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arm: Extend the PR94780 fix to arm

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Essentially the same fix as for x86.

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/arm/arm-builtins.c (arm_atomic_assign_expand_fenv): Use
	TARGET_EXPR instead of MODIFY_EXPR for the first assignments to
	fenv_var and new_fenv_var.
This commit is contained in:
Richard Sandiford 2020-04-29 11:51:38 +01:00
parent 127abeb2e8
commit 1d7ead9cba
2 changed files with 11 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2020-04-29 Richard Sandiford <richard.sandiford@arm.com>
* config/arm/arm-builtins.c (arm_atomic_assign_expand_fenv): Use
TARGET_EXPR instead of MODIFY_EXPR for the first assignments to
fenv_var and new_fenv_var.
2020-04-29 Richard Sandiford <richard.sandiford@arm.com>
* doc/sourcebuild.texi (arm_arch_v8a_hard_ok): Document new

9
gcc/config/arm/arm-builtins.c
View File

@ -4167,8 +4167,9 @@ arm_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
mask = build_int_cst (unsigned_type_node,
~((ARM_FE_ALL_EXCEPT << ARM_FE_EXCEPT_SHIFT)
| ARM_FE_ALL_EXCEPT));
ld_fenv = build2 (MODIFY_EXPR, unsigned_type_node,
fenv_var, build_call_expr (get_fpscr, 0));
ld_fenv = build4 (TARGET_EXPR, unsigned_type_node,
fenv_var, build_call_expr (get_fpscr, 0),
NULL_TREE, NULL_TREE);
masked_fenv = build2 (BIT_AND_EXPR, unsigned_type_node, fenv_var, mask);
hold_fnclex = build_call_expr (set_fpscr, 1, masked_fenv);
*hold = build2 (COMPOUND_EXPR, void_type_node,
@ -4189,8 +4190,8 @@ arm_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
__atomic_feraiseexcept (new_fenv_var); */
new_fenv_var = create_tmp_var_raw (unsigned_type_node);
reload_fenv = build2 (MODIFY_EXPR, unsigned_type_node, new_fenv_var,
build_call_expr (get_fpscr, 0));
reload_fenv = build4 (TARGET_EXPR, unsigned_type_node, new_fenv_var,
build_call_expr (get_fpscr, 0), NULL_TREE, NULL_TREE);
restore_fnenv = build_call_expr (set_fpscr, 1, fenv_var);
atomic_feraiseexcept = builtin_decl_implicit (BUILT_IN_ATOMIC_FERAISEEXCEPT);
update_call = build_call_expr (atomic_feraiseexcept, 1,