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re PR target/65730 (xtensa: ICE in libstdc++-v3/include/bits/atomic_base.h: In function ‘bool std::atomic_flag_test_and_set_explicit(std::__atomic_flag_base*, std::memory_order)’)

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Fix PR target/65730

2015-05-20  Max Filippov  <jcmvbkbc@gmail.com>
gcc/
	* config/xtensa/xtensa.c (init_alignment_context): Replace MULT
	by BITS_PER_UNIT with ASHIFT by exact_log2 (BITS_PER_UNIT).

From-SVN: r223452
This commit is contained in:
Max Filippov 2015-05-20 18:56:14 +00:00 committed by Max Filippov
parent eb3243e854
commit 91767ed11a
2 changed files with 8 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-05-20 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.c (init_alignment_context): Replace MULT
by BITS_PER_UNIT with ASHIFT by exact_log2 (BITS_PER_UNIT).
2015-05-20 Jeff Law <law@redhat.com>
* tree-ssa-threadupdate.c (mark_threaded_blocks): Properly

5
gcc/config/xtensa/xtensa.c
View File

@ -1461,8 +1461,9 @@ init_alignment_context (struct alignment_context *ac, rtx mem)
if (ac->shift != NULL_RTX)
{
/* Shift is the byte count, but we need the bitcount. */
ac->shift = expand_simple_binop (SImode, MULT, ac->shift,
GEN_INT (BITS_PER_UNIT),
gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0);
ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift,
GEN_INT (exact_log2 (BITS_PER_UNIT)),
NULL_RTX, 1, OPTAB_DIRECT);
ac->modemask = expand_simple_binop (SImode, ASHIFT,
GEN_INT (GET_MODE_MASK (mode)),