diff options
| author | Ian Lance Taylor <iant@google.com> | 2017-03-20 17:43:08 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <iant@google.com> | 2017-03-20 17:43:08 +0000 |
| commit | a913e349f9662685578573252caa2f723372605b (patch) | |
| tree | 2f86b99eeb5b9cd8832bcb6d5c42f7815353cf95 | |
| parent | b0af987acd92ebd9b97592d97702bfc5848b31de (diff) | |
* config/i386/i386.c (ix86_function_regparm): Save an extra
register for -fsplit-stack with DECL_STATIC_CHAIN.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@246286 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 10 |
2 files changed, 13 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7164d10df6b..1385d92bcdf 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2017-03-20 Ian Lance Taylor <iant@google.com> + + * config/i386/i386.c (ix86_function_regparm): Save an extra + register for -fsplit-stack with DECL_STATIC_CHAIN. + 2017-03-17 Palmer Dabbelt <palmer@dabbelt.com> PR target/79912 diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index f58d529604c..259f97b5a10 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -7975,8 +7975,14 @@ ix86_function_regparm (const_tree type, const_tree decl) local_regparm = 2; /* Save a register for the split stack. */ - if (local_regparm == 3 && flag_split_stack) - local_regparm = 2; + if (flag_split_stack) + { + if (local_regparm == 3) + local_regparm = 2; + else if (local_regparm == 2 + && DECL_STATIC_CHAIN (target->decl)) + local_regparm = 1; + } /* Each fixed register usage increases register pressure, so less registers should be used for argument passing. |