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| author | Alexandre Oliva <aoliva@redhat.com> | 2000-12-13 21:24:03 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2000-12-13 21:24:03 +0000 |
| commit | e68a6ce10ead591f90742ada0f513a66977fe889 (patch) | |
| tree | 4a996de2ddd3f5c1f463cf95ac72c5df06993459 | |
| parent | 7c757aa48684aba8272a0ea3fe911fdb2445dd91 (diff) | |
| download | gcc-e68a6ce10ead591f90742ada0f513a66977fe889.zip gcc-e68a6ce10ead591f90742ada0f513a66977fe889.tar.gz gcc-e68a6ce10ead591f90742ada0f513a66977fe889.tar.bz2 | |
function.c (assign_parms): Optimize incoming PARALLELs into REGs if possible.
* function.c (assign_parms): Optimize incoming PARALLELs into
REGs if possible.
From-SVN: r38233
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/function.c | 20 |
2 files changed, 25 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 79fa00c..b3051b6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2000-12-13 Alexandre Oliva <aoliva@redhat.com> + + * function.c (assign_parms): Optimize incoming PARALLELs into + REGs if possible. + 2000-12-13 Bruce Korb <bkorb@gnu.org> * fixinc/Makefile.in(*): substantial rewrite to accommodate systems diff --git a/gcc/function.c b/gcc/function.c index 5e01c65..0799216 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -4549,6 +4549,26 @@ assign_parms (fndecl) && nominal_mode != BLKmode && nominal_mode != passed_mode) stack_parm = 0; + /* When an argument is passed in multiple locations, we can't + make use of this information, but we can save some copying if + the whole argument is passed in a single register. */ + if (GET_CODE (entry_parm) == PARALLEL + && nominal_mode != BLKmode && passed_mode != BLKmode) + { + int i, len = XVECLEN (entry_parm, 0); + + for (i = 0; i < len; i++) + if (XEXP (XVECEXP (entry_parm, 0, i), 0) != NULL_RTX + && GET_CODE (XEXP (XVECEXP (entry_parm, 0, i), 0)) == REG + && (GET_MODE (XEXP (XVECEXP (entry_parm, 0, i), 0)) + == passed_mode) + && XINT (XEXP (XVECEXP (entry_parm, 0, i), 1), 0) == 0) + { + entry_parm = XEXP (XVECEXP (entry_parm, 0, i), 0); + break; + } + } + /* ENTRY_PARM is an RTX for the parameter as it arrives, in the mode in which it arrives. STACK_PARM is an RTX for a stack slot where the parameter can live |