diff options
Diffstat (limited to 'gcc/config/cris/cris.c')
| -rw-r--r-- | gcc/config/cris/cris.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/gcc/config/cris/cris.c b/gcc/config/cris/cris.c index a4c61b41e61..314ae0f7e4e 100644 --- a/gcc/config/cris/cris.c +++ b/gcc/config/cris/cris.c @@ -125,7 +125,7 @@ static bool cris_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode, tree, bool); static int cris_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode, tree, bool); -static tree cris_md_asm_clobbers (tree); +static tree cris_md_asm_clobbers (tree, tree, tree); /* This is the argument from the "-max-stack-stackframe=" option. */ const char *cris_max_stackframe_str; @@ -3060,8 +3060,38 @@ cris_arg_partial_bytes (CUMULATIVE_ARGS *ca, enum machine_mode mode, /* Worker function for TARGET_MD_ASM_CLOBBERS. */ static tree -cris_md_asm_clobbers (tree clobbers) +cris_md_asm_clobbers (tree outputs, tree inputs, tree clobbers) { + HARD_REG_SET mof_set; + tree t; + + CLEAR_HARD_REG_SET (mof_set); + SET_HARD_REG_BIT (mof_set, CRIS_MOF_REGNUM); + + for (t = outputs; t != NULL; t = TREE_CHAIN (t)) + { + tree val = TREE_VALUE (t); + + /* The constraint letter for the singleton register class of MOF + is 'h'. If it's mentioned in the constraints, the asm is + MOF-aware and adding it to the clobbers would cause it to have + impossible constraints. */ + if (strchr (TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))), + 'h') != NULL + || decl_overlaps_hard_reg_set_p (val, mof_set)) + return clobbers; + } + + for (t = inputs; t != NULL; t = TREE_CHAIN (t)) + { + tree val = TREE_VALUE (t); + + if (strchr (TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))), + 'h') != NULL + || decl_overlaps_hard_reg_set_p (val, mof_set)) + return clobbers; + } + return tree_cons (NULL_TREE, build_string (strlen (reg_names[CRIS_MOF_REGNUM]), reg_names[CRIS_MOF_REGNUM]), |