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| author | Eric Botcazou <ebotcazou@adacore.com> | 2012-09-14 13:28:44 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2012-09-14 13:28:44 +0000 |
| commit | 5ef0b50ddc04471eda920a9207ab6b62188311f8 (patch) | |
| tree | 5c32661073d991fc5ce315762062115ab0af337c /gcc/expr.h | |
| parent | fcf8632eede077dd7ca327768af56e28f2d3fdca (diff) | |
| download | gcc-5ef0b50ddc04471eda920a9207ab6b62188311f8.zip gcc-5ef0b50ddc04471eda920a9207ab6b62188311f8.tar.gz gcc-5ef0b50ddc04471eda920a9207ab6b62188311f8.tar.bz2 | |
re PR rtl-optimization/44194 (struct returned by value generates useless stores)
PR rtl-optimization/44194
* calls.c (expand_call): In the PARALLEL case, copy the return value
into pseudos instead of spilling it onto the stack.
* emit-rtl.c (adjust_address_1): Rename ADJUST into ADJUST_ADDRESS and
add new ADJUST_OBJECT parameter.
If ADJUST_OBJECT is set, drop the underlying object if it cannot be
proved that the adjusted memory access is still within its bounds.
(adjust_automodify_address_1): Adjust call to adjust_address_1.
(widen_memory_access): Likewise.
* expmed.c (store_bit_field_1): Call adjust_bitfield_address instead
of adjust_address. Do not drop the underlying object of a MEM.
(store_fixed_bit_field): Likewise.
(extract_bit_field_1): Likewise. Fix oversight in recursion.
(extract_fixed_bit_field): Likewise.
* expr.h (adjust_address_1): Adjust prototype.
(adjust_address): Adjust call to adjust_address_1.
(adjust_address_nv): Likewise.
(adjust_bitfield_address): New macro.
(adjust_bitfield_address_nv): Likewise.
* expr.c (expand_assignment): Handle a PARALLEL in more cases.
(store_expr): Likewise.
(store_field): Likewise.
* dse.c: Fix typos in the head comment.
From-SVN: r191302
Diffstat (limited to 'gcc/expr.h')
| -rw-r--r-- | gcc/expr.h | 18 |
1 files changed, 15 insertions, 3 deletions
@@ -557,11 +557,22 @@ extern rtx change_address (rtx, enum machine_mode, rtx); /* Return a memory reference like MEMREF, but with its mode changed to MODE and its address offset by OFFSET bytes. */ #define adjust_address(MEMREF, MODE, OFFSET) \ - adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1) + adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 0) /* Likewise, but the reference is not required to be valid. */ #define adjust_address_nv(MEMREF, MODE, OFFSET) \ - adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1) + adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 0) + +/* Return a memory reference like MEMREF, but with its mode changed + to MODE and its address offset by OFFSET bytes. Assume that it's + for a bitfield and conservatively drop the underlying object if we + cannot be sure to stay within its bounds. */ +#define adjust_bitfield_address(MEMREF, MODE, OFFSET) \ + adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 1) + +/* Likewise, but the reference is not required to be valid. */ +#define adjust_bitfield_address_nv(MEMREF, MODE, OFFSET) \ + adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 1) /* Return a memory reference like MEMREF, but with its mode changed to MODE and its address changed to ADDR, which is assumed to be @@ -573,7 +584,8 @@ extern rtx change_address (rtx, enum machine_mode, rtx); #define adjust_automodify_address_nv(MEMREF, MODE, ADDR, OFFSET) \ adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 0) -extern rtx adjust_address_1 (rtx, enum machine_mode, HOST_WIDE_INT, int, int); +extern rtx adjust_address_1 (rtx, enum machine_mode, HOST_WIDE_INT, int, int, + int); extern rtx adjust_automodify_address_1 (rtx, enum machine_mode, rtx, HOST_WIDE_INT, int); |