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re PR rtl-optimization/25890 (testsuite failure: gcc.c-torture/compile/20051228-1.c)

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2006-01-23  Paolo Bonzini  <bonzini@gnu.org>

        PR rtl-optimization/25890
        PR rtl-optimization/25905
        * combine.c (expand_compound_operation, expand_field_assignment):
        Fail if the bitfield's final position is out of bounds.

From-SVN: r110170
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Paolo Bonzini 2006-01-24 14:29:25 +00:00 committed by Paolo Bonzini
parent 1dc8e905c0
commit 81162f97bf
2 changed files with 13 additions and 5 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2006-01-23 Paolo Bonzini <bonzini@gnu.org>
PR rtl-optimization/25890
PR rtl-optimization/25905
* combine.c (expand_compound_operation, expand_field_assignment):
Fail if the bitfield's final position is out of bounds.
2006-01-24 Ian Lance Taylor <ian@airs.com>
PR middle-end/25930

11
gcc/combine.c
View File

@ -5640,8 +5640,9 @@ expand_compound_operation (rtx x)
len = INTVAL (XEXP (x, 1));
pos = INTVAL (XEXP (x, 2));
/* This should stay within the object being extracted, fail. */
gcc_assert (len + pos <= GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0))));
/* This should stay within the object being extracted, fail otherwise. */
if (len + pos > GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0))))
return x;
if (BITS_BIG_ENDIAN)
pos = GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0))) - len - pos;
@ -5800,9 +5801,9 @@ expand_field_assignment (rtx x)
pos = XEXP (SET_DEST (x), 2);
/* A constant position should stay within the width of INNER. */
if (GET_CODE (pos) == CONST_INT)
gcc_assert (INTVAL (pos) + len
<= GET_MODE_BITSIZE (GET_MODE (inner)));
if (GET_CODE (pos) == CONST_INT
&& INTVAL (pos) + len > GET_MODE_BITSIZE (GET_MODE (inner)))
break;
if (BITS_BIG_ENDIAN)
{