diff options
| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-12-02 18:11:17 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-12-02 18:11:17 -0500 |
| commit | 2132517db072e7c3d48c8594d6116e1a743ebf14 (patch) | |
| tree | 84dc9ac84b1f465a982486be8bb0920bb29da005 | |
| parent | 83b93f40ff739b33969532e40836e45fda586665 (diff) | |
| download | gcc-2132517db072e7c3d48c8594d6116e1a743ebf14.zip gcc-2132517db072e7c3d48c8594d6116e1a743ebf14.tar.gz gcc-2132517db072e7c3d48c8594d6116e1a743ebf14.tar.bz2 | |
(expand_inline_function): If called function calls alloca, save and
restore SP around its call.
From-SVN: r8601
| -rw-r--r-- | gcc/integrate.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/integrate.c b/gcc/integrate.c index a419350..12f0389 100644 --- a/gcc/integrate.c +++ b/gcc/integrate.c @@ -1167,6 +1167,7 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add int nargs; rtx local_return_label = 0; rtx loc; + rtx stack_save = 0; rtx temp; struct inline_remap *map; rtx cc0_insn = 0; @@ -1648,6 +1649,13 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add global_const_equiv_map = map->const_equiv_map; global_const_equiv_map_size = map->const_equiv_map_size; + /* If the called fucntion does an alloca, save and restore the + frame pointer around the call. This saves stack space, but + also is required if this inline is being done between two + pushes. */ + if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_CALLS_ALLOCA) + emit_stack_save (SAVE_BLOCK, &stack_save, NULL_RTX); + /* Now copy the insns one by one. Do this in two passes, first the insns and then their REG_NOTES, just like save_for_inline. */ @@ -1868,6 +1876,10 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add if (local_return_label) emit_label (local_return_label); + /* Restore the stack pointer if we saved it above. */ + if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_CALLS_ALLOCA) + emit_stack_restore (SAVE_BLOCK, stack_save, NULL_RTX); + /* Make copies of the decls of the symbols in the inline function, so that the copies of the variables get declared in the current function. Set up things so that lookup_static_chain knows that to interpret registers |