diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr61572.c | 46 | ||||
| -rw-r--r-- | gcc/tree-ssa-sink.c | 6 |
4 files changed, 63 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b82e840..15e16bf 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-06-24 Richard Biener <rguenther@suse.de> + + PR tree-optimization/61572 + * tree-ssa-sink.c (statement_sink_location): Do not sink + loads from hard registers. + 2014-06-24 Jakub Jelinek <jakub@redhat.com> * gimplify.c (gimplify_omp_for): For #pragma omp for simd iterator diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 279d4ee..9bd9a21 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2014-06-24 Richard Biener <rguenther@suse.de> + + PR tree-optimization/61572 + * gcc.target/i386/pr61572.c: New testcase. + 2014-06-24 Jakub Jelinek <jakub@redhat.com> * gfortran.dg/gomp/udr2.f90 (f7, f9): Add !$omp parallel with diff --git a/gcc/testsuite/gcc.target/i386/pr61572.c b/gcc/testsuite/gcc.target/i386/pr61572.c new file mode 100644 index 0000000..3456333 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr61572.c @@ -0,0 +1,46 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ + +struct autofs_sb_info +{ + int exp_timeout; +}; +void *f; +int g; +static int fn1 (struct autofs_sb_info *p1) +{ + int a, b; + a = ( + { + register __typeof__(0) c +#if defined __x86_64__ + asm("rdx") +#endif + ; + b = c; + int d; + __typeof__(0) e; + e = p1->exp_timeout / 1000; + switch (0) + default: + asm("" : "=a"(d) : "0"(e), ""(0)); + d; + }); + if (a) + return 1; + if (b) + p1->exp_timeout = 0; + return 0; +} + +int fn2 () +{ + struct autofs_sb_info *h = f; + switch (g) + { + case 0 ?: +0 : return fn1 (h); + default: + return 0; + } +} diff --git a/gcc/tree-ssa-sink.c b/gcc/tree-ssa-sink.c index f7485ef..fb7310d 100644 --- a/gcc/tree-ssa-sink.c +++ b/gcc/tree-ssa-sink.c @@ -374,6 +374,12 @@ statement_sink_location (gimple stmt, basic_block frombb, nearest to commondom. */ if (gimple_vuse (stmt)) { + /* Do not sink loads from hard registers. */ + if (gimple_assign_single_p (stmt) + && TREE_CODE (gimple_assign_rhs1 (stmt)) == VAR_DECL + && DECL_HARD_REGISTER (gimple_assign_rhs1 (stmt))) + return false; + imm_use_iterator imm_iter; use_operand_p use_p; basic_block found = NULL; |