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| author | Bernd Schmidt <bernds@codesourcery.com> | 2011-09-13 20:40:53 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2011-09-13 20:40:53 +0000 |
| commit | 43052d458619645b576eff628bedcd02cdad2a2e (patch) | |
| tree | d7f07a98f652d9df0af95a74a6a37c347bbe58d7 /gcc | |
| parent | a5baf3b8ced93d9a633f3994bc649f0892f0d306 (diff) | |
| download | gcc-43052d458619645b576eff628bedcd02cdad2a2e.zip gcc-43052d458619645b576eff628bedcd02cdad2a2e.tar.gz gcc-43052d458619645b576eff628bedcd02cdad2a2e.tar.bz2 | |
cfgcleanup.c (try_head_merge_bb): If get_condition returns NULL for a jump that is a cc0 insn...
* cfgcleanup.c (try_head_merge_bb): If get_condition returns
NULL for a jump that is a cc0 insn, pick the previous insn for
move_before.
* gcc.c-torture/compile/20110913-1.c: New test.
From-SVN: r178834
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/cfgcleanup.c | 18 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/20110913-1.c | 26 |
4 files changed, 52 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 47a09ae..74b187a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2011-09-13 Bernd Schmidt <bernds@codesourcery.com> + + * cfgcleanup.c (try_head_merge_bb): If get_condition returns + NULL for a jump that is a cc0 insn, pick the previous insn for + move_before. + 2011-09-13 Richard Sandiford <rdsandiford@googlemail.com> * config/v850/v850.md: Use match_test rather than eq/ne symbol_ref diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c index 396057c..20a409c 100644 --- a/gcc/cfgcleanup.c +++ b/gcc/cfgcleanup.c @@ -2214,7 +2214,14 @@ try_head_merge_bb (basic_block bb) cond = get_condition (jump, &move_before, true, false); if (cond == NULL_RTX) - move_before = jump; + { +#ifdef HAVE_cc0 + if (reg_mentioned_p (cc0_rtx, jump)) + move_before = prev_nonnote_nondebug_insn (jump); + else +#endif + move_before = jump; + } for (ix = 0; ix < nedges; ix++) if (EDGE_SUCC (bb, ix)->dest == EXIT_BLOCK_PTR) @@ -2376,7 +2383,14 @@ try_head_merge_bb (basic_block bb) jump = BB_END (final_dest_bb); cond = get_condition (jump, &move_before, true, false); if (cond == NULL_RTX) - move_before = jump; + { +#ifdef HAVE_cc0 + if (reg_mentioned_p (cc0_rtx, jump)) + move_before = prev_nonnote_nondebug_insn (jump); + else +#endif + move_before = jump; + } } do diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 67ccf26..95a0643 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2011-09-13 Bernd Schmidt <bernds@codesourcery.com> + + * gcc.c-torture/compile/20110913-1.c: New test. + 2011-09-13 Janus Weil <janus@gcc.gnu.org> PR fortran/50379 diff --git a/gcc/testsuite/gcc.c-torture/compile/20110913-1.c b/gcc/testsuite/gcc.c-torture/compile/20110913-1.c new file mode 100644 index 0000000..e435a14 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20110913-1.c @@ -0,0 +1,26 @@ +struct ieee754_double { + double d; +}; +extern const float __exp_deltatable[178]; +float __ieee754_expf (float x) +{ + static const float himark = 88.72283935546875; + static const float lomark = -103.972084045410; + if (__builtin_isless(x, himark) && __builtin_isgreater(x, lomark)) + { + int tval; + double x22, t, result, dx; + float delta; + struct ieee754_double ex2_u; + dx -= t; + tval = (int) (t * 512.0); + if (t >= 0) + delta = - __exp_deltatable[tval]; + else + delta = __exp_deltatable[-tval]; + x22 = (0.5000000496709180453 * dx + 1.0000001192102037084) * dx + delta; + result = x22 * ex2_u.d + ex2_u.d; + return (float) result; + } + return x; +} |