diff options
Diffstat (limited to 'patches/gcc/3.4.6/601-gcc34-arm-ldm-peephole2.patch')
| -rw-r--r-- | patches/gcc/3.4.6/601-gcc34-arm-ldm-peephole2.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/patches/gcc/3.4.6/601-gcc34-arm-ldm-peephole2.patch b/patches/gcc/3.4.6/601-gcc34-arm-ldm-peephole2.patch new file mode 100644 index 0000000..395c516 --- /dev/null +++ b/patches/gcc/3.4.6/601-gcc34-arm-ldm-peephole2.patch @@ -0,0 +1,32 @@ +diff -durN gcc-3.4.6.orig/gcc/config/arm/arm.c gcc-3.4.6/gcc/config/arm/arm.c +--- gcc-3.4.6.orig/gcc/config/arm/arm.c 2007-08-15 22:57:51.000000000 +0200 ++++ gcc-3.4.6/gcc/config/arm/arm.c 2007-08-15 22:57:51.000000000 +0200 +@@ -4572,6 +4572,10 @@ + int + adjacent_mem_locations (rtx a, rtx b) + { ++ /* We don't guarantee to preserve the order of these memory refs. */ ++ if (volatile_refs_p (a) || volatile_refs_p (b)) ++ return 0; ++ + if ((GET_CODE (XEXP (a, 0)) == REG + || (GET_CODE (XEXP (a, 0)) == PLUS + && GET_CODE (XEXP (XEXP (a, 0), 1)) == CONST_INT)) +@@ -4611,6 +4615,17 @@ + return 0; + + val_diff = val1 - val0; ++ ++ if (arm_ld_sched) ++ { ++ /* If the target has load delay slots, then there's no benefit ++ to using an ldm instruction unless the offset is zero and ++ we are optimizing for size. */ ++ return (optimize_size && (REGNO (reg0) == REGNO (reg1)) ++ && (val0 == 0 || val1 == 0 || val0 == 4 || val1 == 4) ++ && (val_diff == 4 || val_diff == -4)); ++ } ++ + return ((REGNO (reg0) == REGNO (reg1)) + && (val_diff == 4 || val_diff == -4)); + } |