[Bug c/35634] [4.1/4.2/4.3/4.4 Regression] operand of pre-/postin-/decrement not promoted

["jsm28 at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from jsm28 at gcc dot gnu dot org  2008-03-20 13:29 -------
Created an attachment (id=15349)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15349&action=view)
Gimplification-time patch

Changing at build_unary_op time runs into OpenMP problems - the OpenMP code
needs the trees to correspond more directly to the increments and decrements in
the source code.

Changing at gimplification time, as in the attached patch, avoids that problem,
but a number of gcc.dg/vect tests regress because of the changes to the code
for increment/decrement of types that get promoted.

FAIL: gcc.dg/vect/pr18536.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/pr30771.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/vect-iv-8a.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/vect-multitypes-11.c scan-tree-dump-times vect "vectorized 1
loops" 2
FAIL: gcc.dg/vect/vect-reduc-dot-u16a.c scan-tree-dump-times vect "vectorized 1
loops" 2
FAIL: gcc.dg/vect/slp-21.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/no-scevccp-outer-13.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-14.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-16.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-17.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-19.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-21.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1
FAIL: gcc.dg/vect/no-scevccp-outer-7.c scan-tree-dump-times vect "OUTER LOOP
VECTORIZED." 1


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35634