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| author | James Greenhalgh <james.greenhalgh@arm.com> | 2014-05-16 09:25:48 +0000 |
|---|---|---|
| committer | James Greenhalgh <jgreenhalgh@gcc.gnu.org> | 2014-05-16 09:25:48 +0000 |
| commit | 909734beb71dbf888dfda464541f5acd614e5d25 (patch) | |
| tree | a472934fbcd212001e9f77a0d2679e80b05ccce2 /gcc/config/aarch64 | |
| parent | fb620c4a9a2120478ce4d6c9fc09826d39c89529 (diff) | |
| download | gcc-909734beb71dbf888dfda464541f5acd614e5d25.zip gcc-909734beb71dbf888dfda464541f5acd614e5d25.tar.gz gcc-909734beb71dbf888dfda464541f5acd614e5d25.tar.bz2 | |
[AArch64 costs 17/18] Cost for SYMBOL_REF, HIGH and LO_SUM
gcc/
* config/aarch64/aarch64.c (aarch64_rtx_costs): Cost SYMBOL_REF,
HIGH, LO_SUM.
From-SVN: r210509
Diffstat (limited to 'gcc/config/aarch64')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 58627b5..9eff2fd 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5508,15 +5508,44 @@ cost_plus: return false; /* All arguments need to be in registers. */ } - case HIGH: - if (!CONSTANT_P (XEXP (x, 0))) - *cost += rtx_cost (XEXP (x, 0), HIGH, 0, speed); + case SYMBOL_REF: + + if (aarch64_cmodel == AARCH64_CMODEL_LARGE) + { + /* LDR. */ + if (speed) + *cost += extra_cost->ldst.load; + } + else if (aarch64_cmodel == AARCH64_CMODEL_SMALL + || aarch64_cmodel == AARCH64_CMODEL_SMALL_PIC) + { + /* ADRP, followed by ADD. */ + *cost += COSTS_N_INSNS (1); + if (speed) + *cost += 2 * extra_cost->alu.arith; + } + else if (aarch64_cmodel == AARCH64_CMODEL_TINY + || aarch64_cmodel == AARCH64_CMODEL_TINY_PIC) + { + /* ADR. */ + if (speed) + *cost += extra_cost->alu.arith; + } + + if (flag_pic) + { + /* One extra load instruction, after accessing the GOT. */ + *cost += COSTS_N_INSNS (1); + if (speed) + *cost += extra_cost->ldst.load; + } return true; + case HIGH: case LO_SUM: - if (!CONSTANT_P (XEXP (x, 1))) - *cost += rtx_cost (XEXP (x, 1), LO_SUM, 1, speed); - *cost += rtx_cost (XEXP (x, 0), LO_SUM, 0, speed); + /* ADRP/ADD (immediate). */ + if (speed) + *cost += extra_cost->alu.arith; return true; case ZERO_EXTRACT: |