr111486.c: Add m to arch string.
	* gcc.target/riscv/compare-debug-1.c: Ditto.
	* gcc.target/riscv/compare-debug-2.c: Ditto.
	* gcc.target/riscv/rvv/base/pr116036.c: New test.
---
 gcc/config/riscv/riscv.cc                             |  5 +++++
 gcc/testsuite/gcc.target/riscv/arch-31.c              |  2 +-
 gcc/testsuite/gcc.target/riscv/arch-32.c              |  2 +-
 gcc/testsuite/gcc.target/riscv/arch-37.c              |  2 +-
 gcc/testsuite/gcc.target/riscv/arch-38.c              |  2 +-
 gcc/testsuite/gcc.target/riscv/compare-debug-1.c      |  2 +-
 gcc/testsuite/gcc.target/riscv/compare-debug-2.c      |  2 +-
 gcc/testsuite/gcc.target/riscv/predef-14.c            |  6 +++---
 gcc/testsuite/gcc.target/riscv/predef-15.c            |  4 ++--
 gcc/testsuite/gcc.target/riscv/predef-16.c            |  4 ++--
 gcc/testsuite/gcc.target/riscv/predef-26.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/predef-27.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/predef-32.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/predef-33.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/predef-36.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/predef-37.c            |  6 +++++-
 gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c |  2 +-
 gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c    | 11 +++++++++++
 18 files changed, 60 insertions(+), 20 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c

Comments

Palmer Dabbelt July 24, 2024, 3:27 p.m. UTC | #1
On Wed, 24 Jul 2024 08:25:30 PDT (-0700), Robin Dapp wrote:
> Hi,
>
> now with proper diff...
>
> For calculating the value of a poly_int at runtime we use a
> multiplication instruction that requires the M extension.
> Instead of just asserting and ICEing this patch emits an early
> error at option-parsing time.
>
> We have several tests that use only "i" (without "m") and I adjusted all of
> them to "im".  For now, I didn't verify if the original error just with "i"
> still occurs but just added "m".
>
> Tested on rv64gcv_zvfh_zvbb.
>
> Regards
>  Robin
>
> gcc/ChangeLog:
>
> 	PR target/116036
>
> 	* config/riscv/riscv.cc (riscv_override_options_internal): Error
> 	with TARGET_VECTOR && !TARGET_MUL.
>
> gcc/testsuite/ChangeLog:
>
> 	* gcc.target/riscv/arch-31.c: Add m to arch string and expect it.
> 	* gcc.target/riscv/arch-32.c: Ditto.
> 	* gcc.target/riscv/arch-37.c: Ditto.
> 	* gcc.target/riscv/arch-38.c: Ditto.
> 	* gcc.target/riscv/predef-14.c: Ditto.
> 	* gcc.target/riscv/predef-15.c: Ditto.
> 	* gcc.target/riscv/predef-16.c: Ditto.
> 	* gcc.target/riscv/predef-26.c: Ditto.
> 	* gcc.target/riscv/predef-27.c: Ditto.
> 	* gcc.target/riscv/predef-32.c: Ditto.
> 	* gcc.target/riscv/predef-33.c: Ditto.
> 	* gcc.target/riscv/predef-36.c: Ditto.
> 	* gcc.target/riscv/predef-37.c: Ditto.
> 	* gcc.target/riscv/rvv/autovec/pr111486.c: Add m to arch string.
> 	* gcc.target/riscv/compare-debug-1.c: Ditto.
> 	* gcc.target/riscv/compare-debug-2.c: Ditto.
> 	* gcc.target/riscv/rvv/base/pr116036.c: New test.
> ---
>  gcc/config/riscv/riscv.cc                             |  5 +++++
>  gcc/testsuite/gcc.target/riscv/arch-31.c              |  2 +-
>  gcc/testsuite/gcc.target/riscv/arch-32.c              |  2 +-
>  gcc/testsuite/gcc.target/riscv/arch-37.c              |  2 +-
>  gcc/testsuite/gcc.target/riscv/arch-38.c              |  2 +-
>  gcc/testsuite/gcc.target/riscv/compare-debug-1.c      |  2 +-
>  gcc/testsuite/gcc.target/riscv/compare-debug-2.c      |  2 +-
>  gcc/testsuite/gcc.target/riscv/predef-14.c            |  6 +++---
>  gcc/testsuite/gcc.target/riscv/predef-15.c            |  4 ++--
>  gcc/testsuite/gcc.target/riscv/predef-16.c            |  4 ++--
>  gcc/testsuite/gcc.target/riscv/predef-26.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/predef-27.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/predef-32.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/predef-33.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/predef-36.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/predef-37.c            |  6 +++++-
>  gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c |  2 +-
>  gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c    | 11 +++++++++++
>  18 files changed, 60 insertions(+), 20 deletions(-)
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c
>
> diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
> index 7016a33cce3..fcdb7ab08dd 100644
> --- a/gcc/config/riscv/riscv.cc
> +++ b/gcc/config/riscv/riscv.cc
> @@ -9691,6 +9691,11 @@ riscv_override_options_internal (struct gcc_options *opts)
>    else if (!TARGET_MUL_OPTS_P (opts) && TARGET_DIV_OPTS_P (opts))
>      error ("%<-mdiv%> requires %<-march%> to subsume the %<M%> extension");
>  
> +  /* We might use a multiplication to calculate the scalable vector length at
> +     runtime.  Therefore, require the M extension.  */
> +  if (TARGET_VECTOR && !TARGET_MUL)
> +    sorry ("the %<V%> extension requires the %<M%> extension");

