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aarch64: PR target/95526: Fix gimplification of varargs

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This patch fixes a latent bug exposed by
eb72dc663e9070b281be83a80f6f838a3a878822 in the aarch64 backend that was
causing wrong codegen and several testsuite failures. See the discussion
on the bug for details.

Bootstrapped and regtested on aarch64-linux-gnu. Cleaned up several
failing tests and no new fails introduced.

2020-06-04  Richard Biener  <rguenther@suse.de>

gcc/:

	* config/aarch64/aarch64.c (aarch64_gimplify_va_arg_expr):
	Ensure that tmp_ha is marked TREE_ADDRESSABLE.
This commit is contained in:
Richard Biener 2020-06-04 16:26:36 +01:00 committed by Alex Coplan
parent 1980ffec48
commit ab56390384
1 changed files with 1 additions and 0 deletions
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gcc/config/aarch64/aarch64.c
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@ -16370,6 +16370,7 @@ aarch64_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
}
/* *(field_ptr_t)&ha = *((field_ptr_t)vr_saved_area */
TREE_ADDRESSABLE (tmp_ha) = 1;
tmp_ha = build1 (ADDR_EXPR, field_ptr_t, tmp_ha);
addr = t;
t = fold_convert (field_ptr_t, addr);