Skip to content

R
riscv-gcc-1
Commit 4a969847 by Richard Kenner
Options

(expand_{binop,unop}): Don't make invalid paradoxical SUBREGs. 

From-SVN: r1995
parent 803090c4
Showing with 12 additions and 4 deletions
gcc/optabs.c
...@@ -454,14 +454,17 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) ...@@ -454,14 +454,17 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
/* For certain integer operations, we need not actually extend /* For certain integer operations, we need not actually extend
the narrow operands, as long as we will truncate the narrow operands, as long as we will truncate
the results to the same narrowness. */ the results to the same narrowness. Don't do this when
WIDER_MODE is wider than a word since a paradoxical SUBREG
isn't valid for such modes. */
if ((binoptab == ior_optab || binoptab == and_optab if ((binoptab == ior_optab || binoptab == and_optab
|| binoptab == xor_optab || binoptab == xor_optab
|| binoptab == add_optab || binoptab == sub_optab || binoptab == add_optab || binoptab == sub_optab
|| binoptab == smul_optab || binoptab == smul_optab
|| binoptab == ashl_optab || binoptab == lshl_optab) || binoptab == ashl_optab || binoptab == lshl_optab)
&& class == MODE_INT) && class == MODE_INT
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD)
no_extend = 1; no_extend = 1;
/* If an operand is a constant integer, we might as well /* If an operand is a constant integer, we might as well
...@@ -879,14 +882,17 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) ...@@ -879,14 +882,17 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
/* For certain integer operations, we need not actually extend /* For certain integer operations, we need not actually extend
the narrow operands, as long as we will truncate the narrow operands, as long as we will truncate
the results to the same narrowness. */ the results to the same narrowness. Don't do this when
WIDER_MODE is wider than a word since a paradoxical SUBREG
isn't valid for such modes. */
if ((binoptab == ior_optab || binoptab == and_optab if ((binoptab == ior_optab || binoptab == and_optab
|| binoptab == xor_optab || binoptab == xor_optab
|| binoptab == add_optab || binoptab == sub_optab || binoptab == add_optab || binoptab == sub_optab
|| binoptab == smul_optab || binoptab == smul_optab
|| binoptab == ashl_optab || binoptab == lshl_optab) || binoptab == ashl_optab || binoptab == lshl_optab)
&& class == MODE_INT) && class == MODE_INT
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD)
no_extend = 1; no_extend = 1;
/* If an operand is a constant integer, we might as well /* If an operand is a constant integer, we might as well
...@@ -1207,6 +1213,7 @@ expand_unop (mode, unoptab, op0, target, unsignedp) ...@@ -1207,6 +1213,7 @@ expand_unop (mode, unoptab, op0, target, unsignedp)
results to the same narrowness. */ results to the same narrowness. */
if ((unoptab == neg_optab || unoptab == one_cmpl_optab) if ((unoptab == neg_optab || unoptab == one_cmpl_optab)
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD
&& class == MODE_INT) && class == MODE_INT)
xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0); xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0);
else else
...@@ -1304,6 +1311,7 @@ expand_unop (mode, unoptab, op0, target, unsignedp) ...@@ -1304,6 +1311,7 @@ expand_unop (mode, unoptab, op0, target, unsignedp)
results to the same narrowness. */ results to the same narrowness. */
if ((unoptab == neg_optab || unoptab == one_cmpl_optab) if ((unoptab == neg_optab || unoptab == one_cmpl_optab)
&& GET_MODE_SIZE (wider_mode) <= UNITS_PER_WORD
&& class == MODE_INT) && class == MODE_INT)
xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0); xop0 = gen_rtx (SUBREG, wider_mode, force_reg (mode, xop0), 0);
else else
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment