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| author | Richard Biener <rguenther@suse.de> | 2018-11-28 13:04:27 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-11-28 13:04:27 +0000 |
| commit | a257ad466894df673adc46865d763ee4324d9e17 (patch) | |
| tree | bb9217b9fbab81210da2036428065e73b22e1fa1 /gcc | |
| parent | 20f65b5607d4cf5b4b61e8d1923bb922abadf1ba (diff) | |
| download | gcc-a257ad466894df673adc46865d763ee4324d9e17.zip gcc-a257ad466894df673adc46865d763ee4324d9e17.tar.gz gcc-a257ad466894df673adc46865d763ee4324d9e17.tar.bz2 | |
re PR tree-optimization/88217 (Compile time and memory hog w/ -O2 -fstrict-enums -fno-tree-forwprop -fno-tree-fre)
2018-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/88217
* vr-values.c (vr_values::extract_range_from_phi_node): Make
sure to handle results > +INF and < -INF correctly when
trying to drop down to +INF - 1 or -INF + 1.
* g++.dg/pr88217.C: New testcase.
From-SVN: r266557
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/pr88217.C | 18 | ||||
| -rw-r--r-- | gcc/vr-values.c | 6 |
4 files changed, 34 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 33739ad..2c5bfff 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2018-11-28 Richard Biener <rguenther@suse.de> + + PR tree-optimization/88217 + * vr-values.c (vr_values::extract_range_from_phi_node): Make + sure to handle results > +INF and < -INF correctly when + trying to drop down to +INF - 1 or -INF + 1. + 2018-11-28 Alan Modra <amodra@gmail.com> * xcoffout.c (do_block): Signed/unsigned warning fix. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 4c9a77e..9f2383a 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,10 @@ 2018-11-28 Richard Biener <rguenther@suse.de> + PR tree-optimization/88217 + * g++.dg/pr88217.C: New testcase. + +2018-11-28 Richard Biener <rguenther@suse.de> + PR tree-optimization/79351 * gcc.dg/torture/pr79351.c: New testcase. diff --git a/gcc/testsuite/g++.dg/pr88217.C b/gcc/testsuite/g++.dg/pr88217.C new file mode 100644 index 0000000..b0506ac --- /dev/null +++ b/gcc/testsuite/g++.dg/pr88217.C @@ -0,0 +1,18 @@ +// { dg-do compile { target c++11 } } +// { dg-options "-O2 -fstrict-enums -fno-tree-forwprop -fno-tree-fre" } + +extern "C" int printf (const char *, ...); + +enum E { e1, e2, e3, X }; +E operator*(E e) { return e; } +E begin(E e) { return e; } +E end(E e) { return X; } +E operator++(E& e) { return e = E(e+1); } + +int main() +{ + for (auto e: e1) + { + printf ("%d ", e); + } +} diff --git a/gcc/vr-values.c b/gcc/vr-values.c index 41862b9..a0027c0 100644 --- a/gcc/vr-values.c +++ b/gcc/vr-values.c @@ -2857,7 +2857,8 @@ vr_values::extract_range_from_phi_node (gphi *phi, value_range *vr_result) if (cmp_min < 0) new_min = lhs_vr->min (); else if (cmp_min > 0 - && !vrp_val_is_min (vr_result->min ())) + && tree_int_cst_lt (vrp_val_min (vr_result->type ()), + vr_result->min ())) new_min = int_const_binop (PLUS_EXPR, vrp_val_min (vr_result->type ()), build_int_cst (vr_result->type (), 1)); @@ -2866,7 +2867,8 @@ vr_values::extract_range_from_phi_node (gphi *phi, value_range *vr_result) if (cmp_max > 0) new_max = lhs_vr->max (); else if (cmp_max < 0 - && !vrp_val_is_max (vr_result->max ())) + && tree_int_cst_lt (vr_result->max (), + vrp_val_max (vr_result->type ()))) new_max = int_const_binop (MINUS_EXPR, vrp_val_max (vr_result->type ()), build_int_cst (vr_result->type (), 1)); |