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| author | Richard Biener <rguenther@suse.de> | 2018-11-20 12:18:58 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-11-20 12:18:58 +0000 |
| commit | c1d21cd17bce162e7afac5a1849d193952221ce8 (patch) | |
| tree | 863cd0e7dcc110deef48aa27676d296ec8b95768 /gcc | |
| parent | b613740815fa921b1210f87aed3d01a00a59e8bf (diff) | |
| download | gcc-c1d21cd17bce162e7afac5a1849d193952221ce8.zip gcc-c1d21cd17bce162e7afac5a1849d193952221ce8.tar.gz gcc-c1d21cd17bce162e7afac5a1849d193952221ce8.tar.bz2 | |
re PR tree-optimization/88074 (g++ hangs on math expression)
2018-11-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/88074
* tree-ssa-dom.c (pass_dominator::execute): Do not walk
backedges.
* gcc.dg/pr88074.c: New testcase.
From-SVN: r266313
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/gomp/pr88105.c | 30 | ||||
| -rw-r--r-- | gcc/tree-ssa-dom.c | 3 |
4 files changed, 43 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9cf7bb1..45c7b75 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2018-11-20 Richard Biener <rguenther@suse.de> + PR tree-optimization/88074 + * tree-ssa-dom.c (pass_dominator::execute): Do not walk + backedges. + +2018-11-20 Richard Biener <rguenther@suse.de> + PR tree-optimization/88069 * tree-ssa-sccvn.c (visit_phi): Do not value-number to unvisited virtual PHI arguments. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 00475b8..32c0f3d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2018-11-20 Richard Biener <rguenther@suse.de> + + PR tree-optimization/88074 + * gcc.dg/pr88074.c: New testcase. + 2018-11-20 Martin Liska <mliska@suse.cz> * pr57362.C: Move to g++.target/i386 folder. diff --git a/gcc/testsuite/gcc.dg/gomp/pr88105.c b/gcc/testsuite/gcc.dg/gomp/pr88105.c new file mode 100644 index 0000000..9680fdd --- /dev/null +++ b/gcc/testsuite/gcc.dg/gomp/pr88105.c @@ -0,0 +1,30 @@ +/* { dg-do compile } */ +/* { dg-options "-fopenmp -O -fexceptions -fnon-call-exceptions -fno-tree-fre" } */ + +int +s0 (void) +{ + int g6, oh = 0; + int *a6 = &g6; + + (void) a6; + +#pragma omp parallel for + for (g6 = 0; g6 < 1; ++g6) + { + int zk; + + for (zk = 0; zk < 1; ++zk) + { + oh += zk / (zk + 1); + + for (;;) + { + } + } + + a6 = &zk; + } + + return oh; +} diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index c50618d..7787da8 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -777,7 +777,8 @@ pass_dominator::execute (function *fun) if (bb == NULL) continue; while (single_succ_p (bb) - && (single_succ_edge (bb)->flags & EDGE_EH) == 0) + && (single_succ_edge (bb)->flags + & (EDGE_EH|EDGE_DFS_BACK)) == 0) bb = single_succ (bb); if (bb == EXIT_BLOCK_PTR_FOR_FN (fun)) continue; |