From 07fe4af4d51d74b63a76ea632d4db01d1f69f037 Mon Sep 17 00:00:00 2001 From: Segher Boessenkool Date: Wed, 18 Mar 2020 21:58:45 +0000 Subject: [PATCH] rs6000: Add back some w* constraints (PR91886) In May and June last year I deleted many of our (vector) constraints. We can now just use "wa" for those, together with some other conditions, which can be per alternative using the "enabled" attribute (which in turn primarily uses the "isa" attribute). But, it turns out that Clang implements some of those constraints as well, and at least musl uses some of them. It is easy for us to add those contraints back (as undocumented aliases to "wa", which always did mean the same thing for valid inline assembler code), so do that. gcc/ * config/rs6000/constraints.md (wd, wf, wi, ws, ww): New undocumented aliases for "wa". --- gcc/ChangeLog | 5 +++++ gcc/config/rs6000/constraints.md | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3a2e491113e..66202f0253f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2020-03-18 Segher Boessenkool + + * config/rs6000/constraints.md (wd, wf, wi, ws, ww): New undocumented + aliases for "wa". + 2020-03-12 Richard Sandiford PR rtl-optimization/90275 diff --git a/gcc/config/rs6000/constraints.md b/gcc/config/rs6000/constraints.md index 4074a11da23..c600535e3ea 100644 --- a/gcc/config/rs6000/constraints.md +++ b/gcc/config/rs6000/constraints.md @@ -45,6 +45,17 @@ FPR (@code{vs0}@dots{}@code{vs31} are @code{f0}@dots{}@code{f31}) or a VR (@code{vs32}@dots{}@code{vs63} are @code{v0}@dots{}@code{v31}).") +(define_register_constraint "wd" "rs6000_constraints[RS6000_CONSTRAINT_wa]" + "@internal A compatibility alias for @code{wa}.") +(define_register_constraint "wf" "rs6000_constraints[RS6000_CONSTRAINT_wa]" + "@internal A compatibility alias for @code{wa}.") +(define_register_constraint "wi" "rs6000_constraints[RS6000_CONSTRAINT_wa]" + "@internal A compatibility alias for @code{wa}.") +(define_register_constraint "ws" "rs6000_constraints[RS6000_CONSTRAINT_wa]" + "@internal A compatibility alias for @code{wa}.") +(define_register_constraint "ww" "rs6000_constraints[RS6000_CONSTRAINT_wa]" + "@internal A compatibility alias for @code{wa}.") + (define_register_constraint "h" "SPECIAL_REGS" "@internal A special register (@code{vrsave}, @code{ctr}, or @code{lr}).") -- 2.30.2