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| author | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-10-21 19:27:19 +0000 |
|---|---|---|
| committer | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-10-21 19:27:19 +0000 |
| commit | edffc66dbb7f83d8b92ea818f5460dad43b62039 (patch) | |
| tree | e74cf64bef6571029f944536af0afa7cd3a4dc62 /gcc/expmed.c | |
| parent | 7b8220fe7d19aab6ad4c274fc80f8acaf4839148 (diff) | |
| download | gcc-edffc66dbb7f83d8b92ea818f5460dad43b62039.tar.gz | |
Fix sparc builtin_memcpy miscompilation.
* expmed.c (store_bit_field): If need to add a SUBREG, then remove
existing SUBREG if we can, otherwise abort.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@23215 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 1c9fcf57829..2836c4cdf6d 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -423,7 +423,18 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, align, total_size) || GET_MODE_SIZE (GET_MODE (op0)) > UNITS_PER_WORD) { if (GET_CODE (op0) != REG) - op0 = copy_to_reg (op0); + { + /* Since this is a destination (lvalue), we can't copy it to a + pseudo. We can trivially remove a SUBREG that does not + change the size of the operand. Such a SUBREG may have been + added above. Otherwise, abort. */ + if (GET_CODE (op0) == SUBREG + && (GET_MODE_SIZE (GET_MODE (op0)) + == GET_MODE_SIZE (GET_MODE (SUBREG_REG (op0))))) + op0 = SUBREG_REG (op0); + else + abort (); + } op0 = gen_rtx_SUBREG (mode_for_size (BITS_PER_WORD, MODE_INT, 0), op0, offset); } |