diff options
| author | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-23 01:52:01 +0000 |
|---|---|---|
| committer | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-23 01:52:01 +0000 |
| commit | 10258db7e3bcf3c16127b85d98a9325c2b812b55 (patch) | |
| tree | 9000fcbfabfb89ef31f27a797a7cca7449821d09 /gcc/lra-eliminations.c | |
| parent | c0798a90f7cd470d7db988caabfd98f37b2a527c (diff) | |
| download | gcc-10258db7e3bcf3c16127b85d98a9325c2b812b55.tar.gz | |
2014-05-22 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/61215
* lra-elelimination.c (lra_eliminate_regs_1): Don't use
simplify_gen_subreg until final substitution.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@210838 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/lra-eliminations.c')
| -rw-r--r-- | gcc/lra-eliminations.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/lra-eliminations.c b/gcc/lra-eliminations.c index abdf6973310..27878203555 100644 --- a/gcc/lra-eliminations.c +++ b/gcc/lra-eliminations.c @@ -565,6 +565,16 @@ lra_eliminate_regs_1 (rtx insn, rtx x, enum machine_mode mem_mode, alter_subreg (&x, false); return x; } + else if (! subst_p) + { + /* LRA can transform subregs itself. So don't call + simplify_gen_subreg until LRA transformations are + finished. Function simplify_gen_subreg can do + non-trivial transformations (like truncation) which + might make LRA work to fail. */ + SUBREG_REG (x) = new_rtx; + return x; + } else return simplify_gen_subreg (GET_MODE (x), new_rtx, GET_MODE (new_rtx), SUBREG_BYTE (x)); |