It's really GCC's implementation of the V extension that requires M, not 
the actul ISA V extension.  So I think the wording could be a little 
confusing for users here, but no big deal either way on my end so

Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>

Thanks!

> +
>    /* Likewise floating-point division and square root.  */
>    if ((TARGET_HARD_FLOAT_OPTS_P (opts) || TARGET_ZFINX_OPTS_P (opts))
>        && ((target_flags_explicit & MASK_FDIV) == 0))
> diff --git a/gcc/testsuite/gcc.target/riscv/arch-31.c b/gcc/testsuite/gcc.target/riscv/arch-31.c
> index 5180753b905..9b867c5ecd2 100644
> --- a/gcc/testsuite/gcc.target/riscv/arch-31.c
> +++ b/gcc/testsuite/gcc.target/riscv/arch-31.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv32i_zvfbfmin -mabi=ilp32f" } */
> +/* { dg-options "-march=rv32im_zvfbfmin -mabi=ilp32f" } */
>  int foo()
>  {
>  }
> diff --git a/gcc/testsuite/gcc.target/riscv/arch-32.c b/gcc/testsuite/gcc.target/riscv/arch-32.c
> index 49616832512..49a3db79489 100644
> --- a/gcc/testsuite/gcc.target/riscv/arch-32.c
> +++ b/gcc/testsuite/gcc.target/riscv/arch-32.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv64iv_zvfbfmin -mabi=lp64d" } */
> +/* { dg-options "-march=rv64imv_zvfbfmin -mabi=lp64d" } */
>  int foo()
>  {
>  }
> diff --git a/gcc/testsuite/gcc.target/riscv/arch-37.c b/gcc/testsuite/gcc.target/riscv/arch-37.c
> index 5b19a73c556..b56ba77b973 100644
> --- a/gcc/testsuite/gcc.target/riscv/arch-37.c
> +++ b/gcc/testsuite/gcc.target/riscv/arch-37.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv32i_zvfbfwma -mabi=ilp32f" } */
> +/* { dg-options "-march=rv32im_zvfbfwma -mabi=ilp32f" } */
>  int
>  foo ()
>  {}
> diff --git a/gcc/testsuite/gcc.target/riscv/arch-38.c b/gcc/testsuite/gcc.target/riscv/arch-38.c
> index cee3efebe75..164a91e38a3 100644
> --- a/gcc/testsuite/gcc.target/riscv/arch-38.c
> +++ b/gcc/testsuite/gcc.target/riscv/arch-38.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv64iv_zvfbfwma -mabi=lp64d" } */
> +/* { dg-options "-march=rv64imv_zvfbfwma -mabi=lp64d" } */
>  int
>  foo ()
>  {}
> diff --git a/gcc/testsuite/gcc.target/riscv/compare-debug-1.c b/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
> index d65bb287b9a..c22e967f03d 100644
> --- a/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
> +++ b/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64iv -mabi=lp64d -fcompare-debug" } */
> +/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64imv -mabi=lp64d -fcompare-debug" } */
>  
>  
>  void
> diff --git a/gcc/testsuite/gcc.target/riscv/compare-debug-2.c b/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
> index d87758475e4..be9bda17b59 100644
> --- a/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
> +++ b/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
> @@ -1,3 +1,3 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64iv -mabi=lp64d -fno-dce -fschedule-insns -fcompare-debug" } */
> +/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64imv -mabi=lp64d -fno-dce -fschedule-insns -fcompare-debug" } */
>  #include "compare-debug-1.c"
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-14.c b/gcc/testsuite/gcc.target/riscv/predef-14.c
> index 4815150ddfa..138209a0169 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-14.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-14.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv32iv -mabi=ilp32 -mcmodel=medlow -misa-spec=2.2" } */
> +/* { dg-options "-march=rv32imv -mabi=ilp32 -mcmodel=medlow -misa-spec=2.2" } */
>  
>  int main () {
>  
> @@ -27,8 +27,8 @@ int main () {
>  #error "__riscv_a"
>  #endif
>  
> -#if defined(__riscv_m)
> -#error "__riscv_m"
> +#if !defined(__riscv_mul)
> +#error "__riscv_mul"
>  #endif
>  
>  #if !defined(__riscv_f)
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-15.c b/gcc/testsuite/gcc.target/riscv/predef-15.c
> index dad14952ade..fd119dc7492 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-15.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-15.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv64iv_zvl512b -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
> +/* { dg-options "-march=rv64imv_zvl512b -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
>  
>  int main () {
>  
> @@ -27,7 +27,7 @@ int main () {
>  #error "__riscv_a"
>  #endif
>  
> -#if defined(__riscv_m)
> +#if !defined(__riscv_m)
>  #error "__riscv_m"
>  #endif
>  
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-16.c b/gcc/testsuite/gcc.target/riscv/predef-16.c
> index faebc1ab4f2..d64b8dc56eb 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-16.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-16.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv64i_zve64f -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
