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Fix address calculation error from r155744.
This was exposed by SingleSource/UnitTests/Vector/constpool.c. The computed size of a basic block isn't always a multiple of its known alignment, and that can introduce extra alignment padding after the block. <rdar://problem/11347135> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155845 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -124,7 +124,12 @@ namespace {
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/// This number should be used to predict worst case padding when
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/// splitting the block.
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unsigned internalKnownBits() const {
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return Unalign ? Unalign : KnownBits;
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unsigned Bits = Unalign ? Unalign : KnownBits;
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// If the block size isn't a multiple of the known bits, assume the
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// worst case padding.
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if (Size & ((1u << Bits) - 1))
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Bits = CountTrailingZeros_32(Size);
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return Bits;
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}
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/// Compute the offset immediately following this block. If LogAlign is
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