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2016-02-26 Jakub Jelinek <jakub@redhat.com>
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Eric Botcazou <ebotcazou@adacore.com>
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PR rtl-optimization/69891
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* dse.c (scan_insn): If we can't figure out memset arguments
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or they are non-constant, call clear_rhs_from_active_local_stores.
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--- gcc/testsuite/gcc.target/i386/pr69891.c (nonexistent)
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+++ gcc/testsuite/gcc.target/i386/pr69891.c (revision 238137)
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@@ -0,0 +1,30 @@
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+/* PR rtl-optimization/69891 */
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+/* { dg-do run } */
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+/* { dg-options "-O -fno-tree-fre -mstringop-strategy=libcall -Wno-psabi" } */
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+/* { dg-additional-options "-mno-sse" { target ia32 } } */
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+
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+typedef unsigned short A;
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+typedef unsigned short B __attribute__ ((vector_size (32)));
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+typedef unsigned int C;
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+typedef unsigned int D __attribute__ ((vector_size (32)));
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+typedef unsigned long long E;
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+typedef unsigned long long F __attribute__ ((vector_size (32)));
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+
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+__attribute__((noinline, noclone)) unsigned
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+foo(D a, B b, D c, F d)
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+{
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+ b /= (B) {1, -c[0]} | 1;
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+ c[0] |= 7;
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+ a %= c | 1;
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+ c ^= c;
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+ return a[0] + b[15] + c[0] + d[3];
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+}
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+
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+int
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+main ()
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+{
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+ unsigned x = foo ((D) {}, (B) {}, (D) {}, (F) {});
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+ if (x != 0)
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+ __builtin_abort ();
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+ return 0;
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+}
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--- gcc/dse.c (revision 238136)
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+++ gcc/dse.c (revision 238137)
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@@ -2582,6 +2582,8 @@
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active_local_stores = insn_info;
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}
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}
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+ else
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+ clear_rhs_from_active_local_stores ();
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}
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}
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