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2019-07-04 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/90756
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* explow.c (promote_ssa_mode): Always use TYPE_MODE, don't bypass it
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for VECTOR_TYPE_P.
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--- gcc/explow.c
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+++ gcc/explow.c
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@@ -892,16 +892,7 @@ promote_ssa_mode (const_tree name, int *punsignedp)
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tree type = TREE_TYPE (name);
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int unsignedp = TYPE_UNSIGNED (type);
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- machine_mode mode = TYPE_MODE (type);
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-
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- /* Bypass TYPE_MODE when it maps vector modes to BLKmode. */
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- if (mode == BLKmode)
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- {
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- gcc_assert (VECTOR_TYPE_P (type));
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- mode = type->type_common.mode;
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- }
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-
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- machine_mode pmode = promote_mode (type, mode, &unsignedp);
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+ machine_mode pmode = promote_mode (type, TYPE_MODE (type), &unsignedp);
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if (punsignedp)
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*punsignedp = unsignedp;
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--- /dev/null
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+++ gcc/testsuite/gcc.dg/pr90756.c
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@@ -0,0 +1,26 @@
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+/* PR rtl-optimization/90756 */
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+/* { dg-do compile } */
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+/* { dg-options "-O2 -Wno-psabi" } */
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+/* { dg-additional-options "-mno-sse" { target ia32 } } */
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+
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+typedef float B __attribute__((vector_size(4 * sizeof (float))));
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+typedef unsigned long long C __attribute__((vector_size(4 * sizeof (long long))));
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+typedef short D __attribute__((vector_size(4 * sizeof (short))));
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+B z;
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+void foo (C);
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+C bar (D);
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+B baz ();
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+D qux (B);
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+
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+void
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+quux (int x)
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+{
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+ B n = z, b = z;
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+ while (1)
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+ switch (x)
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+ {
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+ case 0: n = baz (); /* FALLTHRU */
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+ case 1: { B o = n; n = b; b = o; } /* FALLTHRU */
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+ case 2: { D u = qux (b); C v = bar (u); foo (v); }
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+ }
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+}
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