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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2011-07-07 15:05:42 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2011-07-07 15:05:42 +0000 |
| commit | 3f125532e6f26606080d77738c0a385a20733a39 (patch) | |
| tree | 6f2e7b2cf8b1f451a373dc4079e5fa18afb1c51a /gcc/reload1.c | |
| parent | 30af957b3ff2ab4acc1c72c8e27a28c3a98a1289 (diff) | |
| download | gcc-3f125532e6f26606080d77738c0a385a20733a39.zip gcc-3f125532e6f26606080d77738c0a385a20733a39.tar.gz gcc-3f125532e6f26606080d77738c0a385a20733a39.tar.bz2 | |
reload1.c (choose_reload_regs): Use mode sizes to check whether an old reload register completely defines the...
gcc/
* reload1.c (choose_reload_regs): Use mode sizes to check whether
an old reload register completely defines the required value.
gcc/testsuite/
* gcc.target/arm/neon-modes-3.c: New test.
From-SVN: r175980
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 7f84fc8..499412c 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -6481,6 +6481,8 @@ choose_reload_regs (struct insn_chain *chain) if (regno >= 0 && reg_last_reload_reg[regno] != 0 + && (GET_MODE_SIZE (GET_MODE (reg_last_reload_reg[regno])) + >= GET_MODE_SIZE (mode) + byte) #ifdef CANNOT_CHANGE_MODE_CLASS /* Verify that the register it's in can be used in mode MODE. */ @@ -6492,24 +6494,12 @@ choose_reload_regs (struct insn_chain *chain) { enum reg_class rclass = rld[r].rclass, last_class; rtx last_reg = reg_last_reload_reg[regno]; - enum machine_mode need_mode; i = REGNO (last_reg); i += subreg_regno_offset (i, GET_MODE (last_reg), byte, mode); last_class = REGNO_REG_CLASS (i); - if (byte == 0) - need_mode = mode; - else - need_mode - = smallest_mode_for_size - (GET_MODE_BITSIZE (mode) + byte * BITS_PER_UNIT, - GET_MODE_CLASS (mode) == MODE_PARTIAL_INT - ? MODE_INT : GET_MODE_CLASS (mode)); - - if ((GET_MODE_SIZE (GET_MODE (last_reg)) - >= GET_MODE_SIZE (need_mode)) - && reg_reloaded_contents[i] == regno + if (reg_reloaded_contents[i] == regno && TEST_HARD_REG_BIT (reg_reloaded_valid, i) && HARD_REGNO_MODE_OK (i, rld[r].mode) && (TEST_HARD_REG_BIT (reg_class_contents[(int) rclass], i) |