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| author | Adam Nemet <anemet@caviumnetworks.com> | 2006-02-14 07:10:35 +0000 |
|---|---|---|
| committer | Adam Nemet <nemet@gcc.gnu.org> | 2006-02-14 07:10:35 +0000 |
| commit | e963b866133cdc6d1244d61647f4f236715f6a77 (patch) | |
| tree | bc2ef4c9ed0be960f611c4b02d11af7828b26e2e /gcc | |
| parent | 3bf78d3be26e89446da009f5c5e562d8ba1a1179 (diff) | |
| download | gcc-e963b866133cdc6d1244d61647f4f236715f6a77.zip gcc-e963b866133cdc6d1244d61647f4f236715f6a77.tar.gz gcc-e963b866133cdc6d1244d61647f4f236715f6a77.tar.bz2 | |
simplify-rtx.c (simplify_unary_operation_1): Return new expression in the requested machine mode.
* simplify-rtx.c (simplify_unary_operation_1) <TRUNCATE>: Return
new expression in the requested machine mode.
From-SVN: r110959
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 7 |
2 files changed, 9 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6ffd332..ca77775 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2006-02-13 Adam Nemet <anemet@caviumnetworks.com> + + * simplify-rtx.c (simplify_unary_operation_1) <TRUNCATE>: Return + new expression in the requested machine mode. + 2006-02-13 Roger Sayle <roger@eyesopen.com> * optabs.c (expand_abs): Don't call do_jump_by_parts_greater_rtx diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 4cdbad7..c949dea 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -609,12 +609,13 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op) return simplify_gen_unary (GET_CODE (op), mode, XEXP (XEXP (op, 0), 0), mode); - /* (truncate:SI (subreg:DI (truncate:SI X) 0)) is - (truncate:SI x). */ + /* (truncate:A (subreg:B (truncate:C X) 0)) is + (truncate:A X). */ if (GET_CODE (op) == SUBREG && GET_CODE (SUBREG_REG (op)) == TRUNCATE && subreg_lowpart_p (op)) - return SUBREG_REG (op); + return simplify_gen_unary (TRUNCATE, mode, XEXP (SUBREG_REG (op), 0), + GET_MODE (XEXP (SUBREG_REG (op), 0))); /* If we know that the value is already truncated, we can replace the TRUNCATE with a SUBREG if TRULY_NOOP_TRUNCATION |