diff options
| -rw-r--r-- | gcc/dwarf2cfi.c | 58 |
1 files changed, 37 insertions, 21 deletions
diff --git a/gcc/dwarf2cfi.c b/gcc/dwarf2cfi.c index 9dd1dfe..b8aa805 100644 --- a/gcc/dwarf2cfi.c +++ b/gcc/dwarf2cfi.c @@ -1113,8 +1113,6 @@ dwf_cfa_reg (rtx reg) { struct cfa_reg result; - gcc_assert (REGNO (reg) < FIRST_PSEUDO_REGISTER); - result.reg = dwf_regno (reg); result.span = 1; result.span_width = 0; @@ -1144,6 +1142,28 @@ dwf_cfa_reg (rtx reg) return result; } +/* More efficient comparisons that don't call targetm.dwarf_register_span + unnecessarily. These cfa_reg vs. rtx comparisons should be done at + least for call-saved REGs that might not be CFA related (like stack + pointer, hard frame pointer or DRAP registers are), in other cases it is + just a compile time and memory optimization. */ + +static bool +operator== (cfa_reg &cfa, rtx reg) +{ + unsigned int regno = dwf_regno (reg); + if (cfa.reg != regno) + return false; + struct cfa_reg other = dwf_cfa_reg (reg); + return cfa == other; +} + +static inline bool +operator!= (cfa_reg &cfa, rtx reg) +{ + return !(cfa == reg); +} + /* Compare X and Y for equivalence. The inputs may be REGs or PC_RTX. */ static bool @@ -1313,7 +1333,7 @@ dwarf2out_frame_debug_adjust_cfa (rtx pat) switch (GET_CODE (src)) { case PLUS: - gcc_assert (dwf_cfa_reg (XEXP (src, 0)) == cur_cfa->reg); + gcc_assert (cur_cfa->reg == XEXP (src, 0)); cur_cfa->offset -= rtx_to_poly_int64 (XEXP (src, 1)); break; @@ -1346,11 +1366,11 @@ dwarf2out_frame_debug_cfa_offset (rtx set) switch (GET_CODE (addr)) { case REG: - gcc_assert (dwf_cfa_reg (addr) == cur_cfa->reg); + gcc_assert (cur_cfa->reg == addr); offset = -cur_cfa->offset; break; case PLUS: - gcc_assert (dwf_cfa_reg (XEXP (addr, 0)) == cur_cfa->reg); + gcc_assert (cur_cfa->reg == XEXP (addr, 0)); offset = rtx_to_poly_int64 (XEXP (addr, 1)) - cur_cfa->offset; break; default: @@ -1797,7 +1817,7 @@ dwarf2out_frame_debug_expr (rtx expr) { /* Setting FP from SP. */ case REG: - if (cur_cfa->reg == dwf_cfa_reg (src)) + if (cur_cfa->reg == src) { /* Rule 1 */ /* Update the CFA rule wrt SP or FP. Make sure src is @@ -1828,7 +1848,7 @@ dwarf2out_frame_debug_expr (rtx expr) { gcc_assert (REGNO (dest) == HARD_FRAME_POINTER_REGNUM && fde->drap_reg != INVALID_REGNUM - && cur_cfa->reg != dwf_cfa_reg (src) + && cur_cfa->reg != src && fde->rule18); fde->rule18 = 0; /* The save of hard frame pointer has been deferred @@ -1852,8 +1872,7 @@ dwarf2out_frame_debug_expr (rtx expr) /* Adjusting SP. */ if (REG_P (XEXP (src, 1))) { - gcc_assert (dwf_cfa_reg (XEXP (src, 1)) - == cur_trace->cfa_temp.reg); + gcc_assert (cur_trace->cfa_temp.reg == XEXP (src, 1)); offset = cur_trace->cfa_temp.offset; } else if (!poly_int_rtx_p (XEXP (src, 1), &offset)) @@ -1886,7 +1905,7 @@ dwarf2out_frame_debug_expr (rtx expr) gcc_assert (frame_pointer_needed); gcc_assert (REG_P (XEXP (src, 0)) - && dwf_cfa_reg (XEXP (src, 0)) == cur_cfa->reg); + && cur_cfa->reg == XEXP (src, 0)); offset = rtx_to_poly_int64 (XEXP (src, 1)); if (GET_CODE (src) != MINUS) offset = -offset; @@ -1899,7 +1918,7 @@ dwarf2out_frame_debug_expr (rtx expr) /* Rule 4 */ if (REG_P (XEXP (src, 0)) - && dwf_cfa_reg (XEXP (src, 0)) == cur_cfa->reg + && cur_cfa->reg == XEXP (src, 0) && poly_int_rtx_p (XEXP (src, 1), &offset)) { /* Setting a temporary CFA register that will be copied @@ -1914,7 +1933,7 @@ dwarf2out_frame_debug_expr (rtx expr) /* Rule 5 */ else if (REG_P (XEXP (src, 0)) - && dwf_cfa_reg (XEXP (src, 0)) == cur_trace->cfa_temp.reg + && cur_trace->cfa_temp.reg == XEXP (src, 0) && XEXP (src, 1) == stack_pointer_rtx) { /* Setting a scratch register that we will use instead @@ -1945,7 +1964,7 @@ dwarf2out_frame_debug_expr (rtx expr) /* Rule 7 */ case IOR: gcc_assert (REG_P (XEXP (src, 0)) - && dwf_cfa_reg (XEXP (src, 0)) == cur_trace->cfa_temp.reg + && cur_trace->cfa_temp.reg == XEXP (src, 0) && CONST_INT_P (XEXP (src, 1))); cur_trace->cfa_temp.reg = dwf_cfa_reg (dest); @@ -1981,7 +2000,7 @@ dwarf2out_frame_debug_expr (rtx expr) dwarf2out_flush_queued_reg_saves (); gcc_assert (cur_trace->cfa_store.reg - == dwf_cfa_reg (XEXP (src, 0))); + == XEXP (src, 0)); fde->stack_realign = 1; fde->stack_realignment = INTVAL (XEXP (src, 1)); cur_trace->cfa_store.offset = 0; @@ -2109,8 +2128,7 @@ dwarf2out_frame_debug_expr (rtx expr) /* Rule 14 */ case POST_INC: - gcc_assert (cur_trace->cfa_temp.reg - == dwf_cfa_reg (XEXP (XEXP (dest, 0), 0))); + gcc_assert (cur_trace->cfa_temp.reg == XEXP (XEXP (dest, 0), 0)); offset = -cur_trace->cfa_temp.offset; cur_trace->cfa_temp.offset -= GET_MODE_SIZE (GET_MODE (dest)); break; @@ -2128,7 +2146,7 @@ dwarf2out_frame_debug_expr (rtx expr) if (REG_P (src) && REGNO (src) != STACK_POINTER_REGNUM && REGNO (src) != HARD_FRAME_POINTER_REGNUM - && dwf_cfa_reg (src) == cur_cfa->reg) + && cur_cfa->reg == src) { /* We're storing the current CFA reg into the stack. */ @@ -3210,8 +3228,7 @@ create_cie_data (void) dw_cfa_location loc; dw_trace_info cie_trace; - dw_stack_pointer_regnum = dwf_cfa_reg (gen_rtx_REG (Pmode, - STACK_POINTER_REGNUM)); + dw_stack_pointer_regnum = dwf_cfa_reg (stack_pointer_rtx); memset (&cie_trace, 0, sizeof (cie_trace)); cur_trace = &cie_trace; @@ -3270,8 +3287,7 @@ static unsigned int execute_dwarf2_frame (void) { /* Different HARD_FRAME_POINTER_REGNUM might coexist in the same file. */ - dw_frame_pointer_regnum - = dwf_cfa_reg (gen_rtx_REG (Pmode, HARD_FRAME_POINTER_REGNUM)); + dw_frame_pointer_regnum = dwf_cfa_reg (hard_frame_pointer_rtx); /* The first time we're called, compute the incoming frame state. */ if (cie_cfi_vec == NULL) |