diff options
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index a87c519..5a4b5f2 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -187,6 +187,10 @@ static rtx make_call_insn_raw PROTO((rtx)); static rtx find_line_note PROTO((rtx)); static void mark_sequence_stack PROTO((struct sequence_stack *)); +/* There are some RTL codes that require special attention; the generation + functions do the raw handling. If you add to this list, modify + special_rtx in gengenrtl.c as well. */ + rtx gen_rtx_CONST_INT (mode, arg) enum machine_mode mode; @@ -247,21 +251,22 @@ gen_rtx_REG (mode, regno) if (mode == Pmode && !reload_in_progress) { - if (regno == FRAME_POINTER_REGNUM) + if (frame_pointer_rtx != 0 && regno == FRAME_POINTER_REGNUM) return frame_pointer_rtx; #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM - if (regno == HARD_FRAME_POINTER_REGNUM) + if (hard_frame_pointer_rtx != 0 && regno == HARD_FRAME_POINTER_REGNUM) return hard_frame_pointer_rtx; #endif #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && HARD_FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM - if (regno == ARG_POINTER_REGNUM) + if (arg_pointer_rtx != 0 && regno == ARG_POINTER_REGNUM) return arg_pointer_rtx; #endif #ifdef RETURN_ADDRESS_POINTER_REGNUM - if (regno == RETURN_ADDRESS_POINTER_REGNUM) + if (return_address_pointer_rtx != 0 + && regno == RETURN_ADDRESS_POINTER_REGNUM) return return_address_pointer_rtx; #endif - if (regno == STACK_POINTER_REGNUM) + if (stack_pointer_rtx != 0 && regno == STACK_POINTER_REGNUM) return stack_pointer_rtx; } @@ -281,7 +286,7 @@ gen_rtx_MEM (mode, addr) return rt; } - + /* rtx gen_rtx (code, mode, [element1, ..., elementn]) ** ** This routine generates an RTX of the size specified by @@ -747,6 +752,9 @@ gen_lowpart_common (mode, x) i = INTVAL (x); r = REAL_VALUE_FROM_TARGET_SINGLE (i); + /* Avoid changing the bit pattern of a NaN. */ + if (REAL_VALUE_ISNAN (r)) + return 0; return CONST_DOUBLE_FROM_REAL_VALUE (r, mode); } #else @@ -785,6 +793,8 @@ gen_lowpart_common (mode, x) i[0] = low, i[1] = high; r = REAL_VALUE_FROM_TARGET_DOUBLE (i); + if (REAL_VALUE_ISNAN (r)) + return 0; return CONST_DOUBLE_FROM_REAL_VALUE (r, mode); } #else @@ -1478,7 +1488,8 @@ reverse_comparison (insn) } else { - rtx new = gen_rtx_COMPARE (VOIDmode, CONST0_RTX (GET_MODE (comp)), comp); + rtx new = gen_rtx_COMPARE (VOIDmode, + CONST0_RTX (GET_MODE (comp)), comp); if (GET_CODE (body) == SET) SET_SRC (body) = new; else @@ -2105,7 +2116,8 @@ link_cc0_insns (insn) if (GET_CODE (user) == INSN && GET_CODE (PATTERN (user)) == SEQUENCE) user = XVECEXP (PATTERN (user), 0, 0); - REG_NOTES (user) = gen_rtx_INSN_LIST (REG_CC_SETTER, insn, REG_NOTES (user)); + REG_NOTES (user) = gen_rtx_INSN_LIST (REG_CC_SETTER, insn, + REG_NOTES (user)); REG_NOTES (insn) = gen_rtx_INSN_LIST (REG_CC_USER, user, REG_NOTES (insn)); } @@ -3541,6 +3553,8 @@ init_emit_once (line_numbers) /* Create the unique rtx's for certain rtx codes and operand values. */ + /* Don't use gen_rtx here since gen_rtx in this case + tries to use these variables. */ for (i = - MAX_SAVED_CONST_INT; i <= MAX_SAVED_CONST_INT; i++) { PUT_CODE (&const_int_rtx[i + MAX_SAVED_CONST_INT], CONST_INT); @@ -3648,7 +3662,8 @@ init_emit_once (line_numbers) #ifdef STATIC_CHAIN_INCOMING_REGNUM if (STATIC_CHAIN_INCOMING_REGNUM != STATIC_CHAIN_REGNUM) - static_chain_incoming_rtx = gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); + static_chain_incoming_rtx + = gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); else #endif static_chain_incoming_rtx = static_chain_rtx; |