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| author | liuhongt <hongtao.liu@intel.com> | 2021-06-01 09:00:57 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2021-06-07 10:25:03 +0800 |
| commit | 16465ceb06cc1f65cfca3c0eb2c1ee27ab03bdfd (patch) | |
| tree | 7afa0001810636d4623eff17ba18d988d79b4ac4 /gcc/final.c | |
| parent | 7d6987e90d1181de8dc51f9ba2313052faea080e (diff) | |
| download | gcc-16465ceb06cc1f65cfca3c0eb2c1ee27ab03bdfd.zip gcc-16465ceb06cc1f65cfca3c0eb2c1ee27ab03bdfd.tar.gz gcc-16465ceb06cc1f65cfca3c0eb2c1ee27ab03bdfd.tar.bz2 | |
CALL_INSN may not be a real function call.
Use "used" flag for CALL_INSN to indicate it's a fake call. If it's a
fake call, it won't have its own function stack.
gcc/ChangeLog
PR target/82735
* df-scan.c (df_get_call_refs): When call_insn is a fake call,
it won't use stack pointer reg.
* final.c (leaf_function_p): When call_insn is a fake call, it
won't affect caller as a leaf function.
* reg-stack.c (callee_clobbers_any_stack_reg): New.
(subst_stack_regs): When call_insn doesn't clobber any stack
reg, don't clear the arguments.
* rtl.c (shallow_copy_rtx): Don't clear flag used when orig is
a insn.
* shrink-wrap.c (requires_stack_frame_p): No need for stack
frame for a fake call.
* rtl.h (FAKE_CALL_P): New macro.
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/final.c b/gcc/final.c index 38c3d70..dba0b0a 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -4106,7 +4106,8 @@ leaf_function_p (void) for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) { if (CALL_P (insn) - && ! SIBLING_CALL_P (insn)) + && ! SIBLING_CALL_P (insn) + && ! FAKE_CALL_P (insn)) return 0; if (NONJUMP_INSN_P (insn) && GET_CODE (PATTERN (insn)) == SEQUENCE |