diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/df-scan.c | 11 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr79985.c | 12 |
4 files changed, 22 insertions, 11 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5eb3480..270c979 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2018-05-23 Alexander Monakov <amonakov@ispras.ru> + PR rtl-optimization/79985 + * df-scan.c (df_insn_refs_collect): Remove special case for + global registers and asm statements. + +2018-05-23 Alexander Monakov <amonakov@ispras.ru> + * extend.texi (Global Register Variables): Rewrite the bullet list. Note that the register is available for allocation. Note that access via inline asm must use constraints. Add note about async-signal diff --git a/gcc/df-scan.c b/gcc/df-scan.c index 95e1e0d..cbb08fc 100644 --- a/gcc/df-scan.c +++ b/gcc/df-scan.c @@ -3207,17 +3207,6 @@ df_insn_refs_collect (struct df_collection_rec *collection_rec, if (CALL_P (insn_info->insn)) df_get_call_refs (collection_rec, bb, insn_info, flags); - if (asm_noperands (PATTERN (insn_info->insn)) >= 0) - for (unsigned i = 0; i < FIRST_PSEUDO_REGISTER; i++) - if (global_regs[i]) - { - /* As with calls, asm statements reference all global regs. */ - df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i], - NULL, bb, insn_info, DF_REF_REG_USE, flags); - df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i], - NULL, bb, insn_info, DF_REF_REG_DEF, flags); - } - /* Record other defs. These should be mostly for DF_REF_REGULAR, so that a qsort on the defs is unnecessary in most cases. */ df_defs_record (collection_rec, diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index b3cf4b1..5b16f44 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2018-05-23 Alexander Monakov <amonakov@ispras.ru> + + * gcc.dg/pr79985.c: New testcase. + 2018-05-23 Richard Biener <rguenther@suse.de> * gcc.dg/tree-ssa/ssa-fre-66.c: New testcase. diff --git a/gcc/testsuite/gcc.dg/pr79985.c b/gcc/testsuite/gcc.dg/pr79985.c new file mode 100644 index 0000000..7b5a5b2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr79985.c @@ -0,0 +1,12 @@ +/* PR rtl-optimization/79985 */ +/* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */ +/* { dg-options "-O3 -fschedule-insns -fselective-scheduling" } */ + +long a; +int b; +void +c () +{ + __asm("" : "=r"(a) : "0"(c)); + __asm("" : "=r"(b)); +} |