test packed struct codegen on x86

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32367 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/test/CodeGen/X86/packed_struct.ll b/test/CodeGen/X86/packed_struct.ll
new file mode 100644
index 00000000000..d027937b089
--- /dev/null
+++ b/test/CodeGen/X86/packed_struct.ll
@@ -0,0 +1,38 @@
+; RUN: llvm-as < %s | llc -march=x86 |grep "foos+5" &&
+; RUN: llvm-as < %s | llc -march=x86 |grep "foos+1" &&
+; RUN: llvm-as < %s | llc -march=x86 |grep "foos+9" &&
+; RUN: llvm-as < %s | llc -march=x86 |grep "bara+19" &&
+; RUN: llvm-as < %s | llc -march=x86 |grep "bara+4"
+
+; make sure we compute the correct offset for a packed structure
+
+;Note: codegen for this could change rendering the above checks wrong
+
+; ModuleID = 'foo.c'
+target datalayout = "e-p:32:32"
+target endian = little
+target pointersize = 32
+target triple = "i686-pc-linux-gnu"
+	%struct.anon = type <{ sbyte, int, int, int }>
+%foos = external global %struct.anon
+%bara = weak global [4 x <{ int, sbyte }>] zeroinitializer
+
+implementation   ; Functions:
+
+int %foo() {
+entry:
+	%tmp = load int*  getelementptr (%struct.anon* %foos, int 0, uint 1)
+	%tmp3 = load int* getelementptr (%struct.anon* %foos, int 0, uint 2)
+	%tmp6 = load int* getelementptr (%struct.anon* %foos, int 0, uint 3)
+	%tmp4 = add int %tmp3, %tmp
+	%tmp7 = add int %tmp4, %tmp6
+	ret int %tmp7
+}
+
+sbyte %bar() {
+entry:
+	%tmp = load sbyte* getelementptr([4 x <{ int, sbyte }>]* %bara, int 0, int 0, uint 1 )
+	%tmp4 = load sbyte* getelementptr ([4 x <{ int, sbyte }>]* %bara, int 0, int 3, uint 1)
+	%tmp5 = add sbyte %tmp4, %tmp
+	ret sbyte %tmp5
+}