* [Ada] Preserve unchecked conversion of string constant
@ 2022-05-19 14:16 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2022-05-19 14:16 UTC (permalink / raw)
To: gcc-patches; +Cc: Eric Botcazou
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This makes it possible to pass the result to a C function directly.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* gcc-interface/utils.cc (unchecked_convert): Do not fold a string
constant if the target type is pointer to character.
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diff --git a/gcc/ada/gcc-interface/utils.cc b/gcc/ada/gcc-interface/utils.cc
--- a/gcc/ada/gcc-interface/utils.cc
+++ b/gcc/ada/gcc-interface/utils.cc
@@ -5637,6 +5637,13 @@ unchecked_convert (tree type, tree expr, bool notrunc_p)
return unchecked_convert (type, expr, notrunc_p);
}
+ /* If we are converting a string constant to a pointer to character, make
+ sure that the string is not folded into an integer constant. */
+ else if (TREE_CODE (expr) == STRING_CST
+ && POINTER_TYPE_P (type)
+ && TYPE_STRING_FLAG (TREE_TYPE (type)))
+ expr = build1 (VIEW_CONVERT_EXPR, type, expr);
+
/* Otherwise, just build a VIEW_CONVERT_EXPR of the expression. */
else
{
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