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| author | Roger Sayle <roger@eyesopen.com> | 2003-03-23 21:25:13 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2003-03-23 21:25:13 +0000 |
| commit | 766dec0ecdb5e4d705c8be49a7b0e826c4356cbf (patch) | |
| tree | 9759e639cd287e6895534bee594b69640a3b17b7 /gcc | |
| parent | ef3e98869075132505d8e1e1c9deaa5fee42e0eb (diff) | |
| download | gcc-766dec0ecdb5e4d705c8be49a7b0e826c4356cbf.zip gcc-766dec0ecdb5e4d705c8be49a7b0e826c4356cbf.tar.gz gcc-766dec0ecdb5e4d705c8be49a7b0e826c4356cbf.tar.bz2 | |
re PR c/10178 (ICE in tree_low_cst)
PR c/10178
* stmt.c (expand_end_case_type): Check for overflow in range when
determining whether to use a bit-test implementation.
* gcc.c-torture/compile/20030323-1.c: New test case.
From-SVN: r64757
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/stmt.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/20030323-1.c | 17 |
4 files changed, 28 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f98fa02..9dc6621 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-03-23 Roger Sayle <roger@eyesopen.com> + + PR c/10178 + * stmt.c (expand_end_case_type): Check for overflow in range when + determining whether to use a bit-test implementation. + 2003-03-23 Richard Henderson <rth@redhat.com> * cfgcleanup.c (try_optimize_cfg): Allow merging of tablejumps @@ -5505,6 +5505,7 @@ expand_end_case_type (orig_index, orig_type) else if (CASE_USE_BIT_TESTS && ! TREE_CONSTANT (index_expr) && compare_tree_int (range, GET_MODE_BITSIZE (word_mode)) < 0 + && compare_tree_int (range, 0) > 0 && lshift_cheap_p () && ((uniq == 1 && count >= 3) || (uniq == 2 && count >= 5) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 34b0946..05b170c 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2003-03-23 Roger Sayle <roger@eyesopen.com> + + * gcc.c-torture/compile/20030323-1.c: New test case. + 2003-03-22 Ulrich Weigand <uweigand@de.ibm.com> * gcc.dg/20030321-1.c: New test. diff --git a/gcc/testsuite/gcc.c-torture/compile/20030323-1.c b/gcc/testsuite/gcc.c-torture/compile/20030323-1.c new file mode 100644 index 0000000..8ea602d --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20030323-1.c @@ -0,0 +1,17 @@ +/* PR c/10178. The following code would ICE because we didn't check for + overflow when computing the range of the switch-statment, and therefore + decided it could be implemented using bit-tests. */ + +int +banana(long citron) +{ + switch (citron) { + case 0x80000000: + case 0x40000: + case 0x40001: + return 1; + break; + } + return 0; +} + |