diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/expr.c | 36 |
2 files changed, 42 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 53e4b67af47..b1eea532f46 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-06-29 Kazu Hirata <kazu@cs.umass.edu> + + * expr.c (emit_single_push_insn): If padding is needed + downward, adjust the stack pointer first, and then store the + data into the stack location using an offset. + 2003-06-29 Andreas Jaeger <aj@suse.de> * collect2.h: Convert prototypes to ISO C90. diff --git a/gcc/expr.c b/gcc/expr.c index 849e778b0cb..31c3fa4a205 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -3802,12 +3802,48 @@ emit_single_push_insn (mode, x, type) } if (GET_MODE_SIZE (mode) == rounded_size) dest_addr = gen_rtx_fmt_e (STACK_PUSH_CODE, Pmode, stack_pointer_rtx); + /* If we are to pad downward, adjust the stack pointer first and + then store X into the stack location using an offset. This is + because emit_move_insn does not know how to pad; it does not have + access to type. */ + else if (FUNCTION_ARG_PADDING (mode, type) == downward) + { + unsigned padding_size = rounded_size - GET_MODE_SIZE (mode); + HOST_WIDE_INT offset; + + emit_move_insn (stack_pointer_rtx, + expand_binop (Pmode, +#ifdef STACK_GROWS_DOWNWARD + sub_optab, +#else + add_optab, +#endif + stack_pointer_rtx, + GEN_INT (rounded_size), + NULL_RTX, 0, OPTAB_LIB_WIDEN)); + + offset = (HOST_WIDE_INT) padding_size; +#ifdef STACK_GROWS_DOWNWARD + if (STACK_PUSH_CODE == POST_DEC) + /* We have already decremented the stack pointer, so get the + previous value. */ + offset += (HOST_WIDE_INT) rounded_size; +#else + if (STACK_PUSH_CODE == POST_INC) + /* We have already incremented the stack pointer, so get the + previous value. */ + offset -= (HOST_WIDE_INT) rounded_size; +#endif + dest_addr = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); + } else { #ifdef STACK_GROWS_DOWNWARD + /* ??? This seems wrong if STACK_PUSH_CODE == POST_DEC. */ dest_addr = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (-(HOST_WIDE_INT) rounded_size)); #else + /* ??? This seems wrong if STACK_PUSH_CODE == POST_INC. */ dest_addr = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (rounded_size)); #endif |