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| author | Steven Bosscher <steven@gcc.gnu.org> | 2006-09-10 20:08:58 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2006-09-10 20:08:58 +0000 |
| commit | 4fe337f67a76d1b8288a3c63dec86dbaed77da4c (patch) | |
| tree | 2a5c9f6b9fe4b4a6d75c7244076cbbdc460f588c /gcc | |
| parent | 9226543b679c84014627a7bdec0503061b3af43d (diff) | |
| download | gcc-4fe337f67a76d1b8288a3c63dec86dbaed77da4c.zip gcc-4fe337f67a76d1b8288a3c63dec86dbaed77da4c.tar.gz gcc-4fe337f67a76d1b8288a3c63dec86dbaed77da4c.tar.bz2 | |
re PR middle-end/26983 (Missing label with builtin_setjmp/longjmp)
PR middle-end/26983
gcc/
* builtins.c (expand_builtin_setjmp): Force next_lab to be
preserved.
testsuite/
* gcc.dg/pr26983.c: New test.
From-SVN: r116826
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/builtins.c | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr26983.c | 19 |
4 files changed, 36 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a389b50..c4066f3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2006-09-10 Steven Bosscher <steven@gcc.gnu.org> + + PR middle-end/26983 + * builtins.c (expand_builtin_setjmp): Force next_lab to be + preserved. + 2006-09-10 Richard Sandiford <richard@codesourcery.com> PR target/29006 diff --git a/gcc/builtins.c b/gcc/builtins.c index 1f62dca..5bcba14 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -760,6 +760,12 @@ expand_builtin_setjmp (tree arglist, rtx target) emit_label (next_lab); + /* Because setjmp and longjmp are not represented in the CFG, a cfgcleanup + may find that the basic block starting with NEXT_LAB is unreachable. + The whole block, along with NEXT_LAB, would be removed (see PR26983). + Make sure that never happens. */ + LABEL_PRESERVE_P (next_lab) = 1; + expand_builtin_setjmp_receiver (next_lab); /* Set TARGET to one. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ce2c223..55eee6b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2006-09-10 Steven Bosscher <steven@gcc.gnu.org> + + PR middle-end/26983 + * gcc.dg/pr26983.c: New test. + 2006-09-10 Richard Sandiford <richard@codesourcery.com> PR target/29006 diff --git a/gcc/testsuite/gcc.dg/pr26983.c b/gcc/testsuite/gcc.dg/pr26983.c new file mode 100644 index 0000000..5e2120a --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr26983.c @@ -0,0 +1,19 @@ +/* { dg-do link } */ + +/* This used to cause a linker failure because GCC would output + assembler code referencing labels that it had not output. */ + +void *jmpbuf[6]; + +void +foo (void) +{ + __builtin_setjmp (jmpbuf); +} + +int +main (void) +{ + return 0; +} + |