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gcc: xtensa: fix PR target/108876

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gcc/
	PR target/108876
	* config/xtensa/xtensa.cc (xtensa_expand_epilogue): Drop emit_use
	for A0_REG.
	* config/xtensa/xtensa.md (sibcall, sibcall_internal)
	(sibcall_value, sibcall_value_internal): Add 'use' expression
	for A0_REG.
This commit is contained in:
Max Filippov 2023-02-21 11:49:35 -08:00
parent 6c1b825b3d
commit b2ef02e8cb
2 changed files with 13 additions and 9 deletions
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2
gcc/config/xtensa/xtensa.cc
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@ -3548,8 +3548,6 @@ xtensa_expand_epilogue (bool sibcall_p)
gen_frame_mem (SImode, x));
}
}
if (sibcall_p)
emit_use (gen_rtx_REG (SImode, A0_REG));
if (cfun->machine->current_frame_size > 0)
{

20
gcc/config/xtensa/xtensa.md
View file

@ -2369,8 +2369,10 @@
(set_attr "length" "3")])
(define_expand "sibcall"
[(call (match_operand 0 "memory_operand" "")
(match_operand 1 "" ""))]
[(parallel [
(call (match_operand 0 "memory_operand" "")
(match_operand 1 "" ""))
(use (reg:SI A0_REG))])]
"!TARGET_WINDOWED_ABI"
{
xtensa_prepare_expand_call (0, operands);
@ -2378,7 +2380,8 @@
(define_insn "sibcall_internal"
[(call (mem:SI (match_operand:SI 0 "call_insn_operand" "nic"))
(match_operand 1 "" "i"))]
(match_operand 1 "" "i"))
(use (reg:SI A0_REG))]
"!TARGET_WINDOWED_ABI && SIBLING_CALL_P (insn)"
{
return xtensa_emit_sibcall (0, operands);
@ -2388,9 +2391,11 @@
(set_attr "length" "3")])
(define_expand "sibcall_value"
[(set (match_operand 0 "register_operand" "")
(call (match_operand 1 "memory_operand" "")
(match_operand 2 "" "")))]
[(parallel [
(set (match_operand 0 "register_operand" "")
(call (match_operand 1 "memory_operand" "")
(match_operand 2 "" "")))
(use (reg:SI A0_REG))])]
"!TARGET_WINDOWED_ABI"
{
xtensa_prepare_expand_call (1, operands);
@ -2399,7 +2404,8 @@
(define_insn "sibcall_value_internal"
[(set (match_operand 0 "register_operand" "=a")
(call (mem:SI (match_operand:SI 1 "call_insn_operand" "nic"))
(match_operand 2 "" "i")))]
(match_operand 2 "" "i")))
(use (reg:SI A0_REG))]
"!TARGET_WINDOWED_ABI && SIBLING_CALL_P (insn)"
{
return xtensa_emit_sibcall (1, operands);