Teach DataLayout that pointer ABI and preferred alignments are required to be powers of two.
Previously this resulted in asserts and/or crashes (depending on build configuration) at various phases in the optimizer.
llvm-svn: 230938
diff --git a/llvm/lib/IR/DataLayout.cpp b/llvm/lib/IR/DataLayout.cpp
index c414e80..4eb6d78 100644
--- a/llvm/lib/IR/DataLayout.cpp
+++ b/llvm/lib/IR/DataLayout.cpp
@@ -268,12 +268,18 @@
"Missing alignment specification for pointer in datalayout string");
Split = split(Rest, ':');
unsigned PointerABIAlign = inBytes(getInt(Tok));
+ if (!isPowerOf2_64(PointerABIAlign))
+ report_fatal_error(
+ "Pointer ABI alignment must be a power of 2");
// Preferred alignment.
unsigned PointerPrefAlign = PointerABIAlign;
if (!Rest.empty()) {
Split = split(Rest, ':');
PointerPrefAlign = inBytes(getInt(Tok));
+ if (!isPowerOf2_64(PointerPrefAlign))
+ report_fatal_error(
+ "Pointer preferred alignment must be a power of 2");
}
setPointerAlignment(AddrSpace, PointerABIAlign, PointerPrefAlign,