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Fix a warning

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From-SVN: r19422
This commit is contained in:
Michael Meissner 1998-04-27 06:20:13 +00:00 • committed by Michael Meissner
parent 14bf4a33ec
commit 563c063f76
2 changed files with 11 additions and 2 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
Mon Apr 27 08:55:23 1998 Michael Meissner <meissner@cygnus.com>
* final.c (split_double): Avoid a compiler warning if
BITS_PER_WORD is less than or equal to HOST_BIT_PER_WIDE_INT.
* rtl.h (JUMP_{CROSS_JUMP,NOOP_MOVES,AFTER_REGSCAN}): New macros
for calling jump_optimize.

10
gcc/final.c
View file

@ -3680,9 +3680,15 @@ split_double (value, first, second)
Extract the bits from it into two word-sized pieces.
Sign extend each half to HOST_WIDE_INT. */
rtx low, high;
/* On machines where HOST_BITS_PER_WIDE_INT == BITS_PER_WORD
the shift below will cause a compiler warning, even though
this code won't be executed. So put the shift amounts in
variables to avoid the warning. */
int rshift = HOST_BITS_PER_WIDE_INT - BITS_PER_WORD;
int lshift = HOST_BITS_PER_WIDE_INT - 2 * BITS_PER_WORD;
low = GEN_INT (INTVAL (value) << (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD) >> (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD));
high = GEN_INT (INTVAL (value) << (HOST_BITS_PER_WIDE_INT - 2 * BITS_PER_WORD) >> (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD));
low = GEN_INT ((INTVAL (value) << rshift) >> rshift);
high = GEN_INT ((INTVAL (value) << lshift) >> rshift);
if (WORDS_BIG_ENDIAN)
{
*first = high;