target/105459 - allow delayed target option node fixup
The following avoids the need to massage the target optimization
node at WPA time when we fixup the optimization node, copying
FP related flags from callee to caller. The target is already
set up to fixup, but that only works when not switching between
functions. After fixing that the fixup is then done at LTRANS
time when materializing the function.
2022-07-01 Richard Biener <rguenthert@suse.de>
PR target/105459
* config/i386/i386-options.cc (ix86_set_current_function):
Rebuild the target optimization node whenever necessary,
not only when the optimization node didn't change.
* gcc.dg/lto/pr105459_0.c: New testcase.
(cherry picked from commit 4c94382a13
)
This commit is contained in:
parent
f25b0b91d1
commit
4ed850a568
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@ -3229,28 +3229,22 @@ ix86_set_current_function (tree fndecl)
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if (new_tree == NULL_TREE)
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if (new_tree == NULL_TREE)
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new_tree = target_option_default_node;
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new_tree = target_option_default_node;
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if (old_tree != new_tree)
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bool fp_flag_change
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{
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= (flag_unsafe_math_optimizations
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cl_target_option_restore (&global_options, &global_options_set,
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TREE_TARGET_OPTION (new_tree));
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if (TREE_TARGET_GLOBALS (new_tree))
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restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
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else if (new_tree == target_option_default_node)
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restore_target_globals (&default_target_globals);
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else
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TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
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}
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else if (flag_unsafe_math_optimizations
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!= TREE_TARGET_OPTION (new_tree)->x_ix86_unsafe_math_optimizations
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!= TREE_TARGET_OPTION (new_tree)->x_ix86_unsafe_math_optimizations
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|| (flag_excess_precision
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|| (flag_excess_precision
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!= TREE_TARGET_OPTION (new_tree)->x_ix86_excess_precision))
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!= TREE_TARGET_OPTION (new_tree)->x_ix86_excess_precision));
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if (old_tree != new_tree || fp_flag_change)
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{
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{
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cl_target_option_restore (&global_options, &global_options_set,
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cl_target_option_restore (&global_options, &global_options_set,
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TREE_TARGET_OPTION (new_tree));
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TREE_TARGET_OPTION (new_tree));
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if (fp_flag_change)
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{
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ix86_excess_precision = flag_excess_precision;
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ix86_excess_precision = flag_excess_precision;
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ix86_unsafe_math_optimizations = flag_unsafe_math_optimizations;
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ix86_unsafe_math_optimizations = flag_unsafe_math_optimizations;
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DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_tree
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DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_tree
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= build_target_option_node (&global_options, &global_options_set);
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= build_target_option_node (&global_options, &global_options_set);
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}
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if (TREE_TARGET_GLOBALS (new_tree))
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if (TREE_TARGET_GLOBALS (new_tree))
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restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
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restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
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else if (new_tree == target_option_default_node)
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else if (new_tree == target_option_default_node)
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@ -0,0 +1,35 @@
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/* { dg-lto-do link } */
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/* { dg-lto-options { { -flto -O1 } } } */
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double m;
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int n;
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__attribute__ ((optimize ("-funsafe-math-optimizations")))
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void
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bar (int x)
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{
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n = x;
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m = n;
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}
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__attribute__ ((flatten))
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void
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foo (int x)
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{
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bar (x);
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}
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void
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quux (void)
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{
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++n;
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}
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int
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main (void)
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{
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foo (0);
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quux ();
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return 0;
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}
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