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| author | Richard Kenner <kenner@gcc.gnu.org> | 1993-12-20 19:16:01 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1993-12-20 19:16:01 -0500 |
| commit | 674d5d8bef3bbec5b9f2d75aa22402b48ceb1b28 (patch) | |
| tree | ba82c1a724cae651ccea001ddc0954e44639238a /gcc | |
| parent | 405c5495313248c057a9d6df722134f49672a086 (diff) | |
| download | gcc-674d5d8bef3bbec5b9f2d75aa22402b48ceb1b28.zip gcc-674d5d8bef3bbec5b9f2d75aa22402b48ceb1b28.tar.gz gcc-674d5d8bef3bbec5b9f2d75aa22402b48ceb1b28.tar.bz2 | |
(gen_lowpart_common): Return a new hard reg even if not valid in MODE
if the input REG is not valid in its mode.
From-SVN: r6249
Diffstat (limited to 'gcc')
| -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 3fba616..1270521 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. */ |