diff options
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 32 |
1 files changed, 6 insertions, 26 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index d003de92..c03ff03 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -46,6 +46,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA #include "varray.h" #include "tree-pass.h" #include "ipa-type-escape.h" +#include "df.h" /* The aliasing API provided here solves related but different problems: @@ -839,7 +840,7 @@ find_base_value (rtx src) /* If we're inside init_alias_analysis, use new_reg_base_value to reduce the number of relaxation iterations. */ if (new_reg_base_value && new_reg_base_value[regno] - && REG_N_SETS (regno) == 1) + && DF_REG_DEF_COUNT (regno) == 1) return new_reg_base_value[regno]; if (VEC_index (rtx, reg_base_value, regno)) @@ -1087,27 +1088,6 @@ record_set (rtx dest, rtx set, void *data ATTRIBUTE_UNUSED) reg_seen[regno] = 1; } -/* Clear alias info for a register. This is used if an RTL transformation - changes the value of a register. This is used in flow by AUTO_INC_DEC - optimizations. We don't need to clear reg_base_value, since flow only - changes the offset. */ - -void -clear_reg_alias_info (rtx reg) -{ - unsigned int regno = REGNO (reg); - - if (regno >= FIRST_PSEUDO_REGISTER) - { - regno -= FIRST_PSEUDO_REGISTER; - if (regno < reg_known_value_size) - { - reg_known_value[regno] = reg; - reg_known_equiv_p[regno] = false; - } - } -} - /* If a value is known for REGNO, return it. */ rtx @@ -2433,7 +2413,7 @@ init_alias_analysis (void) the optimization level or flag_expensive_optimizations. We could propagate more information in the first pass by making use - of REG_N_SETS to determine immediately that the alias information + of DF_REG_DEF_COUNT to determine immediately that the alias information for a pseudo is "constant". A program with an uninitialized variable can cause an infinite loop @@ -2514,7 +2494,7 @@ init_alias_analysis (void) note = find_reg_equal_equiv_note (insn); if (note && REG_NOTE_KIND (note) == REG_EQUAL - && REG_N_SETS (regno) != 1) + && DF_REG_DEF_COUNT (regno) != 1) note = NULL_RTX; if (note != NULL_RTX @@ -2527,7 +2507,7 @@ init_alias_analysis (void) set_reg_known_equiv_p (regno, REG_NOTE_KIND (note) == REG_EQUIV); } - else if (REG_N_SETS (regno) == 1 + else if (DF_REG_DEF_COUNT (regno) == 1 && GET_CODE (src) == PLUS && REG_P (XEXP (src, 0)) && (t = get_reg_known_value (REGNO (XEXP (src, 0)))) @@ -2537,7 +2517,7 @@ init_alias_analysis (void) set_reg_known_value (regno, t); set_reg_known_equiv_p (regno, 0); } - else if (REG_N_SETS (regno) == 1 + else if (DF_REG_DEF_COUNT (regno) == 1 && ! rtx_varies_p (src, 1)) { set_reg_known_value (regno, src); |