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| author | ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-07 11:44:04 +0000 |
|---|---|---|
| committer | ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-07 11:44:04 +0000 |
| commit | ce071c3cdd9db5272dd1343957403e7963ff9d94 (patch) | |
| tree | 0ea72cf5820d538b1090730f6873e404c61aa46a /gcc/config/aarch64 | |
| parent | f5faab844106d746903455717a480387ae1f0083 (diff) | |
| download | gcc-ce071c3cdd9db5272dd1343957403e7963ff9d94.tar.gz | |
* config/aarch64/aarch64.c (aarch64_legitimize_reload_address):
Explain why plus_constant is not used.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204507 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/aarch64')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 30c8eb00805..8458cac34f2 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -4033,7 +4033,11 @@ aarch64_legitimize_reload_address (rtx *x_p, cst = force_const_mem (xmode, cst); /* Reload high part into base reg, leaving the low part - in the mem instruction. */ + in the mem instruction. + Note that replacing this gen_rtx_PLUS with plus_constant is + wrong in this case because we rely on the + (plus (plus reg c1) c2) structure being preserved so that + XEXP (*p, 0) in push_reload below uses the correct term. */ x = gen_rtx_PLUS (xmode, gen_rtx_PLUS (xmode, XEXP (x, 0), cst), GEN_INT (low)); |