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| author | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-01-28 15:43:03 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-01-28 15:43:03 +0100 |
| commit | 0bfbca5868fae1912db33ae4ab341d6e08bd68b4 (patch) | |
| tree | 2a2bfc3d290925073d4af913ae01b69cfbf1aa53 /gcc/ChangeLog | |
| parent | dd8b9ddea2288c96124367bf66ce060eb1049872 (diff) | |
| download | gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.zip gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.tar.gz gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.tar.bz2 | |
re PR tree-optimization/56125 (-O2 -ffast-math generates bad code when dividing a double by the square of another double.)
PR tree-optimization/56125
* tree-ssa-math-opts.c (gimple_expand_builtin_pow): Don't optimize
pow(x,c) into sqrt(x) * powi(x, n/2) or
1.0 / (sqrt(x) * powi(x, abs(n/2))) if c is an integer or when
optimizing for size.
Don't optimize pow(x,c) into powi(x, n/3) * powi(cbrt(x), n%3) or
1.0 / (powi(x, abs(n)/3) * powi(cbrt(x), abs(n)%3)) if 2c is an
integer.
* gcc.dg/pr56125.c: New test.
From-SVN: r195507
Diffstat (limited to 'gcc/ChangeLog')
| -rw-r--r-- | gcc/ChangeLog | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c96ccd2..3b3eed8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,14 @@ 2013-01-28 Jakub Jelinek <jakub@redhat.com> + PR tree-optimization/56125 + * tree-ssa-math-opts.c (gimple_expand_builtin_pow): Don't optimize + pow(x,c) into sqrt(x) * powi(x, n/2) or + 1.0 / (sqrt(x) * powi(x, abs(n/2))) if c is an integer or when + optimizing for size. + Don't optimize pow(x,c) into powi(x, n/3) * powi(cbrt(x), n%3) or + 1.0 / (powi(x, abs(n)/3) * powi(cbrt(x), abs(n)%3)) if 2c is an + integer. + PR tree-optimization/56094 * gimplify.c (force_gimple_operand_1): Temporarily set input_location to UNKNOWN_LOCATION while gimplifying expr. @@ -11,19 +20,18 @@ operand 0 in movabs insn template for -masm=intel asm alternative. (*movabs<mode>_2): Ditto for operand 1. -2013-01-26 David Holsgrove <david.holsgrove@xilinx.com> +2013-01-26 David Holsgrove <david.holsgrove@xilinx.com> PR target/54663 * config.gcc (microblaze*-linux*): Add tmake_file to allow building of microblaze-c.o -2013-01-26 Edgar E. Iglesias <edgar.iglesias@gmail.com> +2013-01-26 Edgar E. Iglesias <edgar.iglesias@gmail.com> * config.gcc (microblaze*-*-*): Rename microblaze*-*-elf, update tm_file. - -2013-01-25 Naveen H.S <Naveen.Hurugalawadi@caviumnetworks.com> +2013-01-25 Naveen H.S <Naveen.Hurugalawadi@caviumnetworks.com> * config/aarch64/aarch64.c (TARGET_FIXED_CONDITION_CODE_REGS): Undef to avoid warning. @@ -369,7 +377,7 @@ * config/aarch64/arm_neon.h: Map scalar types to standard types. -2013-01-18 Alexandre Oliva <aoliva@redhat.com> +2013-01-18 Alexandre Oliva <aoliva@redhat.com> PR debug/54114 PR debug/54402 @@ -392,13 +400,13 @@ cache, respectively. * alias.c (rtx_equal_for_memref_p): Compare operands of ENTRY_VALUEs. -2013-01-18 Alexandre Oliva <aoliva@redhat.com> +2013-01-18 Alexandre Oliva <aoliva@redhat.com> PR libmudflap/53359 * tree-mudflap.c (mudflap_finish_file): Skip deferred decls not found in the symtab. -2013-01-18 Alexandre Oliva <aoliva@redhat.com> +2013-01-18 Alexandre Oliva <aoliva@redhat.com> PR debug/56006 PR rtl-optimization/55547 @@ -542,7 +550,7 @@ (expand_atomic_load): Ditto. (expand_atomic_store): Ditto. -2013-01-16 Alexandre Oliva <aoliva@redhat.com> +2013-01-16 Alexandre Oliva <aoliva@redhat.com> PR rtl-optimization/55547 PR rtl-optimization/53827 @@ -1101,7 +1109,7 @@ (asan_finish_file): Test it here instead. 2013-01-07 Nick Clifton <nickc@redhat.com> - Matthias Klose <doko@debian.org> + Matthias Klose <doko@debian.org> Doug Kwan <dougkwan@google.com> H.J. Lu <hongjiu.lu@intel.com> |