[ARM] Add a test case for revision 243956.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246785 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/legalize-unaligned-load.ll b/test/CodeGen/ARM/legalize-unaligned-load.ll
new file mode 100644 (file)
index 0000000..fa5b21a
--- /dev/null
+++ b/test/CodeGen/ARM/legalize-unaligned-load.ll
@@ -0,0 +1,35 @@
+; RUN:  llc -O3 -code-model=default -relocation-model=default -mtriple=armv7l-unknown-linux-gnueabihf -mcpu=generic %s -o - | FileCheck %s
+; Check that we respect the existing chain between loads and stores when we
+; legalize unaligned loads.
+; Test case from PR24669.
+
+; Make sure the loads happen before the stores.
+; CHECK-LABEL: get_set_complex:
+; CHECK-NOT: str
+; CHECK: ldr
+; CHECK-NOT: str
+; CHECK: ldr
+; CHECK: str
+; CHECK: bx
+define i32 @get_set_complex({ float, float }* noalias nocapture %retptr,
+                            { i8*, i32 }** noalias nocapture readnone %excinfo,
+                            i8* noalias nocapture readnone %env,
+                            [38 x i8]* nocapture %arg.rec,
+                            float %arg.val.0, float %arg.val.1)
+{
+entry:
+  %inserted.real = insertvalue { float, float } undef, float %arg.val.0, 0
+  %inserted.imag = insertvalue { float, float } %inserted.real, float %arg.val.1, 1
+  %.15 = getelementptr inbounds [38 x i8], [38 x i8]* %arg.rec, i32 0, i32 10
+  %.16 = bitcast i8* %.15 to { float, float }*
+  %.17 = bitcast i8* %.15 to float*
+  %.18 = load float, float* %.17, align 1
+  %.19 = getelementptr inbounds [38 x i8], [38 x i8]* %arg.rec, i32 0, i32 14
+  %tmp = bitcast i8* %.19 to float*
+  %.20 = load float, float* %tmp, align 1
+  %inserted.real.1 = insertvalue { float, float } undef, float %.18, 0
+  %inserted.imag.1 = insertvalue { float, float } %inserted.real.1, float %.20, 1
+  store { float, float } %inserted.imag, { float, float }* %.16, align 1
+  store { float, float } %inserted.imag.1, { float, float }* %retptr, align 4
+  ret i32 0
+}