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| author | Hans-Peter Nilsson <hp@axis.com> | 2005-03-23 03:55:36 +0000 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@gcc.gnu.org> | 2005-03-23 03:55:36 +0000 |
| commit | 61158923135f19faa41c7ec297b630a1437e13cc (patch) | |
| tree | 1170a3a1c1f2485f21dace07e688e18f211fa1b8 /gcc/config/cris | |
| parent | 06cd9d722014967a0769f4771edf4a3f3953b087 (diff) | |
| download | gcc-61158923135f19faa41c7ec297b630a1437e13cc.zip gcc-61158923135f19faa41c7ec297b630a1437e13cc.tar.gz gcc-61158923135f19faa41c7ec297b630a1437e13cc.tar.bz2 | |
tm.texi (TARGET_MD_ASM_CLOBBERS): Adjust wording to not imply that this is called once, independent of asms in code.
* doc/tm.texi (TARGET_MD_ASM_CLOBBERS): Adjust wording to not
imply that this is called once, independent of asms in code.
Adjust to now being pased output and input lists. Mention helper
function decl_overlaps_hard_reg_set_p.
* hooks.c (hook_tree_tree_tree_tree_3rd_identity): Rename from
hook_tree_tree_identity and to take three trees, returning third.
* hooks.h (hook_tree_tree_tree_tree_3rd_identity): Adjust the
prototype.
* stmt.c: include hard-reg-set.h before tree.h.
(decl_overlaps_hard_reg_set_p): New function, broken out from...
(decl_conflicts_with_clobbers_p): Call
decl_overlaps_hard_reg_set_p.
(expand_asm_operands): Pass output and input lists in call to
targetm.md_asm_clobbers.
* target-def.h (TARGET_MD_ASM_CLOBBERS): Define as
hook_tree_tree_tree_tree_3rd_identity.
* target.h (struct gcc_target.md_asm_clobbers): Take three tree
parameters.
* tree.h [HARD_CONST] (decl_overlaps_hard_reg_set_p): Prototype.
* config/i386/i386.c (ix86_md_asm_clobbers): Adjust to three
parameters, first two unused.
* config/cris/cris.c (cris_md_asm_clobbers): Adjust to added
parameters. Only add MOF to clobbers if there's no 'h' mentioned
in constraint letters and MOF is not mentioned as a asm-declared
register in neither of the input and output lists.
From-SVN: r96923
Diffstat (limited to 'gcc/config/cris')
| -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 a4c61b4..314ae0f 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]), |