diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 10 | ||||
| -rw-r--r-- | gcc/cfgexpand.c | 7 | ||||
| -rw-r--r-- | gcc/function.c | 19 |
3 files changed, 25 insertions, 11 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e547c62..abd648e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,7 +1,15 @@ +2015-12-07 Eric Botcazou <ebotcazou@adacore.com> + + PR middle-end/68291 + PR middle-end/68292 + * cfgexpand.c (set_rtl): Always accept PARALLELs with BLKmode for + SSA names based on RESULT_DECLs. + * function.c (expand_function_start): Do not create BLKmode REGs + for GIMPLE registers when coalescing is enabled. + 2015-12-07 Bernd Edlinger <bernd.edlinger@hotmail.de> * final.c (shorten_branches): Fix check for basic asm. - * ipa-icf-gimple.c (func_checker::compare_gimple_asm): Add check for basic asm. diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 0cf4172..5338c25 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -184,10 +184,15 @@ set_rtl (tree t, rtx x) || SUBREG_P (XEXP (x, 0))) && (REG_P (XEXP (x, 1)) || SUBREG_P (XEXP (x, 1)))) + /* We need to accept PARALLELs for RESUT_DECLs + because of vector types with BLKmode returned + in multiple registers, but they are supposed + to be uncoalesced. */ || (GET_CODE (x) == PARALLEL && SSAVAR (t) && TREE_CODE (SSAVAR (t)) == RESULT_DECL - && !flag_tree_coalesce_vars)) + && (GET_MODE (x) == BLKmode + || !flag_tree_coalesce_vars))) : (MEM_P (x) || x == pc_rtx || (GET_CODE (x) == CONCAT && MEM_P (XEXP (x, 0)) diff --git a/gcc/function.c b/gcc/function.c index e452865..b513ead 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -5148,15 +5148,16 @@ expand_function_start (tree subr) /* Compute the return values into a pseudo reg, which we will copy into the true return register after the cleanups are done. */ tree return_type = TREE_TYPE (res); - /* If we may coalesce this result, make sure it has the expected - mode. */ - if (flag_tree_coalesce_vars && is_gimple_reg (res)) - { - tree def = ssa_default_def (cfun, res); - gcc_assert (def); - machine_mode mode = promote_ssa_mode (def, NULL); - set_parm_rtl (res, gen_reg_rtx (mode)); - } + + /* If we may coalesce this result, make sure it has the expected mode + in case it was promoted. But we need not bother about BLKmode. */ + machine_mode promoted_mode + = flag_tree_coalesce_vars && is_gimple_reg (res) + ? promote_ssa_mode (ssa_default_def (cfun, res), NULL) + : BLKmode; + + if (promoted_mode != BLKmode) + set_parm_rtl (res, gen_reg_rtx (promoted_mode)); else if (TYPE_MODE (return_type) != BLKmode && targetm.calls.return_in_msb (return_type)) /* expand_function_end will insert the appropriate padding in |