> +/* { dg-options "-march=rv64im_zve64f -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
>  
>  int main () {
>  
> @@ -27,7 +27,7 @@ int main () {
>  #error "__riscv_a"
>  #endif
>  
> -#if defined(__riscv_m)
> +#if !defined(__riscv_m)
>  #error "__riscv_m"
>  #endif
>  
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-26.c b/gcc/testsuite/gcc.target/riscv/predef-26.c
> index 285f64bd6c0..df0f05e4550 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-26.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-26.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv64i_zvfhmin -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv64im_zvfhmin -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int main () {
>  
> @@ -15,6 +15,10 @@ int main () {
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-27.c b/gcc/testsuite/gcc.target/riscv/predef-27.c
> index 0f9ab4417a6..554acf36e5c 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-27.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-27.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv64i_zvfh -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv64im_zvfh -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int main () {
>  
> @@ -15,6 +15,10 @@ int main () {
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-32.c b/gcc/testsuite/gcc.target/riscv/predef-32.c
> index 7417e0d996f..6d56f8fe6b8 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-32.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-32.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv32i_zvfbfmin -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv32im_zvfbfmin -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int main () {
>  
> @@ -15,6 +15,10 @@ int main () {
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-33.c b/gcc/testsuite/gcc.target/riscv/predef-33.c
> index 74d05bc9719..f1da7e582af 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-33.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-33.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv64iv_zvfbfmin -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv64imv_zvfbfmin -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int main () {
>  
> @@ -15,6 +15,10 @@ int main () {
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-36.c b/gcc/testsuite/gcc.target/riscv/predef-36.c
> index b0205b08513..7c87a42f3d3 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-36.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-36.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv32i_zvfbfwma -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv32im_zvfbfwma -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int
>  main ()
> @@ -16,6 +16,10 @@ main ()
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/predef-37.c b/gcc/testsuite/gcc.target/riscv/predef-37.c
> index b5aa41102f4..150150e3246 100644
> --- a/gcc/testsuite/gcc.target/riscv/predef-37.c
> +++ b/gcc/testsuite/gcc.target/riscv/predef-37.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-O2 -march=rv64iv_zvfbfwma -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
> +/* { dg-options "-O2 -march=rv64imv_zvfbfwma -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
>  
>  int
>  main ()
> @@ -16,6 +16,10 @@ main ()
>  #error "__riscv_i"
>  #endif
>  
> +#if !defined(__riscv_m)
> +#error "__riscv_m"
> +#endif
> +
>  #if !defined(__riscv_f)
>  #error "__riscv_f"
>  #endif
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
> index 2ba2a363399..483e9b931f6 100644
> --- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
> @@ -1,5 +1,5 @@
>  /* { dg-do compile } */
> -/* { dg-options "-march=rv64iv -mabi=lp64d -O2" } */
> +/* { dg-options "-march=rv64imv -mabi=lp64d -O2" } */
>  
>  typedef char __attribute__((__vector_size__ (1))) V;
>  
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c
> new file mode 100644
> index 00000000000..6819a786aec
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c
> @@ -0,0 +1,11 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64idv -mabi=lp64d -O3" } */
> +
> +int a[15][15];
> +void init() {
> +  for (int i_0 ; i_0 < 15 ; ++i_0)
> +    for (int i_1 = 0; i_1 < 15; ++i_1)
> +      a[i_0][i_1] = 1;
> +}
> +
> +/* { dg-excess-errors "sorry, unimplemented: the 'V' extension requires the 'M' extension" } */
> -- 
> 2.45.2
Robin Dapp July 24, 2024, 3:37 p.m. UTC | #2
> It's really GCC's implementation of the V extension that requires M, not 
> the actul ISA V extension.  So I think the wording could be a little 
> confusing for users here, but no big deal either way on my end so
>
> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>

Hmm, fair.  How about just "the 'V' implementation requires the 'M' extension"?
Or "the current 'V' implementation"?
Patrick O'Neill July 24, 2024, 3:40 p.m. UTC | #3
On 7/24/24 08:37, Robin Dapp wrote:
>> It's really GCC's implementation of the V extension that requires M, not
>> the actul ISA V extension.  So I think the wording could be a little
>> confusing for users here, but no big deal either way on my end so
>>
>> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
> Hmm, fair.  How about just "the 'V' implementation requires the 'M' extension"?
> Or "the current 'V' implementation"?
>
That phrasing makes sense to me. It's consistent with the -mbig-endian 
sorry message:

https://godbolt.org/z/oWMeorEeM

Patrick
Robin Dapp July 24, 2024, 3:50 p.m. UTC | #4
> That phrasing makes sense to me. It's consistent with the -mbig-endian 
> sorry message:
>
> https://godbolt.org/z/oWMeorEeM

I seem to remember that explicitly mentioning GCC in an error message like
that was discouraged but I might be confusing things.

So probably
"GCC's current 'V' implementation".
diff mbox series

Patch

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 7016a33cce3..fcdb7ab08dd 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -9691,6 +9691,11 @@  riscv_override_options_internal (struct gcc_options *opts)
   else if (!TARGET_MUL_OPTS_P (opts) && TARGET_DIV_OPTS_P (opts))
     error ("%<-mdiv%> requires %<-march%> to subsume the %<M%> extension");
 
