From: Thomas Koenig Date: Sun, 26 Feb 2017 13:22:43 +0000 (+0000) Subject: re PR libfortran/51119 (MATMUL slow for large matrices) X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c7b608a9f7d5785714e9d46548ee0f5f85b109be;p=gcc.git re PR libfortran/51119 (MATMUL slow for large matrices) 2017-02-26 Thomas Koenig PR fortran/51119 * options.c (gfc_post_options): Set default limit for matmul inlining to 30. * invoke.texi: Document change. 2017-02-26 Thomas Koenig PR fortran/51119 * gfortran.dg/inline_matmul_1.f90: Scan optimized dump instead of original. * gfortran.dg/inline_matmul_11.f90: Likewise. * gfortran.dg/inline_matmul_9.f90: Likewise. * gfortran.dg/matmul_13.f90: New test. * gfortran.dg/matmul_14.f90: New test. From-SVN: r245745 --- diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog index 6ee14745adf..e3af1c5e943 100644 --- a/gcc/fortran/ChangeLog +++ b/gcc/fortran/ChangeLog @@ -1,3 +1,10 @@ +2017-02-26 Thomas Koenig + + PR fortran/51119 + * options.c (gfc_post_options): Set default limit for matmul + inlining to 30. + * invoke.texi: Document change. + 2017-02-25 Dominique d'Humieres PR fortran/79601 diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi index 2a89647f9f0..636432fead8 100644 --- a/gcc/fortran/invoke.texi +++ b/gcc/fortran/invoke.texi @@ -1629,9 +1629,8 @@ for matrices with size up to @var{n}. If the matrices involved are not square, the size comparison is performed using the geometric mean of the dimensions of the argument and result matrices. -The default value for @var{n} is the value specified for -@code{-fblas-matmul-limit} if this option is specified, or unlimitited -otherwise. +The default value for @var{n} is 30. The @code{-fblas-matmul-limit} +can be used to change this value. @item -frecursive @opindex @code{frecursive} diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c index dc8df5b8ed3..1af76aa81ec 100644 --- a/gcc/fortran/options.c +++ b/gcc/fortran/options.c @@ -388,10 +388,16 @@ gfc_post_options (const char **pfilename) if (!flag_automatic) flag_max_stack_var_size = 0; - /* If we call BLAS directly, only inline up to the BLAS limit. */ + /* If the user did not specify an inline matmul limit, inline up to the BLAS + limit or up to 30 if no external BLAS is specified. */ - if (flag_external_blas && flag_inline_matmul_limit < 0) - flag_inline_matmul_limit = flag_blas_matmul_limit; + if (flag_inline_matmul_limit < 0) + { + if (flag_external_blas) + flag_inline_matmul_limit = flag_blas_matmul_limit; + else + flag_inline_matmul_limit = 30; + } /* Optimization implies front end optimization, unless the user specified it directly. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index e2850e84f88..30198a6bfe3 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,13 @@ +2017-02-26 Thomas Koenig + + PR fortran/51119 + * gfortran.dg/inline_matmul_1.f90: Scan optimized dump instead + of original. + * gfortran.dg/inline_matmul_11.f90: Likewise. + * gfortran.dg/inline_matmul_9.f90: Likewise. + * gfortran.dg/matmul_13.f90: New test. + * gfortran.dg/matmul_14.f90: New test. + 2017-02-25 Jakub Jelinek PR middle-end/79396 diff --git a/gcc/testsuite/gfortran.dg/inline_matmul_1.f90 b/gcc/testsuite/gfortran.dg/inline_matmul_1.f90 index 266aad073d4..c3177d72361 100644 --- a/gcc/testsuite/gfortran.dg/inline_matmul_1.f90 +++ b/gcc/testsuite/gfortran.dg/inline_matmul_1.f90 @@ -1,5 +1,5 @@ ! { dg-do run } -! { dg-options "-ffrontend-optimize -fdump-tree-original -Wrealloc-lhs" } +! { dg-options "-ffrontend-optimize -fdump-tree-optimized -Wrealloc-lhs" } ! PR 37131 - check basic functionality of inlined matmul, making ! sure that the library is not called, with and without reallocation. @@ -149,4 +149,4 @@ program main end program main -! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "original" } } +! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "optimized" } } diff --git a/gcc/testsuite/gfortran.dg/inline_matmul_11.f90 b/gcc/testsuite/gfortran.dg/inline_matmul_11.f90 index 783c83c729a..016d8d701cb 100644 --- a/gcc/testsuite/gfortran.dg/inline_matmul_11.f90 +++ b/gcc/testsuite/gfortran.dg/inline_matmul_11.f90 @@ -1,5 +1,5 @@ ! { dg-do run } -! { dg-additional-options "-ffrontend-optimize -fdump-tree-original" } +! { dg-additional-options "-ffrontend-optimize -fdump-tree-optimized" } ! PR fortran/66176 - inline conjg for matml. program main complex, dimension(3,2) :: a @@ -29,4 +29,4 @@ program main c = matmul(conjg(a), b) if (any(conjg(c) /= res2)) call abort end program main -! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "original" } } +! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "optimized" } } diff --git a/gcc/testsuite/gfortran.dg/inline_matmul_9.f90 b/gcc/testsuite/gfortran.dg/inline_matmul_9.f90 index 67b9fcad398..901cd96e24f 100644 --- a/gcc/testsuite/gfortran.dg/inline_matmul_9.f90 +++ b/gcc/testsuite/gfortran.dg/inline_matmul_9.f90 @@ -1,5 +1,5 @@ ! { dg-do run } -! { dg-options "-ffrontend-optimize -fdump-tree-original" } +! { dg-options "-ffrontend-optimize -fdump-tree-optimized" } ! PR 66041 - this used to ICE with an incomplete fix for the PR. program main implicit none @@ -21,4 +21,4 @@ program main if (any (c2-reshape([248., -749.],shape(c2)) /= 0.)) call abort end program main -! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "original" } } +! { dg-final { scan-tree-dump-times "_gfortran_matmul" 0 "optimized" } } diff --git a/gcc/testsuite/gfortran.dg/matmul_13.f90 b/gcc/testsuite/gfortran.dg/matmul_13.f90 new file mode 100644 index 00000000000..3262d1a8dd3 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/matmul_13.f90 @@ -0,0 +1,12 @@ +! { dg-do compile } +! { dg-options "-O3 -fdump-tree-optimized" } +! Check that the default limit of 30 for inlining matmul applies. +program main + integer, parameter :: n = 31 + real, dimension(n,n) :: a, b, c + call random_number(a) + call random_number(b) + c = matmul(a,b) + print *,sum(c) +end program main +! { dg-final { scan-tree-dump-times "_gfortran_matmul_r4" 1 "optimized" } } diff --git a/gcc/testsuite/gfortran.dg/matmul_14.f90 b/gcc/testsuite/gfortran.dg/matmul_14.f90 new file mode 100644 index 00000000000..5c2b3f274ee --- /dev/null +++ b/gcc/testsuite/gfortran.dg/matmul_14.f90 @@ -0,0 +1,12 @@ +! { dg-do compile } +! { dg-options "-O3 -fdump-tree-optimized" } +! Check that the default limit of 30 for inlining matmul applies. +program main + integer, parameter :: n = 30 + real, dimension(n,n) :: a, b, c + call random_number(a) + call random_number(b) + c = matmul(a,b) + print *,sum(c) +end program main +! { dg-final { scan-tree-dump-times "_gfortran_matmul_r4" 0 "optimized" } }