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| author | Jim Wilson <wilson@gcc.gnu.org> | 1993-04-25 14:20:55 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1993-04-25 14:20:55 -0700 |
| commit | 51f0e748faaeb6f31deb2a8c38dd2b235fbdb137 (patch) | |
| tree | 7ca971280e4aca7caa1e6e1c0730d5d00250bfa1 | |
| parent | 9fe5bce9bbfe44ab8a8873d000f7ba90672bd0a8 (diff) | |
| download | gcc-51f0e748faaeb6f31deb2a8c38dd2b235fbdb137.zip gcc-51f0e748faaeb6f31deb2a8c38dd2b235fbdb137.tar.gz gcc-51f0e748faaeb6f31deb2a8c38dd2b235fbdb137.tar.bz2 | |
(REG_ALLOC_ORDER, REG_LEAF_ALLOC_ORDER): Make %f0/%f1
the last float registers allocated.
From-SVN: r4221
| -rw-r--r-- | gcc/config/sparc/sparc.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h index 1646e78..c2ad0ba 100644 --- a/gcc/config/sparc/sparc.h +++ b/gcc/config/sparc/sparc.h @@ -512,15 +512,21 @@ enum reg_class { NO_REGS, GENERAL_REGS, FP_REGS, ALL_REGS, LIM_REG_CLASSES }; ((REGNO) >= 32 ? FP_REGS : (REGNO) == 0 ? NO_REGS : GENERAL_REGS) /* This is the order in which to allocate registers - normally. */ + normally. + + We put %f0/%f1 last among the float registers, so as to make it more + likely that a pseduo-register which dies in the float return register + will get allocated to the float return register, thus saving a move + instruction at the end of the function. */ #define REG_ALLOC_ORDER \ { 8, 9, 10, 11, 12, 13, 2, 3, \ 15, 16, 17, 18, 19, 20, 21, 22, \ 23, 24, 25, 26, 27, 28, 29, 31, \ - 32, 33, 34, 35, 36, 37, 38, 39, \ + 34, 35, 36, 37, 38, 39, \ 40, 41, 42, 43, 44, 45, 46, 47, \ 48, 49, 50, 51, 52, 53, 54, 55, \ 56, 57, 58, 59, 60, 61, 62, 63, \ + 32, 33, \ 1, 4, 5, 6, 7, 0, 14, 30} /* This is the order in which to allocate registers for @@ -530,10 +536,11 @@ enum reg_class { NO_REGS, GENERAL_REGS, FP_REGS, ALL_REGS, LIM_REG_CLASSES }; { 2, 3, 24, 25, 26, 27, 28, 29, \ 15, 8, 9, 10, 11, 12, 13, \ 16, 17, 18, 19, 20, 21, 22, 23, \ - 32, 33, 34, 35, 36, 37, 38, 39, \ + 34, 35, 36, 37, 38, 39, \ 40, 41, 42, 43, 44, 45, 46, 47, \ 48, 49, 50, 51, 52, 53, 54, 55, \ 56, 57, 58, 59, 60, 61, 62, 63, \ + 32, 33, \ 1, 4, 5, 6, 7, 0, 14, 30, 31} #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc () |