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(force_to_mode, LSHIFTRT case): Avoid shifts larger

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than HOST_BITS_PER_WIDE_INT.

From-SVN: r5516
This commit is contained in:
Jim Wilson 1993-09-28 16:00:13 -07:00
parent b5e9625567
commit 1347292b88
1 changed files with 4 additions and 2 deletions
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6
gcc/combine.c
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@ -5771,10 +5771,12 @@ force_to_mode (x, mode, mask, reg)
break;
case LSHIFTRT:
/* Here we can only do something if the shift count is a constant and
we can do arithmetic in OP_MODE. */
/* Here we can only do something if the shift count is a constant,
this shift constant is valid for the host, and we can do arithmetic
in OP_MODE. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) < HOST_BITS_PER_WIDE_INT
&& GET_MODE_BITSIZE (op_mode) <= HOST_BITS_PER_WIDE_INT)
{
rtx inner = XEXP (x, 0);