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Teach DataLayout that ABI alignments for non-aggregate types must be non-zero.

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This manifested as assertions and/or crashes in later phases of optimization,
depending on the build configuration.

llvm-svn: 230939
This commit is contained in:
Owen Anderson 2015-03-02 09:34:59 +00:00
parent 9691e92c81
commit f1ccd9db94
2 changed files with 9 additions and 0 deletions
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3
lib/IR/DataLayout.cpp
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@ -312,6 +312,9 @@ void DataLayout::parseSpecifier(StringRef Desc) {
"Missing alignment specification in datalayout string");
Split = split(Rest, ':');
unsigned ABIAlign = inBytes(getInt(Tok));
if (AlignType != AGGREGATE_ALIGN && !ABIAlign)
report_fatal_error(
"ABI alignment specification must be >0 for non-aggregate types");
// Preferred alignment.
unsigned PrefAlign = ABIAlign;

6
test/Assembler/invalid-datalayout22.ll Normal file
View File

@ -0,0 +1,6 @@
; RUN: not llvm-as < %s 2>&1 | FileCheck %s
target datalayout = "v128:0:128"
; CHECK: ABI alignment specification must be >0 for non-aggregate types