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2016-12-13 Michael Meissner <meissner@linux.vnet.ibm.com>
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Backport from mainline
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2016-12-07 Michael Meissner <meissner@linux.vnet.ibm.com>
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PR target/72717
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* config/rs6000/rs6000.c (rs6000_expand_vector_init): If the
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V2DImode elements are SUBREG's convert the result into DImode
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rather than failing in emit_move_insn.
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--- gcc/testsuite/gcc.target/powerpc/pr72717.c (nonexistent)
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+++ gcc/testsuite/gcc.target/powerpc/pr72717.c (revision 243626)
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@@ -0,0 +1,18 @@
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+/* { dg-do compile { target { powerpc*-*-* && lp64 } } } */
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+/* { dg-skip-if "" { powerpc*-*-darwin* } { "*" } { "" } } */
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+/* { dg-require-effective-target powerpc_p8vector_ok } */
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+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
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+/* { dg-options "-mcpu=power8 -O2" } */
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+
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+typedef long V __attribute__((__vector_size__(32)));
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+
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+extern void foo (V *, V*);
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+
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+/* This test generated an failure in emit_move_insn. */
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+
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+void
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+foo(V *p, V *q)
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+{
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+ V v = *q;
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+ *p = v << v[0];
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+}
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--- gcc/config/rs6000/rs6000.c (revision 243625)
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+++ gcc/config/rs6000/rs6000.c (revision 243626)
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@@ -6667,25 +6667,43 @@
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/* Double word values on VSX can use xxpermdi or lxvdsx. */
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if (VECTOR_MEM_VSX_P (mode) && (mode == V2DFmode || mode == V2DImode))
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{
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- rtx op0 = XVECEXP (vals, 0, 0);
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- rtx op1 = XVECEXP (vals, 0, 1);
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+ rtx op[2];
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+ size_t i;
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+ size_t num_elements = (all_same) ? 1 : 2;
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+ for (i = 0; i < num_elements; i++)
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+ {
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+ op[i] = XVECEXP (vals, 0, i);
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+ /* Just in case there is a SUBREG with a smaller mode, do a
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+ conversion. */
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+ if (GET_MODE (op[i]) != inner_mode)
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+ {
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+ rtx tmp = gen_reg_rtx (inner_mode);
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+ convert_move (tmp, op[i], 0);
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+ op[i] = tmp;
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+ }
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+ /* Allow load with splat double word. */
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+ else if (MEM_P (op[i]))
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+ {
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+ if (!all_same)
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+ op[i] = force_reg (inner_mode, op[i]);
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+ }
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+ else if (!REG_P (op[i]))
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+ op[i] = force_reg (inner_mode, op[i]);
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+ }
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+
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if (all_same)
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{
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- if (!MEM_P (op0) && !REG_P (op0))
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- op0 = force_reg (inner_mode, op0);
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if (mode == V2DFmode)
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- emit_insn (gen_vsx_splat_v2df (target, op0));
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+ emit_insn (gen_vsx_splat_v2df (target, op[0]));
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else
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- emit_insn (gen_vsx_splat_v2di (target, op0));
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+ emit_insn (gen_vsx_splat_v2di (target, op[0]));
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}
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else
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{
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- op0 = force_reg (inner_mode, op0);
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- op1 = force_reg (inner_mode, op1);
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if (mode == V2DFmode)
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- emit_insn (gen_vsx_concat_v2df (target, op0, op1));
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+ emit_insn (gen_vsx_concat_v2df (target, op[0], op[1]));
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else
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- emit_insn (gen_vsx_concat_v2di (target, op0, op1));
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+ emit_insn (gen_vsx_concat_v2di (target, op[0], op[1]));
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}
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return;
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}
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