37 lines
1.4 KiB
Diff
37 lines
1.4 KiB
Diff
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commit 3c3aa1c62767c48ac8f2015df66f04f354dd897b
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Author: Mark Wielaard <mark@klomp.org>
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Date: Tue Oct 17 17:49:26 2017 +0200
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Suppress _dl_runtime_resolve_avx_slow for memcheck conditional.
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glibc ld.so has an optimization when resolving a symbol that checks
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whether or not the upper 128 bits of the ymm registers are zero. If
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so it uses "cheaper" instructions to save/restore them using the xmm
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registers. If those upper 128 bits contain undefined values memcheck
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will issue an Conditional jump or move depends on uninitialised value(s)
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warning whenever trying to resolve a symbol.
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This triggers in our sh-mem-vecxxx test cases. Suppress the warning
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by default.
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diff --git a/glibc-2.X.supp.in b/glibc-2.X.supp.in
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index 8edeb4a..126e8b3 100644
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--- a/glibc-2.X.supp.in
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+++ b/glibc-2.X.supp.in
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@@ -236,3 +236,15 @@
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Memcheck:Cond
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fun:_dl_relocate_object
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}
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+
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+# glibc ld.so has an optimization when resolving a symbol that checks
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+# whether or not the upper 128 bits of the ymm registers are zero. If
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+# so it uses "cheaper" instructions to save/restore them using the xmm
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+# registers. If those upper 128 bits contain undefined values memcheck
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+# will issue an Conditional jump or move depends on uninitialised value(s)
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+# warning whenever trying to resolve a symbol.
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+{
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+ dl-trampoline-sse-avx
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+ Memcheck:Cond
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+ fun:_dl_runtime_resolve_avx_slow
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+}
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