Fix PR5024. LiveVariables::FindLastPartialDef should return a set of sub-registers that were defined by the last partial def, not just a single sub-register.

llvm-svn: 82535

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/2009-09-21-LiveVariablesBug.ll b/llvm/test/CodeGen/ARM/2009-09-21-LiveVariablesBug.ll
new file mode 100644
index 00000000000..aace4751915
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/2009-09-21-LiveVariablesBug.ll
@@ -0,0 +1,14 @@
+; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi -mattr=+neon
+
+; PR5024
+
+%bar = type { <4 x float> }
+%foo = type { %bar, %bar, %bar, %bar }
+
+declare arm_aapcs_vfpcc <4 x float> @bbb(%bar*) nounwind
+
+define arm_aapcs_vfpcc void @aaa(%foo* noalias sret %agg.result, %foo* %tfrm) nounwind {
+entry:
+  %0 = call arm_aapcs_vfpcc  <4 x float> @bbb(%bar* undef) nounwind ; <<4 x float>> [#uses=0]
+  ret void
+}