+  /* We might use a multiplication to calculate the scalable vector length at
+     runtime.  Therefore, require the M extension.  */
+  if (TARGET_VECTOR && !TARGET_MUL)
+    sorry ("the %<V%> extension requires the %<M%> extension");
+
   /* Likewise floating-point division and square root.  */
   if ((TARGET_HARD_FLOAT_OPTS_P (opts) || TARGET_ZFINX_OPTS_P (opts))
       && ((target_flags_explicit & MASK_FDIV) == 0))
diff --git a/gcc/testsuite/gcc.target/riscv/arch-31.c b/gcc/testsuite/gcc.target/riscv/arch-31.c
index 5180753b905..9b867c5ecd2 100644
--- a/gcc/testsuite/gcc.target/riscv/arch-31.c
+++ b/gcc/testsuite/gcc.target/riscv/arch-31.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv32i_zvfbfmin -mabi=ilp32f" } */
+/* { dg-options "-march=rv32im_zvfbfmin -mabi=ilp32f" } */
 int foo()
 {
 }
diff --git a/gcc/testsuite/gcc.target/riscv/arch-32.c b/gcc/testsuite/gcc.target/riscv/arch-32.c
index 49616832512..49a3db79489 100644
--- a/gcc/testsuite/gcc.target/riscv/arch-32.c
+++ b/gcc/testsuite/gcc.target/riscv/arch-32.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv64iv_zvfbfmin -mabi=lp64d" } */
+/* { dg-options "-march=rv64imv_zvfbfmin -mabi=lp64d" } */
 int foo()
 {
 }
diff --git a/gcc/testsuite/gcc.target/riscv/arch-37.c b/gcc/testsuite/gcc.target/riscv/arch-37.c
index 5b19a73c556..b56ba77b973 100644
--- a/gcc/testsuite/gcc.target/riscv/arch-37.c
+++ b/gcc/testsuite/gcc.target/riscv/arch-37.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv32i_zvfbfwma -mabi=ilp32f" } */
+/* { dg-options "-march=rv32im_zvfbfwma -mabi=ilp32f" } */
 int
 foo ()
 {}
diff --git a/gcc/testsuite/gcc.target/riscv/arch-38.c b/gcc/testsuite/gcc.target/riscv/arch-38.c
index cee3efebe75..164a91e38a3 100644
--- a/gcc/testsuite/gcc.target/riscv/arch-38.c
+++ b/gcc/testsuite/gcc.target/riscv/arch-38.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv64iv_zvfbfwma -mabi=lp64d" } */
+/* { dg-options "-march=rv64imv_zvfbfwma -mabi=lp64d" } */
 int
 foo ()
 {}
diff --git a/gcc/testsuite/gcc.target/riscv/compare-debug-1.c b/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
index d65bb287b9a..c22e967f03d 100644
--- a/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
+++ b/gcc/testsuite/gcc.target/riscv/compare-debug-1.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64iv -mabi=lp64d -fcompare-debug" } */
+/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64imv -mabi=lp64d -fcompare-debug" } */
 
 
 void
diff --git a/gcc/testsuite/gcc.target/riscv/compare-debug-2.c b/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
index d87758475e4..be9bda17b59 100644
--- a/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
+++ b/gcc/testsuite/gcc.target/riscv/compare-debug-2.c
@@ -1,3 +1,3 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64iv -mabi=lp64d -fno-dce -fschedule-insns -fcompare-debug" } */
+/* { dg-options "-O -fno-tree-ch --param=max-completely-peel-times=0 -march=rv64imv -mabi=lp64d -fno-dce -fschedule-insns -fcompare-debug" } */
 #include "compare-debug-1.c"
diff --git a/gcc/testsuite/gcc.target/riscv/predef-14.c b/gcc/testsuite/gcc.target/riscv/predef-14.c
index 4815150ddfa..138209a0169 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-14.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-14.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv32iv -mabi=ilp32 -mcmodel=medlow -misa-spec=2.2" } */
+/* { dg-options "-march=rv32imv -mabi=ilp32 -mcmodel=medlow -misa-spec=2.2" } */
 
 int main () {
 
@@ -27,8 +27,8 @@  int main () {
 #error "__riscv_a"
 #endif
 
-#if defined(__riscv_m)
-#error "__riscv_m"
+#if !defined(__riscv_mul)
+#error "__riscv_mul"
 #endif
 
