diff options
| author | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-29 07:47:38 +0000 |
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| committer | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-29 07:47:38 +0000 |
| commit | 26d37ce2ed0ec6d735e6453528b49974eae29660 (patch) | |
| tree | bf73d49798603b7cda5fa78d4b6f41f2eae2abea /gcc/lra-constraints.c | |
| parent | 26003052293947e0dc703c3367b4b22a8811d478 (diff) | |
| download | gcc-26d37ce2ed0ec6d735e6453528b49974eae29660.tar.gz | |
2013-01-29 Basile Starynkevitch <basile@starynkevitch.net>
MELT branch merged with trunk rev 195526 using svnmerge.py
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@195528 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 01c8cf143cf..03728b78f42 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -1847,11 +1847,27 @@ process_alt_operands (int only_alternative) int const_to_mem = 0; bool no_regs_p; + /* If this alternative asks for a specific reg class, see if there + is at least one allocatable register in that class. */ no_regs_p = (this_alternative == NO_REGS || (hard_reg_set_subset_p (reg_class_contents[this_alternative], lra_no_alloc_regs))); + + /* For asms, verify that the class for this alternative is possible + for the mode that is specified. */ + if (!no_regs_p && REG_P (op) && INSN_CODE (curr_insn) < 0) + { + int i; + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + if (HARD_REGNO_MODE_OK (i, mode) + && in_hard_reg_set_p (reg_class_contents[this_alternative], mode, i)) + break; + if (i == FIRST_PSEUDO_REGISTER) + winreg = false; + } + /* If this operand accepts a register, and if the register class has at least one allocatable register, then this operand can be reloaded. */ @@ -2742,10 +2758,6 @@ curr_insn_transform (void) swap_operands (commutative); } - /* The operands don't meet the constraints. goal_alt describes the - alternative that we could reach by reloading the fewest operands. - Reload so as to fit it. */ - if (! alt_p && ! sec_mem_p) { /* No alternative works with reloads?? */ |