Commit 566422e0 by Richard Biener Committed by Richard Biener

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

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
parent 0f9657f3
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> 2018-11-20 Jeff Law <law@redhat.com>
PR tree-optimization/88069 PR tree-optimization/88069
...@@ -221,7 +221,6 @@ libgcov-merge-tool.o-warn = -Wno-error ...@@ -221,7 +221,6 @@ libgcov-merge-tool.o-warn = -Wno-error
gimple-match.o-warn = -Wno-unused gimple-match.o-warn = -Wno-unused
generic-match.o-warn = -Wno-unused generic-match.o-warn = -Wno-unused
dfp.o-warn = -Wno-strict-aliasing 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 # 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 # isn't gcc; configure determines that. WARN_CFLAGS will be either
......
...@@ -1186,13 +1186,13 @@ bitmap_last_set_bit (const_bitmap a) ...@@ -1186,13 +1186,13 @@ bitmap_last_set_bit (const_bitmap a)
elt = elt->next; elt = elt->next;
bit_no = elt->indx * BITMAP_ELEMENT_ALL_BITS; 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]; word = elt->bits[ix];
if (word) if (word)
goto found_bit; goto found_bit;
} }
gcc_unreachable (); gcc_assert (elt->bits[ix] != 0);
found_bit: found_bit:
bit_no += ix * BITMAP_WORD_BITS; bit_no += ix * BITMAP_WORD_BITS;
#if GCC_VERSION >= 3004 #if GCC_VERSION >= 3004
......
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