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| author | Jeff Law <law@redhat.com> | 2015-12-20 21:49:02 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2015-12-20 21:49:02 -0700 |
| commit | 091534a9f44229b2643d84a0bfe0f07e678a3772 (patch) | |
| tree | 814ab378430a168deedc959e3060adb489ed13ec | |
| parent | 58688a4ec04a2e3d73e2a381f0003f888ad305d1 (diff) | |
| download | gcc-091534a9f44229b2643d84a0bfe0f07e678a3772.zip gcc-091534a9f44229b2643d84a0bfe0f07e678a3772.tar.gz gcc-091534a9f44229b2643d84a0bfe0f07e678a3772.tar.bz2 | |
re PR tree-optimization/64910 (tree reassociation results in poor code)
PR tree-optimization/64910
* config/i386/i386.md (testqi_ext_3): Allow HImode.
PR tree-optimization/64910
* gcc.target/i386/bittest.c: New test.
From-SVN: r231871
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.md | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/bittest.c | 22 |
4 files changed, 33 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f77d391..733c2898 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-12-20 Jeff Law <law@redhat.com> + + PR tree-optimization/64910 + * config/i386/i386.md (testqi_ext_3): Allow HImode. + 2015-12-20 Andrew Pinsi <apinski@cavium.com> * config/aarch64/atomics.md diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 49b2216..e8178f3 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -7868,7 +7868,7 @@ ;; Combine likes to form bit extractions for some tests. Humor it. (define_insn "*testqi_ext_3" [(set (reg FLAGS_REG) - (compare (zero_extract:SWI48 + (compare (zero_extract:SWI248 (match_operand 0 "nonimmediate_operand" "rm") (match_operand 1 "const_int_operand" "n") (match_operand 2 "const_int_operand" "n")) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 6a3e044..725ddef 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2015-12-20 Jeff Law <law@redhat.com> + + PR tree-optimization/64910 + * gcc.target/i386/bittest.c: New test. + 2015-12-20 Eric Botcazou <ebotcazou@adacore.com> * gnat.dg/complex1.adb: New test. diff --git a/gcc/testsuite/gcc.target/i386/bittest.c b/gcc/testsuite/gcc.target/i386/bittest.c new file mode 100644 index 0000000..7b7ce9e --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/bittest.c @@ -0,0 +1,22 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ + +extern int dbg_cnt (void); + +struct function +{ + unsigned int calls_setjmp:1; +}; +extern struct function *cfun; +unsigned char +gate_rtl_cprop (void) +{ + return !(cfun + 0)->calls_setjmp && dbg_cnt (); +} + +/* This should be implementable without performing a bitmask as we can + just use a test imm,mem. So instructions which load the object from + memory and mask off bits are unnecessary. In theory we can just count + the move-with-extension, and and testb instructions. There should be + only one. */ +/* { dg-final { scan-assembler-times "movzbl|and|testb" 1 { target { i?86-*-* x86_64-*-*} } } } */ |