diff options
author | Rong Xu <xur@google.com> | 2014-07-21 16:47:22 -0700 |
---|---|---|
committer | Rong Xu <xur@google.com> | 2014-07-29 15:31:03 -0700 |
commit | 38a8aecfb882072900434499696b5c32a2274515 (patch) | |
tree | 2aac97f0ae24b03cd98c1a06e989c031c173f889 /gcc-4.9/gcc/lra-eliminations.c | |
parent | c231900e5dcc14d8296bd9f62b45997a49d4d5e7 (diff) | |
download | toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.tar.gz toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.tar.bz2 toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.zip |
[4.9] Switch gcc-4.9 to use google/gcc-4_9 branch.
This source drop uses svn version r212828 of google/gcc-4.9 branch.
We also cherry-picked r213062, r213063 and r213064 to fix windows
build issues.
All gcc-4.9 patches before July 3rd are ported to google/gcc-4.9.
The following prior commits has not been merged to google branch yet.
(They are included in this commit).
e7af147f979e657fe2df00808e5b4319b0e088c6,
baf87df3cb2683649ba7e9872362a7e721117c23, and
c231900e5dcc14d8296bd9f62b45997a49d4d5e7.
Change-Id: I4bea3ea470387ff751c2be4cb0d4a12059b9299b
Diffstat (limited to 'gcc-4.9/gcc/lra-eliminations.c')
-rw-r--r-- | gcc-4.9/gcc/lra-eliminations.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/lra-eliminations.c b/gcc-4.9/gcc/lra-eliminations.c index abdf69733..278782035 100644 --- a/gcc-4.9/gcc/lra-eliminations.c +++ b/gcc-4.9/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)); |