This fixes functions like
void f (int a1, int a2, int a3, int a4, int a5,...)
In ARMTargetLowering::LowerFormalArguments if the function has 4 or
more regular arguments we used to set VarArgsFrameIndex using an
offset of 0, which is only correct if the function has exactly 4
regular arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85590 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/2009-10-30.ll b/test/CodeGen/ARM/2009-10-30.ll
new file mode 100644
index 0000000..8256386
--- /dev/null
+++ b/test/CodeGen/ARM/2009-10-30.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s -mtriple=arm-linux-gnueabi | FileCheck %s
+; This test checks that the address of the varg arguments is correctly
+; computed when there are 5 or more regular arguments.
+
+define void @f(i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, ...) {
+entry:
+;CHECK: sub sp, sp, #4
+;CHECK: add r0, sp, #8
+;CHECK: str r0, [sp], #+4
+;CHECK: bx lr
+ %ap = alloca i8*, align 4
+ %ap1 = bitcast i8** %ap to i8*
+ call void @llvm.va_start(i8* %ap1)
+ ret void
+}
+
+declare void @llvm.va_start(i8*) nounwind