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| author | Richard Guenther <rguenther@suse.de> | 2007-04-18 11:45:09 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2007-04-18 11:45:09 +0000 |
| commit | 3b48ccbc89aef4e24f5f46e4f90cc793ed43df29 (patch) | |
| tree | 23793781d436a1c62b25d540d256d241df35a7e0 /gcc/testsuite/gcc.dg/tree-ssa/pr21463.c | |
| parent | 383862e8129603b9e8a65bb3d5c5b20e75026495 (diff) | |
| download | gcc-3b48ccbc89aef4e24f5f46e4f90cc793ed43df29.zip gcc-3b48ccbc89aef4e24f5f46e4f90cc793ed43df29.tar.gz gcc-3b48ccbc89aef4e24f5f46e4f90cc793ed43df29.tar.bz2 | |
re PR tree-optimization/19431 (missed optimization with ifs and deferencing)
2007-04-18 Richard Guenther <rguenther@suse.de>
PR tree-optimization/19431
PR tree-optimization/21463
* tree-pass.h (pass_phiprop): Declare.
* passes.c (init_optimization_passes): New phiprop pass.
* tree-ssa-forwprop.c (struct phiprop_d): New structure.
(phivn_valid_p): New helper function.
(phiprop_insert_phi): Likewise.
(propagate_with_phi): Likewise.
(tree_ssa_phiprop): New propagator propagating loads
through phi nodes if profitable.
* gcc.c-torture/execute/20070212-1.c: New testcase.
* gcc.c-torture/execute/20070212-2.c: Likewise.
* gcc.c-torture/execute/20070212-3.c: Likewise.
* gcc.dg/tree-ssa/pr19431.c: Likewise.
* gcc.dg/tree-ssa/pr21463.c: Likewise.
* g++.dg/tree-ssa/pr21463.C: Likewise.
* g++.dg/tree-ssa/pr30738.C: Likewise.
From-SVN: r123946
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr21463.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr21463.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21463.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21463.c new file mode 100644 index 0000000..f490bf6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21463.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-phiprop" } */ + +struct f +{ + int i; +}; + +int g(int i, int c, struct f *ff, int g) +{ + int *t; + if (c) + t = &i; + else + t = &ff->i; + return *t; +} + +/* { dg-final { scan-tree-dump-not "\\*t" "phiprop" } } */ +/* { dg-final { cleanup-tree-dump "phiprop" } } */ |