diff options
Diffstat (limited to 'gcc/config/arm/arm.md')
| -rw-r--r-- | gcc/config/arm/arm.md | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 9474c0d..e94ceb8 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -4192,6 +4192,30 @@ " ) +; If optimizing for size, or if we have load delay slots, then +; we want to split the constant into two separate operations. +; In both cases this may split a trivial part into a single data op +; leaving a single complex constant to load. We can also get longer +; offsets in a LDR which means we get better chances of sharing the pool +; entries. Finally, we can normally do a better job of scheduling +; LDR instructions than we can with LDM. +; This pattern will only match if the one above did not. +(define_split + [(set (match_operand:ANY64 0 "arm_general_register_operand" "") + (match_operand:ANY64 1 "const_double_operand" ""))] + "TARGET_ARM && reload_completed + && arm_const_double_by_parts (operands[1])" + [(set (match_dup 0) (match_dup 1)) + (set (match_dup 2) (match_dup 3))] + " + operands[2] = gen_highpart (SImode, operands[0]); + operands[3] = gen_highpart_mode (SImode, GET_MODE (operands[0]), + operands[1]); + operands[0] = gen_lowpart (SImode, operands[0]); + operands[1] = gen_lowpart (SImode, operands[1]); + " +) + (define_split [(set (match_operand:ANY64 0 "arm_general_register_operand" "") (match_operand:ANY64 1 "arm_general_register_operand" ""))] |