cfgexpand: Handle WIDEN_{PLUS,MINUS}_EXPR and VEC_WIDEN_{PLUS,MINUS}_{HI,LO}_EXPR in expand_debug_expr [PR108967]
Commit Message
Hi!
When these tree codes were introduced, expand_debug_expr hasn't been
updated to handle them. For the VEC_*_EXPR we currently mostly punt, the
non-vector ones can be handled easily. In release compilers this doesn't
ICE, but with checking we ICE so that we make sure to handle all the needed
tree codes there.
Bootstrapped/regtested on x86_64-linux and i686-linux, additionally tested
on the testcase with cross to aarch64-linux, ok for trunk?
2023-03-01 Jakub Jelinek <jakub@redhat.com>
PR debug/108967
* cfgexpand.cc (expand_debug_expr): Handle WIDEN_{PLUS,MINUS}_EXPR
and VEC_WIDEN_{PLUS,MINUS}_{HI,LO}_EXPR.
* g++.dg/debug/pr108967.C: New test.
Jakub
Comments
On Wed, 1 Mar 2023, Jakub Jelinek wrote:
> Hi!
>
> When these tree codes were introduced, expand_debug_expr hasn't been
> updated to handle them. For the VEC_*_EXPR we currently mostly punt, the
> non-vector ones can be handled easily. In release compilers this doesn't
> ICE, but with checking we ICE so that we make sure to handle all the needed
> tree codes there.
>
> Bootstrapped/regtested on x86_64-linux and i686-linux, additionally tested
> on the testcase with cross to aarch64-linux, ok for trunk?
OK.
> 2023-03-01 Jakub Jelinek <jakub@redhat.com>
>
> PR debug/108967
> * cfgexpand.cc (expand_debug_expr): Handle WIDEN_{PLUS,MINUS}_EXPR
> and VEC_WIDEN_{PLUS,MINUS}_{HI,LO}_EXPR.
>
> * g++.dg/debug/pr108967.C: New test.
>
> --- gcc/cfgexpand.cc.jj 2023-02-21 11:44:48.479464567 +0100
> +++ gcc/cfgexpand.cc 2023-02-28 16:21:45.068784055 +0100
> @@ -5365,6 +5365,10 @@ expand_debug_expr (tree exp)
> case VEC_WIDEN_MULT_ODD_EXPR:
> case VEC_WIDEN_LSHIFT_HI_EXPR:
> case VEC_WIDEN_LSHIFT_LO_EXPR:
> + case VEC_WIDEN_PLUS_HI_EXPR:
> + case VEC_WIDEN_PLUS_LO_EXPR:
> + case VEC_WIDEN_MINUS_HI_EXPR:
> + case VEC_WIDEN_MINUS_LO_EXPR:
> case VEC_PERM_EXPR:
> case VEC_DUPLICATE_EXPR:
> case VEC_SERIES_EXPR:
> @@ -5401,6 +5405,8 @@ expand_debug_expr (tree exp)
> case WIDEN_MULT_EXPR:
> case WIDEN_MULT_PLUS_EXPR:
> case WIDEN_MULT_MINUS_EXPR:
> + case WIDEN_PLUS_EXPR:
> + case WIDEN_MINUS_EXPR:
> if (SCALAR_INT_MODE_P (GET_MODE (op0))
> && SCALAR_INT_MODE_P (mode))
> {
> @@ -5413,6 +5419,10 @@ expand_debug_expr (tree exp)
> op1 = simplify_gen_unary (ZERO_EXTEND, mode, op1, inner_mode);
> else
> op1 = simplify_gen_unary (SIGN_EXTEND, mode, op1, inner_mode);
> + if (TREE_CODE (exp) == WIDEN_PLUS_EXPR)
> + return simplify_gen_binary (PLUS, mode, op0, op1);
> + else if (TREE_CODE (exp) == WIDEN_MINUS_EXPR)
> + return simplify_gen_binary (MINUS, mode, op0, op1);
