Blame SOURCES/gcc8-pr90139.patch
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2019-04-19 Jakub Jelinek <jakub@redhat.com>
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PR middle-end/90139
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* tree-outof-ssa.c (get_temp_reg): If reg_mode is BLKmode, return
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assign_temp instead of gen_reg_rtx.
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--- /dev/null
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+++ gcc/testsuite/gcc.c-torture/compile/pr90139.c
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@@ -0,0 +1,20 @@
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+/* PR middle-end/90139 */
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+
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+typedef float __attribute__((vector_size (sizeof (float)))) V;
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+void bar (int, V *);
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+int l;
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+
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+void
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+foo (void)
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+{
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+ V n, b, o;
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+ while (1)
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+ switch (l)
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+ {
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+ case 0:
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+ o = n;
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+ n = b;
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+ b = o;
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+ bar (1, &o);
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+ }
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+}
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--- gcc/tree-outof-ssa.c
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+++ gcc/tree-outof-ssa.c
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@@ -653,6 +653,8 @@ get_temp_reg (tree name)
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tree type = TREE_TYPE (name);
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int unsignedp;
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machine_mode reg_mode = promote_ssa_mode (name, &unsignedp);
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+ if (reg_mode == BLKmode)
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+ return assign_temp (type, 0, 0);
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rtx x = gen_reg_rtx (reg_mode);
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if (POINTER_TYPE_P (type))
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mark_reg_pointer (x, TYPE_ALIGN (TREE_TYPE (type)));
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