Hi Andre,
> The bitposition calculation for the bitfield lowering in loop if conversion
> was not
> taking DECL_FIELD_OFFSET into account, which meant that it would result in
> wrong bitpositions for bitfields that did not end up having representations
> starting at the beginning of the struct.
>
> Bootstrappend and regression tested on aarch64-none-linux-gnu and
> x86_64-pc-linux-gnu.
I tried this patch together with the one for PR tree-optimization/107226
on sparc-sun-solaris2.11 to check if it cures the bootstrap failure
reported in PR tree-optimization/107232. While this restores bootstrap,
several of the new tests FAIL:
+FAIL: gcc.dg/vect/vect-bitfield-read-1.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-1.c scan-tree-dump-times vect "vectorized
1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-2.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-2.c scan-tree-dump-times vect "vectorized
1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-3.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 2 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-3.c scan-tree-dump-times vect "vectorized
2 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-4.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-4.c scan-tree-dump-times vect "vectorized
1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-read-6.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-1.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-1.c scan-tree-dump-times vect
"vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-2.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-2.c scan-tree-dump-times vect
"vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-3.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-3.c scan-tree-dump-times vect
"vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-5.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorized 1 loops" 1
+FAIL: gcc.dg/vect/vect-bitfield-write-5.c scan-tree-dump-times vect
"vectorized 1 loops" 1
For vect-bitfield-read-1.c, the dump has
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: ==> examining pattern def
statement: patt_31 = patt_30 >> 1;
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: ==> examining statement:
patt_31 = patt_30 >> 1;
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: vect_is_simple_use: operand
_ifc__27 & 4294967294, type of def: internal
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: vect_is_simple_use: vectype
vector(2) unsigned int
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: vect_is_simple_use: operand
1, type of def: constant
gcc.dg/vect/vect-bitfield-read-1.c:25:23: missed: op not supported by target.
gcc.dg/vect/vect-bitfield-read-1.c:23:1: missed: not vectorized: relevant
stmt not supported: patt_31 = patt_30 >> 1;
gcc.dg/vect/vect-bitfield-read-1.c:25:23: missed: bad operation or unsupported
loop bound.
gcc.dg/vect/vect-bitfield-read-1.c:25:23: note: ***** Analysis failed with
vector mode V2SI
Rainer
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
