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| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-02 19:34:38 +0000 |
|---|---|---|
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-02 19:34:38 +0000 |
| commit | c259678fdd8088668cb71fe2d6c00920ea24f815 (patch) | |
| tree | db8ded671097465c0fd2ce2c9d3774344bcda7fc /gcc/ira.c | |
| parent | 61e26f31fae6b504f618bed1f6eb41018572ecc3 (diff) | |
| download | gcc-c259678fdd8088668cb71fe2d6c00920ea24f815.tar.gz | |
gcc/
* ira.h (target_ira): Add x_ira_class_singleton.
(ira_class_singleton): New macro.
* ira.c (setup_prohibited_class_mode_regs): Set up ira_class_singleton.
* ira-build.c (update_conflict_hard_reg_costs): Use
ira_class_singleton to check for classes with a single
allocatable register.
* ira-lives.c (ira_implicitly_set_insn_hard_regs): Likewise.
(single_reg_class): Likewise. When more than one class is specified,
check whether they have the same singleton register.
(process_single_reg_class_operands): Require single_reg_class
to return NO_REGS or a class with a single allocatable register.
Obtain that register from ira_class_singleton.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191995 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ira.c')
| -rw-r--r-- | gcc/ira.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/gcc/ira.c b/gcc/ira.c index ad0ae0a8e6e..8436f606d97 100644 --- a/gcc/ira.c +++ b/gcc/ira.c @@ -1451,16 +1451,21 @@ setup_reg_class_nregs (void) -/* Set up IRA_PROHIBITED_CLASS_MODE_REGS. */ +/* Set up IRA_PROHIBITED_CLASS_MODE_REGS and IRA_CLASS_SINGLETON. + This function is called once IRA_CLASS_HARD_REGS has been initialized. */ static void setup_prohibited_class_mode_regs (void) { - int j, k, hard_regno, cl; + int j, k, hard_regno, cl, last_hard_regno, count; for (cl = (int) N_REG_CLASSES - 1; cl >= 0; cl--) { + COPY_HARD_REG_SET (temp_hard_regset, reg_class_contents[cl]); + AND_COMPL_HARD_REG_SET (temp_hard_regset, no_unit_alloc_regs); for (j = 0; j < NUM_MACHINE_MODES; j++) { + count = 0; + last_hard_regno = -1; CLEAR_HARD_REG_SET (ira_prohibited_class_mode_regs[cl][j]); for (k = ira_class_hard_regs_num[cl] - 1; k >= 0; k--) { @@ -1468,7 +1473,14 @@ setup_prohibited_class_mode_regs (void) if (! HARD_REGNO_MODE_OK (hard_regno, (enum machine_mode) j)) SET_HARD_REG_BIT (ira_prohibited_class_mode_regs[cl][j], hard_regno); + else if (in_hard_reg_set_p (temp_hard_regset, + (enum machine_mode) j, hard_regno)) + { + last_hard_regno = hard_regno; + count++; + } } + ira_class_singleton[cl][j] = (count == 1 ? last_hard_regno : -1); } } } |