diff options
| author | vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-06-20 08:01:52 +0000 |
|---|---|---|
| committer | vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-06-20 08:01:52 +0000 |
| commit | cda974e62c1c343aa221d752553e1a2cf057c83d (patch) | |
| tree | ab49df80b9e730bae5afc85dbfaed38b34cc8701 /gcc/final.c | |
| parent | a9909cdd1e592aa802bd2226ceb13ecb495353fb (diff) | |
| download | gcc-cda974e62c1c343aa221d752553e1a2cf057c83d.tar.gz | |
Don't save function_used_regs if it contains all call_used_regs
2014-06-20 Tom de Vries <tom@codesourcery.com>
* final.c (collect_fn_hard_reg_usage): Don't save function_used_regs if
it contains all call_used_regs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211840 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/final.c b/gcc/final.c index e39930d4207..e67e84b8a2e 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -4795,6 +4795,11 @@ collect_fn_hard_reg_usage (void) SET_HARD_REG_BIT (function_used_regs, i); #endif + /* The information we have gathered is only interesting if it exposes a + register from the call_used_regs that is not used in this function. */ + if (hard_reg_set_subset_p (call_used_reg_set, function_used_regs)) + return; + node = cgraph_rtl_info (current_function_decl); gcc_assert (node != NULL); |