diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/gcc/flow.c b/gcc/flow.c index 2694a0b07e0..7ad7a803ef9 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -136,7 +136,6 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "toplev.h" #include "recog.h" #include "expr.h" -#include "ssa.h" #include "timevar.h" #include "obstack.h" @@ -293,7 +292,6 @@ static void notice_stack_pointer_modification_1 (rtx, rtx, void *); static void notice_stack_pointer_modification (rtx); static void mark_reg (rtx, void *); static void mark_regs_live_at_end (regset); -static int set_phi_alternative_reg (rtx, int, int, void *); static void calculate_global_regs_live (sbitmap, sbitmap, int); static void propagate_block_delete_insn (rtx); static rtx propagate_block_delete_libcall (rtx, rtx); @@ -1033,20 +1031,6 @@ mark_regs_live_at_end (regset set) diddle_return_value (mark_reg, set); } -/* Callback function for for_each_successor_phi. DATA is a regset. - Sets the SRC_REGNO, the regno of the phi alternative for phi node - INSN, in the regset. */ - -static int -set_phi_alternative_reg (rtx insn ATTRIBUTE_UNUSED, - int dest_regno ATTRIBUTE_UNUSED, int src_regno, - void *data) -{ - regset live = (regset) data; - SET_REGNO_REG_SET (live, src_regno); - return 0; -} - /* Propagate global life info around the graph of basic blocks. Begin considering blocks with their corresponding bit set in BLOCKS_IN. If BLOCKS_IN is null, consider it the universal set. @@ -1208,14 +1192,6 @@ calculate_global_regs_live (sbitmap blocks_in, sbitmap blocks_out, int flags) SET_REGNO_REG_SET (new_live_at_end, PIC_OFFSET_TABLE_REGNUM); } - /* Regs used in phi nodes are not included in - global_live_at_start, since they are live only along a - particular edge. Set those regs that are live because of a - phi node alternative corresponding to this particular block. */ - if (in_ssa_form) - for_each_successor_phi (bb, &set_phi_alternative_reg, - new_live_at_end); - if (bb == ENTRY_BLOCK_PTR) { COPY_REG_SET (bb->global_live_at_end, new_live_at_end); @@ -3908,14 +3884,6 @@ mark_used_regs (struct propagate_block_info *pbi, rtx x, rtx cond, rtx insn) x = COND_EXEC_CODE (x); goto retry; - case PHI: - /* We _do_not_ want to scan operands of phi nodes. Operands of - a phi function are evaluated only when control reaches this - block along a particular edge. Therefore, regs that appear - as arguments to phi should not be added to the global live at - start. */ - return; - default: break; } |