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| author | Sylvain Henry <sylvain@haskus.fr> | 2020-06-02 19:27:13 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-06-23 22:48:18 -0400 |
| commit | 7750bd456f32c3e91b9165587fe290122b9c2444 (patch) | |
| tree | 4413a4e945b731aaea00a2e0195d9f546053c5b0 /rts | |
| parent | 809caedffe489931efa8c96a60eaed6d7ff739b9 (diff) | |
| download | haskell-7750bd456f32c3e91b9165587fe290122b9c2444.tar.gz | |
Cmm: introduce SAVE_REGS/RESTORE_REGS
We don't want to save both Fn and Dn register sets on x86-64 as they are
aliased to the same arch register (XMMn).
Moreover, when SAVE_STGREGS was used in conjunction with `jump foo [*]`
which makes a set of Cmm registers alive so that they cover all arch
registers used to pass parameter, we could have Fn, Dn and XMMn alive at
the same time. It made the LLVM code generator choke (see #17920).
Now `SAVE_REGS/RESTORE_REGS` and `jump foo [*]` use the same set of
registers.
Diffstat (limited to 'rts')
| -rw-r--r-- | rts/StgMiscClosures.cmm | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/rts/StgMiscClosures.cmm b/rts/StgMiscClosures.cmm index 85c1ad398e..4293dfb787 100644 --- a/rts/StgMiscClosures.cmm +++ b/rts/StgMiscClosures.cmm @@ -31,14 +31,14 @@ INFO_TABLE_RET (stg_stack_underflow_frame, UNDERFLOW_FRAME, W_ new_tso; W_ ret_off; - SAVE_STGREGS + SAVE_REGS(); SAVE_THREAD_STATE(); (ret_off) = foreign "C" threadStackUnderflow(MyCapability() "ptr", CurrentTSO); LOAD_THREAD_STATE(); - RESTORE_STGREGS + RESTORE_REGS(); jump %ENTRY_CODE(Sp(ret_off)) [*]; // NB. all registers live! } |