diff options
| author | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-12-21 00:16:01 +0000 |
|---|---|---|
| committer | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-12-21 00:16:01 +0000 |
| commit | c84a933ed3bd3ac4bd358852b0aa26d1ef192cb4 (patch) | |
| tree | ba82c1a724cae651ccea001ddc0954e44639238a /gcc/emit-rtl.c | |
| parent | 43e3c91f2006d648341cb8d5a5718346f0052222 (diff) | |
| download | gcc-c84a933ed3bd3ac4bd358852b0aa26d1ef192cb4.tar.gz | |
(gen_lowpart_common): Return a new hard reg even if not valid in MODE
if the input REG is not valid in its mode.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@6249 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 3fba61625b1..127052178aa 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -595,9 +595,14 @@ gen_lowpart_common (mode, x) else if (GET_CODE (x) == REG) { /* If the register is not valid for MODE, return 0. If we don't - do this, there is no way to fix up the resulting REG later. */ + do this, there is no way to fix up the resulting REG later. + But we do do this if the current REG is not valid for its + mode. This latter is a kludge, but is required due to the + way that parameters are passed on some machines, most + notably Sparc. */ if (REGNO (x) < FIRST_PSEUDO_REGISTER - && ! HARD_REGNO_MODE_OK (REGNO (x) + word, mode)) + && ! HARD_REGNO_MODE_OK (REGNO (x) + word, mode) + && HARD_REGNO_MODE_OK (REGNO (x), GET_MODE (x))) return 0; else if (REGNO (x) < FIRST_PSEUDO_REGISTER /* integrate.c can't handle parts of a return value register. */ |