[llvm] r230939 - Teach DataLayout that ABI alignments for non-aggregate types must be non-zero.
Owen Anderson
resistor at mac.com
Mon Mar 2 01:35:00 PST 2015
Author: resistor
Date: Mon Mar 2 03:34:59 2015
New Revision: 230939
URL: http://llvm.org/viewvc/llvm-project?rev=230939&view=rev
Log:
Teach DataLayout that ABI alignments for non-aggregate types must be non-zero.
This manifested as assertions and/or crashes in later phases of optimization,
depending on the build configuration.
Added:
llvm/trunk/test/Assembler/invalid-datalayout22.ll
Modified:
llvm/trunk/lib/IR/DataLayout.cpp
Modified: llvm/trunk/lib/IR/DataLayout.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/DataLayout.cpp?rev=230939&r1=230938&r2=230939&view=diff
==============================================================================
--- llvm/trunk/lib/IR/DataLayout.cpp (original)
+++ llvm/trunk/lib/IR/DataLayout.cpp Mon Mar 2 03:34:59 2015
@@ -312,6 +312,9 @@ void DataLayout::parseSpecifier(StringRe
"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;
Added: llvm/trunk/test/Assembler/invalid-datalayout22.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Assembler/invalid-datalayout22.ll?rev=230939&view=auto
==============================================================================
--- llvm/trunk/test/Assembler/invalid-datalayout22.ll (added)
+++ llvm/trunk/test/Assembler/invalid-datalayout22.ll Mon Mar 2 03:34:59 2015
@@ -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
+
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