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| author | Richard Henderson | 2016-06-20 07:59:13 +0200 |
|---|---|---|
| committer | Richard Henderson | 2016-07-06 05:50:13 +0200 |
| commit | 59d7c14eeff8d2ad7f61aed86ce5a176113bc153 (patch) | |
| tree | a35fd8794ff364683cd31b650affc4f3d9289ce1 /tcg/tci | |
| parent | tcg: Fix name for high-half register (diff) | |
| download | qemu-59d7c14eeff8d2ad7f61aed86ce5a176113bc153.tar.gz qemu-59d7c14eeff8d2ad7f61aed86ce5a176113bc153.tar.xz qemu-59d7c14eeff8d2ad7f61aed86ce5a176113bc153.zip | |
tcg: Optimize spills of constants
While we can store constants via constrants on INDEX_op_st_i32 et al,
we weren't able to spill constants to backing store.
Add a new backend interface, tcg_out_sti, which may store the constant
(and is allowed to fail). Rearrange the temp_* helpers so that we only
attempt to directly store a constant when the temp is becoming dead/free.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/tci')
| -rw-r--r-- | tcg/tci/tcg-target.inc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tcg/tci/tcg-target.inc.c b/tcg/tci/tcg-target.inc.c index fa74d5278e..3c47ea7a9e 100644 --- a/tcg/tci/tcg-target.inc.c +++ b/tcg/tci/tcg-target.inc.c @@ -834,6 +834,12 @@ static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, old_code_ptr[1] = s->code_ptr - old_code_ptr; } +static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, + TCGReg base, intptr_t ofs) +{ + return false; +} + /* Test if a constant matches the constraint. */ static int tcg_target_const_match(tcg_target_long val, TCGType type, const TCGArgConstraint *arg_ct) |