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| author | Martin Liska <mliska@suse.cz> | 2018-09-05 13:28:49 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2018-09-05 11:28:49 +0000 |
| commit | e6c5d9f0f586b303a4d292b42e1e8d705651f86c (patch) | |
| tree | 1b7c60da9489ea13350cf717f48e317704be88d9 /gcc | |
| parent | 85004cb2dcc43010001d6231cf6aca6eb769d2c3 (diff) | |
| download | gcc-e6c5d9f0f586b303a4d292b42e1e8d705651f86c.zip gcc-e6c5d9f0f586b303a4d292b42e1e8d705651f86c.tar.gz gcc-e6c5d9f0f586b303a4d292b42e1e8d705651f86c.tar.bz2 | |
Group switch cases in switch lowering (PR tree-optimization/87205).
2018-09-05 Martin Liska <mliska@suse.cz>
PR tree-optimization/87205
* tree-switch-conversion.c (pass_lower_switch::execute):
Group cases for switch statements.
2018-09-05 Martin Liska <mliska@suse.cz>
PR tree-optimization/87205
* gcc.dg/tree-ssa/pr87205-2.c: New test.
* gcc.dg/tree-ssa/pr87205.c: New test.
From-SVN: r264124
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr87205-2.c | 18 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr87205.c | 21 | ||||
| -rw-r--r-- | gcc/tree-switch-conversion.c | 9 |
5 files changed, 58 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 47bc612..8386829 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-09-05 Martin Liska <mliska@suse.cz> + + PR tree-optimization/87205 + * tree-switch-conversion.c (pass_lower_switch::execute): + Group cases for switch statements. + 2018-09-05 Richard Biener <rguenther@suse.de> PR tree-optimization/87217 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 12bb8a2..fc40df0 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2018-09-05 Martin Liska <mliska@suse.cz> + + PR tree-optimization/87205 + * gcc.dg/tree-ssa/pr87205-2.c: New test. + * gcc.dg/tree-ssa/pr87205.c: New test. + 2018-09-05 Richard Biener <rguenther@suse.de> PR tree-optimization/87217 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr87205-2.c b/gcc/testsuite/gcc.dg/tree-ssa/pr87205-2.c new file mode 100644 index 0000000..fb1879e --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr87205-2.c @@ -0,0 +1,18 @@ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +void f(int); +void h(unsigned i) +{ + switch (i) { + default: __builtin_unreachable(); + case 0: f(42); break; + case 1: f(42); break; + case 2: f(42); break; + case 3: f(42); break; + case 4: f(42); break; + case 5: f(42); break; + } +} + +/* { dg-final { scan-tree-dump-not "if" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "switch" "optimized" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr87205.c b/gcc/testsuite/gcc.dg/tree-ssa/pr87205.c new file mode 100644 index 0000000..129e607 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr87205.c @@ -0,0 +1,21 @@ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +void f( int x ); + +void h( unsigned ix ) +{ + switch( ix ) + { + case 0: f(42); break; + case 1: f(42); break; + case 2: f(42); break; + case 3: f(42); break; + case 4: f(42); break; + case 5: f(42); break; + default: __builtin_unreachable(); + } +} + + +/* { dg-final { scan-tree-dump-not "if" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "switch" "optimized" } } */ diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index 1f543b2..64169a6 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -2419,8 +2419,13 @@ pass_lower_switch<O0>::execute (function *fun) FOR_EACH_BB_FN (bb, fun) { gimple *stmt = last_stmt (bb); - if (stmt && gimple_code (stmt) == GIMPLE_SWITCH) - switch_statements.safe_push (stmt); + gswitch *swtch; + if (stmt && (swtch = dyn_cast<gswitch *> (stmt))) + { + if (!O0) + group_case_labels_stmt (swtch); + switch_statements.safe_push (swtch); + } } for (unsigned i = 0; i < switch_statements.length (); i++) |