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| author | Bin Cheng <bin.cheng@arm.com> | 2012-05-04 02:52:27 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2012-05-04 02:52:27 +0000 |
| commit | 73292fcf29ebad0ff753d0d57d7bef3677187b0e (patch) | |
| tree | b353a2df6244bb00d33f5acdd7a5bbea679cfe7f /gcc/reload1.c | |
| parent | 244541410209602edc266168fdb1adba099eee88 (diff) | |
| download | gcc-73292fcf29ebad0ff753d0d57d7bef3677187b0e.tar.gz | |
re PR rtl-optimization/52804 (IRA/RELOAD allocate wrong register on ARM for cortex-m0)
PR rtl-optimization/52804
* reload1.c (reload_reg_reaches_end_p): Check whether successor
reload with type RELOAD_FOR_INPUT_ADDRESS kills reload register
of current one with type RELOAD_FOR_INPADDR_ADDRESS.
Same stands for reloads with type RELOAD_FOR_OUTPUT_ADDRESS and
RELOAD_FOR_OUTADDR_ADDRESS.
From-SVN: r187139
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 71cea8171d4..359a89313f0 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -5429,6 +5429,13 @@ reload_reg_reaches_end_p (unsigned int regno, int reloadnum) if (TEST_HARD_REG_BIT (reload_reg_used_in_input[i], regno)) return 0; + /* Reload register of reload with type RELOAD_FOR_INPADDR_ADDRESS + could be killed if the register is also used by reload with type + RELOAD_FOR_INPUT_ADDRESS, so check it. */ + if (type == RELOAD_FOR_INPADDR_ADDRESS + && TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[opnum], regno)) + return 0; + for (i = opnum + 1; i < reload_n_operands; i++) if (TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[i], regno) || TEST_HARD_REG_BIT (reload_reg_used_in_inpaddr_addr[i], regno)) @@ -5503,6 +5510,13 @@ reload_reg_reaches_end_p (unsigned int regno, int reloadnum) || TEST_HARD_REG_BIT (reload_reg_used_in_outaddr_addr[i], regno)) return 0; + /* Reload register of reload with type RELOAD_FOR_OUTADDR_ADDRESS + could be killed if the register is also used by reload with type + RELOAD_FOR_OUTPUT_ADDRESS, so check it. */ + if (type == RELOAD_FOR_OUTADDR_ADDRESS + && TEST_HARD_REG_BIT (reload_reg_used_in_outaddr_addr[opnum], regno)) + return 0; + return 1; default: |