===================================================================
@@ -11707,12 +11707,16 @@
;; ??? reload might clobber r0 if we use it explicitly in the RTL before
;; reload; using a R0_REGS pseudo reg is likely to give poor code.
;; So we keep the use of r0 hidden in a R0_REGS clobber until after reload.
+;;
+;; The use on the T_REG in the casesi_worker* patterns links the bounds
+;; checking insns and the table memory access. See also PR 69713.
(define_insn "casesi_worker_0"
[(set (match_operand:SI 0 "register_operand" "=r,r")
(unspec:SI [(match_operand:SI 1 "register_operand" "0,r")
(label_ref (match_operand 2 "" ""))] UNSPEC_CASESI))
(clobber (match_scratch:SI 3 "=X,1"))
- (clobber (match_scratch:SI 4 "=&z,z"))]
+ (clobber (match_scratch:SI 4 "=&z,z"))
+ (use (reg:SI T_REG))]
"TARGET_SH1"
"#")
@@ -11721,7 +11725,8 @@
(unspec:SI [(match_operand:SI 1 "register_operand" "")
(label_ref (match_operand 2 "" ""))] UNSPEC_CASESI))
(clobber (match_scratch:SI 3 ""))
- (clobber (match_scratch:SI 4 ""))]
+ (clobber (match_scratch:SI 4))
+ (use (reg:SI T_REG))]
"TARGET_SH1 && ! TARGET_SH2 && reload_completed"
[(set (reg:SI R0_REG) (unspec:SI [(label_ref (match_dup 2))] UNSPEC_MOVA))
(parallel [(set (match_dup 0)
@@ -11739,7 +11744,8 @@
(unspec:SI [(match_operand:SI 1 "register_operand" "")
(label_ref (match_operand 2 "" ""))] UNSPEC_CASESI))
(clobber (match_scratch:SI 3 ""))
- (clobber (match_scratch:SI 4 ""))]
+ (clobber (match_scratch:SI 4))
+ (use (reg:SI T_REG))]
"TARGET_SH2 && reload_completed"
[(set (reg:SI R0_REG) (unspec:SI [(label_ref (match_dup 2))] UNSPEC_MOVA))
(parallel [(set (match_dup 0)
Hi, The attached patch fixes PR 69713. For details please see the comments in the PR. Tested on trunk and sh-elf with make -k check RUNTESTFLAGS="--target_board=sh-sim\{-m2/-ml,-m2/-mb, -m2a/-mb,-m4/-ml,-m4/-mb,-m4a/-ml,-m4a/-mb}" Committed to trunk as r233324, 5 branch as r233326 and 4.9 branch as r233329. Cheers, Oleg gcc/ChangeLog PR target/69713 * config/sh/sh.md (casesi_worker_0): Add T_REG use.