diff options
| author | Yvan Roux <yvan.roux@linaro.org> | 2015-08-23 22:07:34 +0200 |
|---|---|---|
| committer | Linaro Code Review <review@review.linaro.org> | 2015-08-27 12:22:23 +0000 |
| commit | 1071d7605bba15506104c027b258c3091c59942e (patch) | |
| tree | f42eac55a83972a639c0dfcf21de2ef53cd8abe4 | |
| parent | cb4d3b265722f26fef3993c2e55ec42f269c8b96 (diff) | |
gcc/
Backport from trunk r222800.
2015-05-05 Renlin Li <renlin.li@arm.com>
* config/aarch64/aarch64.md (add<mode>3): Use mov when allowed.
Change-Id: I54ada4f64148700a0cb366fc3d583a1f4b3562ec
| -rw-r--r-- | gcc/config/aarch64/aarch64.md | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index 2901954a8e0..ec2d6d71326 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -1414,18 +1414,28 @@ " if (! aarch64_plus_operand (operands[2], VOIDmode)) { - rtx subtarget = ((optimize && can_create_pseudo_p ()) - ? gen_reg_rtx (<MODE>mode) : operands[0]); HOST_WIDE_INT imm = INTVAL (operands[2]); - if (imm < 0) - imm = -(-imm & ~0xfff); + if (aarch64_move_imm (imm, <MODE>mode) && can_create_pseudo_p ()) + { + rtx tmp = gen_reg_rtx (<MODE>mode); + emit_move_insn (tmp, operands[2]); + operands[2] = tmp; + } else - imm &= ~0xfff; - - emit_insn (gen_add<mode>3 (subtarget, operands[1], GEN_INT (imm))); - operands[1] = subtarget; - operands[2] = GEN_INT (INTVAL (operands[2]) - imm); + { + rtx subtarget = ((optimize && can_create_pseudo_p ()) + ? gen_reg_rtx (<MODE>mode) : operands[0]); + + if (imm < 0) + imm = -(-imm & ~0xfff); + else + imm &= ~0xfff; + + emit_insn (gen_add<mode>3 (subtarget, operands[1], GEN_INT (imm))); + operands[1] = subtarget; + operands[2] = GEN_INT (INTVAL (operands[2]) - imm); + } } " ) |