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29 lines
990 B
Diff
29 lines
990 B
Diff
From 881bf715f06201a57a4f1a60155b556fedd556db Mon Sep 17 00:00:00 2001
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From: Victor Mustya <victor.mustya@intel.com>
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Date: Tue, 22 Aug 2023 11:10:30 -0700
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Subject: [PATCH] Don't emit bitreverse or bswap intrinsics of illegal bit
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width during instcombine
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---
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llvm/lib/Transforms/Utils/Local.cpp | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
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index b2ed95b05..476a5c4c1 100644
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--- a/llvm/lib/Transforms/Utils/Local.cpp
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+++ b/llvm/lib/Transforms/Utils/Local.cpp
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@@ -3312,6 +3312,10 @@ bool llvm::recognizeBSwapOrBitReverseIdiom(
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if (DemandedBW > ITy->getScalarSizeInBits())
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return false;
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+ auto &DL = I->getModule()->getDataLayout();
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+ if (DL.isIllegalInteger(DemandedBW))
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+ return false;
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+
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// Now, is the bit permutation correct for a bswap or a bitreverse? We can
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// only byteswap values with an even number of bytes.
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APInt DemandedMask = APInt::getAllOnes(DemandedBW);
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--
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2.43.0
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