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Fix an abort on a store of an empty struct member. getValue returns

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null in the case of an empty struct, so don't try to call getNumValues
on it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81180 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-09-08 01:44:02 +00:00
parent 49072473ba
commit ed48caf5e7
2 changed files with 18 additions and 0 deletions
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4
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
View File

@ -861,6 +861,10 @@ SDValue SelectionDAGLowering::getValue(const Value *V) {
for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end();
OI != OE; ++OI) {
SDNode *Val = getValue(*OI).getNode();
// If the operand is an empty aggregate, there are no values.
if (!Val) continue;
// Add each leaf value from the operand to the Constants list
// to form a flattened list of all the values.
for (unsigned i = 0, e = Val->getNumValues(); i != e; ++i)
Constants.push_back(SDValue(Val, i));
}

14
test/CodeGen/X86/store-empty-member.ll Normal file
View File

@ -0,0 +1,14 @@
; RUN: llvm-as < %s | llc -march=x86 | FileCheck %s
; Don't crash on an empty struct member.
; CHECK: movl $2, 4(%esp)
; CHECK: movl $1, (%esp)
%testType = type {i32, [0 x i32], i32}
define void @foo() nounwind {
%1 = alloca %testType
volatile store %testType {i32 1, [0 x i32] zeroinitializer, i32 2}, %testType* %1
ret void
}