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re PR middle-end/36447 (simplify_subreg ICE with right shift more than length type AVR)

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PR middle-end/36447
* simplify-rtx.c (simplify_subreg): Add check for shift count greater than size.

From-SVN: r136602
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Andy Hutchinson 2008-06-09 22:38:34 +00:00 committed by Andy Hutchinson
parent 5cb0cd01c1
commit 3115c00d85
2 changed files with 7 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2008-06-09 Andy Hutchinson <hutchinsonandy@aim.com>
PR middle-end/36447
* simplify-rtx.c (simplify_subreg): Add check for shift count
greater than size.
2008-06-09 Richard Sandiford <rdsandiford@googlemail.com>
* doc/md.texi: Synchronize with later constraints.md change.

1
gcc/simplify-rtx.c
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@ -5265,6 +5265,7 @@ simplify_subreg (enum machine_mode outermode, rtx op,
&& GET_MODE_BITSIZE (innermode) >= (2 * GET_MODE_BITSIZE (outermode))
&& GET_CODE (XEXP (op, 1)) == CONST_INT
&& (INTVAL (XEXP (op, 1)) & (GET_MODE_BITSIZE (outermode) - 1)) == 0
&& INTVAL (XEXP (op, 1)) < GET_MODE_BITSIZE (innermode)
&& byte == subreg_lowpart_offset (outermode, innermode))
{
int shifted_bytes = INTVAL (XEXP (op, 1)) / BITS_PER_UNIT;