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riscv-gcc-1
Commit f3f391d7 by Richard Kenner
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(expand_binop, expand_unop): Don't make SUBREG for promoted variables as 

operands.

From-SVN: r2179
parent 09d7f5a5
Showing with 24 additions and 9 deletions
gcc/optabs.c
......@@ -474,15 +474,20 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
/* If an operand is a constant integer, we might as well
convert it since that is more efficient than using a SUBREG,
unlike the case for other operands. */
unlike the case for other operands. Similarly for
SUBREGs that were made due to promoted objects. */
if (no_extend && GET_MODE (xop0) != VOIDmode)
if (no_extend && GET_MODE (xop0) != VOIDmode
&& ! (GET_CODE (xop0) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop0)))
xop0 = gen_rtx (SUBREG, wider_mode,
force_reg (GET_MODE (xop0), xop0), 0);
else
xop0 = convert_to_mode (wider_mode, xop0, unsignedp);
if (no_extend && GET_MODE (xop1) != VOIDmode)
if (no_extend && GET_MODE (xop1) != VOIDmode
&& ! (GET_CODE (xop1) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop1)))
xop1 = gen_rtx (SUBREG, wider_mode,
force_reg (GET_MODE (xop1), xop1), 0);
else
......@@ -1133,15 +1138,20 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
/* If an operand is a constant integer, we might as well
convert it since that is more efficient than using a SUBREG,
unlike the case for other operands. */
unlike the case for other operands. Similarly for
SUBREGs that were made due to promoted objects.*/
if (no_extend && GET_MODE (xop0) != VOIDmode)
if (no_extend && GET_MODE (xop0) != VOIDmode
&& ! (GET_CODE (xop0) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop0)))
xop0 = gen_rtx (SUBREG, wider_mode,
force_reg (GET_MODE (xop0), xop0), 0);
else
xop0 = convert_to_mode (wider_mode, xop0, unsignedp);
if (no_extend && GET_MODE (xop1) != VOIDmode)
if (no_extend && GET_MODE (xop1) != VOIDmode
&& ! (GET_CODE (xop1) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop1)))
xop1 = gen_rtx (SUBREG, wider_mode,
force_reg (GET_MODE (xop1), xop1), 0);
else
......@@ -1456,11 +1466,14 @@ expand_unop (mode, unoptab, op0, target, unsignedp)
/* For certain operations, we need not actually extend
the narrow operand, as long as we will truncate the
results to the same narrowness. */
results to the same narrowness. But it is faster to
convert a SUBREG due to mode promotion. */
if ((unoptab == neg_optab || unoptab == one_cmpl_optab)
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD
&& class == MODE_INT)
&& class == MODE_INT
&& ! (GET_CODE (xop0) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop0)))
xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0);
else
xop0 = convert_to_mode (wider_mode, xop0, unsignedp);
......@@ -1558,7 +1571,9 @@ expand_unop (mode, unoptab, op0, target, unsignedp)
if ((unoptab == neg_optab || unoptab == one_cmpl_optab)
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD
&& class == MODE_INT)
&& class == MODE_INT
&& ! (GET_CODE (xop0) == SUBREG
&& SUBREG_PROMOTED_VAR_P (xop0)))
xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0);
else
xop0 = convert_to_mode (wider_mode, xop0, unsignedp);
......
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