 #if !defined(__riscv_f)
diff --git a/gcc/testsuite/gcc.target/riscv/predef-15.c b/gcc/testsuite/gcc.target/riscv/predef-15.c
index dad14952ade..fd119dc7492 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-15.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-15.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv64iv_zvl512b -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
+/* { dg-options "-march=rv64imv_zvl512b -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
 
 int main () {
 
@@ -27,7 +27,7 @@  int main () {
 #error "__riscv_a"
 #endif
 
-#if defined(__riscv_m)
+#if !defined(__riscv_m)
 #error "__riscv_m"
 #endif
 
diff --git a/gcc/testsuite/gcc.target/riscv/predef-16.c b/gcc/testsuite/gcc.target/riscv/predef-16.c
index faebc1ab4f2..d64b8dc56eb 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-16.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-16.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv64i_zve64f -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
+/* { dg-options "-march=rv64im_zve64f -mabi=lp64 -mcmodel=medlow -misa-spec=2.2" } */
 
 int main () {
 
@@ -27,7 +27,7 @@  int main () {
 #error "__riscv_a"
 #endif
 
-#if defined(__riscv_m)
+#if !defined(__riscv_m)
 #error "__riscv_m"
 #endif
 
diff --git a/gcc/testsuite/gcc.target/riscv/predef-26.c b/gcc/testsuite/gcc.target/riscv/predef-26.c
index 285f64bd6c0..df0f05e4550 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-26.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-26.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv64i_zvfhmin -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv64im_zvfhmin -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
 
 int main () {
 
@@ -15,6 +15,10 @@  int main () {
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/predef-27.c b/gcc/testsuite/gcc.target/riscv/predef-27.c
index 0f9ab4417a6..554acf36e5c 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-27.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-27.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv64i_zvfh -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv64im_zvfh -mabi=lp64f -mcmodel=medlow -misa-spec=20191213" } */
 
 int main () {
 
@@ -15,6 +15,10 @@  int main () {
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/predef-32.c b/gcc/testsuite/gcc.target/riscv/predef-32.c
index 7417e0d996f..6d56f8fe6b8 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-32.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-32.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv32i_zvfbfmin -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv32im_zvfbfmin -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
 
 int main () {
 
@@ -15,6 +15,10 @@  int main () {
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/predef-33.c b/gcc/testsuite/gcc.target/riscv/predef-33.c
index 74d05bc9719..f1da7e582af 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-33.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-33.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv64iv_zvfbfmin -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv64imv_zvfbfmin -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
 
 int main () {
 
@@ -15,6 +15,10 @@  int main () {
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/predef-36.c b/gcc/testsuite/gcc.target/riscv/predef-36.c
index b0205b08513..7c87a42f3d3 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-36.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-36.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv32i_zvfbfwma -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv32im_zvfbfwma -mabi=ilp32f -mcmodel=medlow -misa-spec=20191213" } */
 
 int
 main ()
@@ -16,6 +16,10 @@  main ()
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/predef-37.c b/gcc/testsuite/gcc.target/riscv/predef-37.c
index b5aa41102f4..150150e3246 100644
--- a/gcc/testsuite/gcc.target/riscv/predef-37.c
+++ b/gcc/testsuite/gcc.target/riscv/predef-37.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=rv64iv_zvfbfwma -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
+/* { dg-options "-O2 -march=rv64imv_zvfbfwma -mabi=lp64d -mcmodel=medlow -misa-spec=20191213" } */
 
 int
 main ()
@@ -16,6 +16,10 @@  main ()
 #error "__riscv_i"
 #endif
 
+#if !defined(__riscv_m)
+#error "__riscv_m"
+#endif
+
 #if !defined(__riscv_f)
 #error "__riscv_f"
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
index 2ba2a363399..483e9b931f6 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr111486.c
@@ -1,5 +1,5 @@ 
 /* { dg-do compile } */
-/* { dg-options "-march=rv64iv -mabi=lp64d -O2" } */
+/* { dg-options "-march=rv64imv -mabi=lp64d -O2" } */
 
 typedef char __attribute__((__vector_size__ (1))) V;
 
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c
new file mode 100644
index 00000000000..6819a786aec
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr116036.c
@@ -0,0 +1,11 @@ 
+/* { dg-do compile } */
+/* { dg-options "-march=rv64idv -mabi=lp64d -O3" } */
+
+int a[15][15];
+void init() {
+  for (int i_0 ; i_0 < 15 ; ++i_0)
+    for (int i_1 = 0; i_1 < 15; ++i_1)
+      a[i_0][i_1] = 1;
+}
+
+/* { dg-excess-errors "sorry, unimplemented: the 'V' extension requires the 'M' extension" } */