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re PR middle-end/44769 (warning for split_double when HOST_BITS_PER_WIDE_INT < BITS_PER_WORD)

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PR middle-end/44769
	* final.c (split_double): Don't use BITS_PER_WORD directly in
	shift count.

From-SVN: r166662
This commit is contained in:
Joern Rennecke 2010-11-12 17:24:16 +00:00 • committed by Joern Rennecke
parent d3c176fcaf
commit ae77ff7a03
2 changed files with 7 additions and 2 deletions
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4
gcc/ChangeLog
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@ -67,6 +67,10 @@
(bfin_expand_builtin): Likewise.
Set tmode before use.
PR middle-end/44769
* final.c (split_double): Don't use BITS_PER_WORD directly in
shift count.
2010-11-12 Eric Botcazou <ebotcazou@adacore.com>
PR debug/46375

5
gcc/final.c
View file

@ -3807,10 +3807,11 @@ split_double (rtx value, rtx *first, rtx *second)
Sign extend each half to HOST_WIDE_INT. */
unsigned HOST_WIDE_INT low, high;
unsigned HOST_WIDE_INT mask, sign_bit, sign_extend;
unsigned bits_per_word = BITS_PER_WORD;
/* Set sign_bit to the most significant bit of a word. */
sign_bit = 1;
sign_bit <<= BITS_PER_WORD - 1;
sign_bit <<= bits_per_word - 1;
/* Set mask so that all bits of the word are set. We could
have used 1 << BITS_PER_WORD instead of basing the
@ -3833,7 +3834,7 @@ split_double (rtx value, rtx *first, rtx *second)
/* Pick the higher word, shifted to the least significant
bits, and sign-extend it. */
high = INTVAL (value);
high >>= BITS_PER_WORD - 1;
high >>= bits_per_word - 1;
high >>= 1;
high &= mask;
if (high & sign_bit)