diff options
| author | Ulrich Weigand <uweigand@de.ibm.com> | 2005-12-18 16:06:55 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2005-12-18 16:06:55 +0000 |
| commit | 5a575f77fde8efa894e6eefa20ca7e96881fe0e1 (patch) | |
| tree | 3d046856da977e0859c1d1ed467582650d5b31e1 /gcc | |
| parent | e75ea710dd6d61c9ed5b5200bd3d0f6132aa606a (diff) | |
| download | gcc-5a575f77fde8efa894e6eefa20ca7e96881fe0e1.zip gcc-5a575f77fde8efa894e6eefa20ca7e96881fe0e1.tar.gz gcc-5a575f77fde8efa894e6eefa20ca7e96881fe0e1.tar.bz2 | |
re PR rtl-optimization/21041 (ICE: output_operand: Cannot decompose address)
PR rtl-optimization/21041
* reload.c (find_reloads_subreg_address): Replace paradoxical
subreg of MEM by widened access only if the resulting memory
is properly aligned, even on !STRICT_ALIGNMENT targets.
PR rtl-optimization/21041
* gcc.dg/pr21041.c: New test.
From-SVN: r108760
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/reload.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr21041.c | 42 |
4 files changed, 55 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6e4f1ff..bf05ff9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-12-18 Ulrich Weigand <uweigand@de.ibm.com> + + PR rtl-optimization/21041 + * reload.c (find_reloads_subreg_address): Replace paradoxical + subreg of MEM by widened access only if the resulting memory + is properly aligned, even on !STRICT_ALIGNMENT targets. + 2005-12-18 Andreas Krebbel <krebbel1@de.ibm.com> * tree-cfg.c (tree_flow_call_edges_add): Check for empty basic blocks. diff --git a/gcc/reload.c b/gcc/reload.c index 7066f7d..2b61a8e 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -5911,7 +5911,7 @@ find_reloads_subreg_address (rtx x, int force_replace, int opnum, /* If this was a paradoxical subreg that we replaced, the resulting memory must be sufficiently aligned to allow us to widen the mode of the memory. */ - if (outer_size > inner_size && STRICT_ALIGNMENT) + if (outer_size > inner_size) { rtx base; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 87e1de6..4174961 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2005-12-18 Ulrich Weigand <uweigand@de.ibm.com> + + PR rtl-optimization/21041 + * gcc.dg/pr21041.c: New test. + 2005-12-18 Andreas Krebbel <krebbel1@de.ibm.com> * gcc.dg/20051201-1.c: New test. diff --git a/gcc/testsuite/gcc.dg/pr21041.c b/gcc/testsuite/gcc.dg/pr21041.c new file mode 100644 index 0000000..34ed14d --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr21041.c @@ -0,0 +1,42 @@ + +/* { dg-do compile { target fpic } } */ +/* { dg-options "-O2 -fPIC" } */ + +struct args +{ + short int matrix[8][8]; + char **current; +}; + +int test (struct args *args, char *init, int a, int b) +{ + int i, j, k; + + if (!args || a > b || a < 0) + return -1; + + for (i = 0; i < 2; i++) + { + char *dest = *args->current; + char *p = dest; + + for (j = 0; j < 8; j++) + *p++ = *init++; + + for (k = 0; k < 8; k++) + { + short int *blockvals = &args->matrix[k][0]; + dest[0] += blockvals[0]; + dest[1] += blockvals[1]; + dest[2] += blockvals[2]; + dest[3] += blockvals[3]; + dest[4] += blockvals[4]; + dest[5] += blockvals[5]; + dest[6] += blockvals[6]; + dest[7] += blockvals[7]; + } + } + + return 1; +} + |