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| author | Jie Zhang <jie@codesourcery.com> | 2011-02-05 12:06:18 +0000 |
|---|---|---|
| committer | Jie Zhang <jiez@gcc.gnu.org> | 2011-02-05 12:06:18 +0000 |
| commit | beea27550eb8be53affa33bdd8a32714b7166c60 (patch) | |
| tree | a89f09befdf6264a67eab321cdb66ca533fd5129 /gcc | |
| parent | 991fcb7a01b62d7e35ec2175aa0438585c74acab (diff) | |
| download | gcc-beea27550eb8be53affa33bdd8a32714b7166c60.zip gcc-beea27550eb8be53affa33bdd8a32714b7166c60.tar.gz gcc-beea27550eb8be53affa33bdd8a32714b7166c60.tar.bz2 | |
re PR rtl-optimization/42631 ("-fcompare-debug failure" with "-O1 -funroll-loops")
PR debug/42631
* web.c (entry_register): Don't clobber the number of the
first uninitialized reference in used[].
testsuite/
PR debug/42631
* gcc.dg/pr42631.c: Update test.
* gcc.dg/pr42631-2.c: New test.
From-SVN: r169851
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr42631-2.c | 9 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr42631.c | 5 | ||||
| -rw-r--r-- | gcc/web.c | 6 |
5 files changed, 30 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 39baf06..de08bab 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2011-02-05 Jie Zhang <jie@codesourcery.com> + + PR debug/42631 + * web.c (entry_register): Don't clobber the number of the + first uninitialized reference in used[]. + 2011-02-04 Sebastian Pop <sebastian.pop@amd.com> PR tree-optimization/46194 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 066e019..89053c2 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2011-02-05 Jie Zhang <jie@codesourcery.com> + + PR debug/42631 + * gcc.dg/pr42631.c: Update test. + * gcc.dg/pr42631-2.c: New test. + 2001-02-05 Thomas Koenig <tkoenig@gcc.gnu.org> PR fortran/47574 diff --git a/gcc/testsuite/gcc.dg/pr42631-2.c b/gcc/testsuite/gcc.dg/pr42631-2.c new file mode 100644 index 0000000..a5da2de --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr42631-2.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -funroll-loops -fdump-rtl-web" } */ + +foo() +{ +} + +/* { dg-final { scan-rtl-dump-not "Web oldreg" "web" } } */ +/* { dg-final { cleanup-rtl-dump "web" } } */ diff --git a/gcc/testsuite/gcc.dg/pr42631.c b/gcc/testsuite/gcc.dg/pr42631.c index f5ac5a5..3d6c229 100644 --- a/gcc/testsuite/gcc.dg/pr42631.c +++ b/gcc/testsuite/gcc.dg/pr42631.c @@ -14,10 +14,13 @@ combine uninitialized uses into a single web. */ /* { dg-do compile } */ -/* { dg-options "-g -O1 -funroll-loops -fcompare-debug" } */ +/* { dg-options "-g -O1 -funroll-loops -fcompare-debug -fdump-rtl-web" } */ void foo() { unsigned k; while (--k > 0); } + +/* { dg-final { scan-rtl-dump-not "Web oldreg" "web" } } */ +/* { dg-final { cleanup-rtl-dump "web" } } */ @@ -260,7 +260,11 @@ entry_register (struct web_entry *entry, df_ref ref, unsigned int *used) and there won't be any use for the other values when we get to this point. */ if (used[REGNO (reg)] != 1) - newreg = reg, used[REGNO (reg)] = 1; + { + newreg = reg; + if (!used[REGNO (reg)]) + used[REGNO (reg)] = 1; + } else { newreg = gen_reg_rtx (GET_MODE (reg)); |