2026-10-19 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* src/SDCCcse.c: A zero-offset structure member access introduces
	  a pointer cast. Treating that cast as sensitive to signedness
	  prevented pointer copy propagation and reuse of the result of a
	  condition-guarded load of the first member's value. The
	  dereference therefore used a different temporary from the one
	  known to be non-null (bug #4148).
	  Classify casts from pointer types as insensitive to signedness
	  so that the result of such a member load can be reused.
	* support/valdiag/tests/bug-4148.c: Test guarded and unsafe member
	  loads at zero and nonzero offsets.

2026-10-19 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* src/SDCCicode.c (geniCodeStruct): Preserve volatility inherited
	  from the enclosing structure on the member's outer qualifier
	  (bug #4149).
	* src/SDCCcse.c (findCheaperOp): Do not discard volatile target
	  qualification when substituting a pointer operand.
	* support/valdiag/tests/bug-4149.c: Test repeated
	  volatile member reads at zero and nonzero offsets, direct
	  qualification, and valid single-read local pointer guards.

2026-10-19 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* src/SDCCast.c: Reject non-arithmetic, non-pointer increment
	  operands (bug #4136).
	  Check the operand type before marking it as an lvalue for
	  increment or decrement. This rejects nullptr_t and aggregate
	  operands for both prefix and postfix forms, while retaining
	  arithmetic and pointer operations.
	* support/valdiag/tests/bug-4136.c: Negative tests for increment
	  and decrement of nullptr_t.  Negative tests for increment of an
	  object of structure type and a const int.  Positive tests for
	  increment and decrement of pointer, float and int objects.

2026-10-19 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* src/SDCCast.c,
	  src/SDCCsymt.c,
	  src/SDCCsymt.h,
	  support/valdiag/tests/bug-4126.c,
	  support/regression/tests/bug-4126.c:
	  Diagnose incompatible pointer operands of conditional expressions
	  (bug #4126).
	  Apply array decay before checking the referenced types of operands
	  of the conditional operator that have pointer type.  The obvious
	  way to fix this would be to reuse diagnoseDissimilarPtrTargetTypes
	  but its style of output is inappropriate because there is no
	  'from' or 'to' ordering between the two operands.  Instead, a new
	  function, printWithTypes, is used for both W_INCOMPAT_PTYPES and
	  the existing potential E_TYPE_MISMATCH.

2026-10-18 Gabriele Gorla <gorlik@yahoo.com>

	* sdas/asxxsrc/asout.c
	  Partially revert change #16948 to correct bug in lst/rst output.

2026-10-18 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* support/regression/tests/bug-4107.c: Use explicitly nonbanked
	  function pointers when testing the distinction from banked pointers
	  (bug #4107). Functions are banked by default in MCS51 huge mode.

2026-10-18 Christopher Bazley <chris.bazley.wg14@gmail.com>

	* src/SDCCast.c, src/SDCCerr.c, src/SDCCerr.h: Diagnose compatible
	  types in a generic association list, including unselected
	  associations (bug #4134).
	  Identify whichever is the later association and include the earlier
	  file and line.
	  Use type compatibility for the comparison so that unspecified and
	  specified array bounds are handled correctly.
	* support/valdiag/tests/bug-4134.c: Check duplicate and distinct types,
	  compatible array bounds and multiline diagnostic locations.

2026-10-18 Maarten Brock <sourceforge.brock AT dse.nl>

	* src/mcs51/ralloc.c: fixed bug #4153
	* support/regression/tests/bug-4153.c: from patch in bug #4153
	* support/regression/tests/genptrs.c: fixed warning

2026-10-18 Gabriele Gorla <gorlik@yahoo.com>

	* src/SDCCicode.c,
	  src/mcs51/gen.c:
	  Change true/false to lowercase, fix typo.
	* sdas/as6500/r65mch.c,
	  sdas/as6500/r65pst.c,
	  sdas/as6808/m08mch.c,
	  sdas/as6808/m08pst.c,
	  sdas/as8051/i51mch.c,
	  sdas/as8051/i51pst.c,
	  sdas/as8xcxxx/ds8pst.c,
	  sdas/asgb/gbpst.c,
	  sdas/asrab/rabpst.c,
	  sdas/astlcs90/t90pst.c,
	  sdas/asxxsrc/asmain.c,
	  sdas/asxxsrc/asout.c,