> op0 = simplify_gen_binary (MULT, mode, op0, op1);
> if (TREE_CODE (exp) == WIDEN_MULT_EXPR)
> return op0;
> --- gcc/testsuite/g++.dg/debug/pr108967.C.jj 2023-02-28 17:27:27.922636974 +0100
> +++ gcc/testsuite/g++.dg/debug/pr108967.C 2023-02-28 17:27:20.571741186 +0100
> @@ -0,0 +1,41 @@
> +// PR debug/108967
> +// { dg-do compile }
> +
> +struct F { unsigned short r[8]; };
> +extern void foo (F);
> +
> +static inline F
> +bar (F a, F b)
> +{
> + for (int i = 0; i < 8; ++i)
> + a.r[i] = a.r[i] + b.r[i] < (unsigned short) -1 ? a.r[i] + b.r[i] : (unsigned short) -1;
> + return a;
> +}
> +
> +static inline void
> +baz (F v)
> +{
> + foo (v);
> +}
> +
> +void
> +qux (F a, F b)
> +{
> + F c = bar (a, b);
> + baz (c);
> +}
> +
> +static inline F
> +corge (F a, F b)
> +{
> + for (int i = 0; i < 8; ++i)
> + a.r[i] = a.r[i] - b.r[i] > 0 ? a.r[i] - b.r[i] : 0;
> + return a;
> +}
> +
> +void
> +garply (F a, F b)
> +{
> + F c = corge (a, b);
> + baz (c);
> +}
>
> Jakub
>
>
@@ -5365,6 +5365,10 @@ expand_debug_expr (tree exp)
case VEC_WIDEN_MULT_ODD_EXPR:
case VEC_WIDEN_LSHIFT_HI_EXPR:
case VEC_WIDEN_LSHIFT_LO_EXPR:
+ case VEC_WIDEN_PLUS_HI_EXPR:
+ case VEC_WIDEN_PLUS_LO_EXPR:
+ case VEC_WIDEN_MINUS_HI_EXPR:
+ case VEC_WIDEN_MINUS_LO_EXPR:
case VEC_PERM_EXPR:
case VEC_DUPLICATE_EXPR:
case VEC_SERIES_EXPR:
@@ -5401,6 +5405,8 @@ expand_debug_expr (tree exp)
case WIDEN_MULT_EXPR:
case WIDEN_MULT_PLUS_EXPR:
case WIDEN_MULT_MINUS_EXPR:
+ case WIDEN_PLUS_EXPR:
+ case WIDEN_MINUS_EXPR:
if (SCALAR_INT_MODE_P (GET_MODE (op0))
&& SCALAR_INT_MODE_P (mode))
{
@@ -5413,6 +5419,10 @@ expand_debug_expr (tree exp)
op1 = simplify_gen_unary (ZERO_EXTEND, mode, op1, inner_mode);
else
op1 = simplify_gen_unary (SIGN_EXTEND, mode, op1, inner_mode);
+ if (TREE_CODE (exp) == WIDEN_PLUS_EXPR)
+ return simplify_gen_binary (PLUS, mode, op0, op1);
+ else if (TREE_CODE (exp) == WIDEN_MINUS_EXPR)
+ return simplify_gen_binary (MINUS, mode, op0, op1);
op0 = simplify_gen_binary (MULT, mode, op0, op1);
if (TREE_CODE (exp) == WIDEN_MULT_EXPR)
return op0;
@@ -0,0 +1,41 @@
+// PR debug/108967
+// { dg-do compile }
+
+struct F { unsigned short r[8]; };
+extern void foo (F);
+
+static inline F
+bar (F a, F b)
+{
+ for (int i = 0; i < 8; ++i)
+ a.r[i] = a.r[i] + b.r[i] < (unsigned short) -1 ? a.r[i] + b.r[i] : (unsigned short) -1;
+ return a;
+}
+
+static inline void
+baz (F v)
+{
+ foo (v);
+}
+
+void
+qux (F a, F b)
+{
+ F c = bar (a, b);
+ baz (c);
+}
+
+static inline F
+corge (F a, F b)
+{
+ for (int i = 0; i < 8; ++i)
+ a.r[i] = a.r[i] - b.r[i] > 0 ? a.r[i] - b.r[i] : 0;
+ return a;
+}
+
+void
+garply (F a, F b)
+{
+ F c = corge (a, b);
+ baz (c);
+}