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re PR bootstrap/88133 (Build fails with host GCC < 4.3)

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2018-11-21  Richard Biener  <rguenther@suse.de>

	PR bootstrap/88133
	* bitmap.c (bitmap_last_set_bit): Refactor to avoid warning.
	* Makefile.in (bitmap.o-warn): Remove again.

From-SVN: r266344
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Richard Biener 2018-11-21 14:19:17 +00:00 committed by Richard Biener
parent 0f9657f377
commit 566422e03b
3 changed files with 8 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-11-21 Richard Biener <rguenther@suse.de>
PR bootstrap/88133
* bitmap.c (bitmap_last_set_bit): Refactor to avoid warning.
* Makefile.in (bitmap.o-warn): Remove again.
2018-11-20 Jeff Law <law@redhat.com>
PR tree-optimization/88069

1
gcc/Makefile.in
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@ -221,7 +221,6 @@ libgcov-merge-tool.o-warn = -Wno-error
gimple-match.o-warn = -Wno-unused
generic-match.o-warn = -Wno-unused
dfp.o-warn = -Wno-strict-aliasing
bitmap.o-warn = -Wno-error=array-bounds # PR 87926
# All warnings have to be shut off in stage1 if the compiler used then
# isn't gcc; configure determines that. WARN_CFLAGS will be either

4
gcc/bitmap.c
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@ -1186,13 +1186,13 @@ bitmap_last_set_bit (const_bitmap a)
elt = elt->next;
bit_no = elt->indx * BITMAP_ELEMENT_ALL_BITS;
for (ix = BITMAP_ELEMENT_WORDS - 1; ix >= 0; ix--)
for (ix = BITMAP_ELEMENT_WORDS - 1; ix >= 1; ix--)
{
word = elt->bits[ix];
if (word)
goto found_bit;
}
gcc_unreachable ();
gcc_assert (elt->bits[ix] != 0);
found_bit:
bit_no += ix * BITMAP_WORD_BITS;
#if GCC_VERSION >= 3004