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| author | Bernd Schmidt <bernds@redhat.com> | 2002-06-28 15:43:54 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2002-06-28 15:43:54 +0000 |
| commit | 53501a19fa31272638948d247ad7988afa69d3a4 (patch) | |
| tree | b551da7ab87d09377d299d36ba9dc9390c9f471c /gcc/emit-rtl.c | |
| parent | 20c2d1fea3d673ea7ee8e6aedf294130797fde68 (diff) | |
| download | gcc-53501a19fa31272638948d247ad7988afa69d3a4.zip gcc-53501a19fa31272638948d247ad7988afa69d3a4.tar.gz gcc-53501a19fa31272638948d247ad7988afa69d3a4.tar.bz2 | |
Prevent creation of paradoxical FLOAT_MODE subregs
From-SVN: r55064
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 77697ae..956d38d 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -964,6 +964,11 @@ gen_lowpart_common (mode, x) > ((xsize + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD))) return 0; + /* Don't allow generating paradoxical FLOAT_MODE subregs. */ + if (GET_MODE_CLASS (mode) == MODE_FLOAT + && GET_MODE (x) != VOIDmode && msize > xsize) + return 0; + offset = subreg_lowpart_offset (mode, GET_MODE (x)); if ((GET_CODE (x) == ZERO_EXTEND || GET_CODE (x) == SIGN_EXTEND) |