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commit 6f1a7440d9aac59fba0f2e2d8d0a9a0b82f480cb
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Author: acsawdey <acsawdey@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Tue Oct 2 17:31:53 2018 +0000
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2018-10-02 Aaron Sawdey <acsawdey@linux.ibm.com>
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PR target/87474
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* config/rs6000/rs6000-string.c (expand_strn_compare): Check that both
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P8_VECTOR and VSX are enabled.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@264799 138bc75d-0d04-0410-961f-82ee72b054a4
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diff --git a/gcc/config/rs6000/rs6000-string.c b/gcc/config/rs6000/rs6000-string.c
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index ff0414586d0..9c25bad97a1 100644
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--- a/gcc/config/rs6000/rs6000-string.c
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+++ b/gcc/config/rs6000/rs6000-string.c
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@@ -2205,6 +2205,7 @@ emit_final_str_compare_vec (rtx str1, rtx str2, rtx result,
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}
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else
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{
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+ gcc_assert (TARGET_P8_VECTOR);
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rtx diffix = gen_reg_rtx (DImode);
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rtx result_gbbd = gen_reg_rtx (V16QImode);
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/* Since each byte of the input is either 00 or FF, the bytes in
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@@ -2313,9 +2314,12 @@ expand_strn_compare (rtx operands[], int no_length)
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/* Is it OK to use vec/vsx for this. TARGET_VSX means we have at
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least POWER7 but we use TARGET_EFFICIENT_UNALIGNED_VSX which is
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at least POWER8. That way we can rely on overlapping compares to
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- do the final comparison of less than 16 bytes. Also I do not want
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- to deal with making this work for 32 bits. */
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- int use_vec = (bytes >= 16 && !TARGET_32BIT && TARGET_EFFICIENT_UNALIGNED_VSX);
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+ do the final comparison of less than 16 bytes. Also I do not
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+ want to deal with making this work for 32 bits. In addition, we
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+ have to make sure that we have at least P8_VECTOR (we don't allow
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+ P9_VECTOR without P8_VECTOR). */
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+ int use_vec = (bytes >= 16 && !TARGET_32BIT
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+ && TARGET_EFFICIENT_UNALIGNED_VSX && TARGET_P8_VECTOR);
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if (use_vec)
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required_align = 16;
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