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Teach DataLayout that alignments on basic types must be powers of two.

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Fixes assertion failures/crashes on bad datalayout specifications.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230940 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2015-03-02 09:35:03 +00:00
parent c7292fdabe
commit 8fae2845b1
3 changed files with 16 additions and 0 deletions
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4
lib/IR/DataLayout.cpp
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@@ -405,6 +405,10 @@ DataLayout::setAlignment(AlignTypeEnum align_type, unsigned abi_align,
report_fatal_error("Invalid ABI alignment, must be a 16bit integer");
if (!isUInt<16>(pref_align))
report_fatal_error("Invalid preferred alignment, must be a 16bit integer");
if (abi_align != 0 && !isPowerOf2_64(abi_align))
report_fatal_error("Invalid ABI alignment, must be a power of 2");
if (pref_align != 0 && !isPowerOf2_64(pref_align))
report_fatal_error("Invalid preferred alignment, must be a power of 2");
if (pref_align < abi_align)
report_fatal_error(