diff options
Diffstat (limited to 'gcc/rtl.c')
| -rw-r--r-- | gcc/rtl.c | 34 |
1 files changed, 26 insertions, 8 deletions
@@ -1,5 +1,5 @@ /* RTL utility routines. - Copyright (C) 1987-2016 Free Software Foundation, Inc. + Copyright (C) 1987-2017 Free Software Foundation, Inc. This file is part of GCC. @@ -318,10 +318,6 @@ copy_rtx (rtx orig) us to explicitly document why we are *not* copying a flag. */ copy = shallow_copy_rtx (orig); - /* We do not copy the USED flag, which is used as a mark bit during - walks over the RTL. */ - RTX_FLAG (copy, used) = 0; - format_ptr = GET_RTX_FORMAT (GET_CODE (copy)); for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++) @@ -367,7 +363,29 @@ shallow_copy_rtx_stat (const_rtx orig MEM_STAT_DECL) { const unsigned int size = rtx_size (orig); rtx const copy = ggc_alloc_rtx_def_stat (size PASS_MEM_STAT); - return (rtx) memcpy (copy, orig, size); + memcpy (copy, orig, size); + switch (GET_CODE (orig)) + { + /* RTX codes copy_rtx_if_shared_1 considers are shareable, + the used flag is often used for other purposes. */ + case REG: + case DEBUG_EXPR: + case VALUE: + CASE_CONST_ANY: + case SYMBOL_REF: + case CODE_LABEL: + case PC: + case CC0: + case RETURN: + case SIMPLE_RETURN: + case SCRATCH: + break; + default: + /* For all other RTXes clear the used flag on the copy. */ + RTX_FLAG (copy, used) = 0; + break; + } + return copy; } /* Nonzero when we are generating CONCATs. */ @@ -424,7 +442,7 @@ rtx_equal_p_cb (const_rtx x, const_rtx y, rtx_equal_p_callback_function cb) return (REGNO (x) == REGNO (y)); case LABEL_REF: - return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y); + return label_ref_label (x) == label_ref_label (y); case SYMBOL_REF: return XSTR (x, 0) == XSTR (y, 0); @@ -561,7 +579,7 @@ rtx_equal_p (const_rtx x, const_rtx y) return (REGNO (x) == REGNO (y)); case LABEL_REF: - return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y); + return label_ref_label (x) == label_ref_label (y); case SYMBOL_REF: return XSTR (x, 0) == XSTR (y, 0); |