Fix alignment on alloca's for parameters using ABIArgInfo::Expand.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143658 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index 6e3b70c..92ac5ae 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -1058,10 +1058,11 @@
// If this structure was expanded into multiple arguments then
// we need to create a temporary and reconstruct it from the
// arguments.
- llvm::Value *Temp = CreateMemTemp(Ty, Arg->getName() + ".addr");
- llvm::Function::arg_iterator End =
- ExpandTypeFromArgs(Ty, MakeAddrLValue(Temp, Ty), AI);
- EmitParmDecl(*Arg, Temp, ArgNo);
+ llvm::AllocaInst *Alloca = CreateMemTemp(Ty);
+ Alloca->setAlignment(getContext().getDeclAlign(Arg).getQuantity());
+ LValue LV = MakeAddrLValue(Alloca, Ty, Alloca->getAlignment());
+ llvm::Function::arg_iterator End = ExpandTypeFromArgs(Ty, LV, AI);
+ EmitParmDecl(*Arg, Alloca, ArgNo);
// Name the arguments used in expansion and increment AI.
unsigned Index = 0;
diff --git a/test/CodeGen/align-param.c b/test/CodeGen/align-param.c
index 15a8c2a..8907f66 100644
--- a/test/CodeGen/align-param.c
+++ b/test/CodeGen/align-param.c
@@ -7,3 +7,12 @@
}
// CHECK: define i32 @test
// CHECK: alloca i64, align 8
+
+
+// Make sure we honor the aligned attribute.
+struct X { int x,y,z,a; };
+int test2(struct X x __attribute((aligned(16)))) {
+ return x.z;
+}
+// CHECK: define i32 @test2
+// CHECK: alloca %struct.X, align 16