New test. Bogus implicit-def prevented a copy from being coalesced.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40690 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll b/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll
new file mode 100644 (file)
index 0000000..8eda0ab
--- /dev/null
+++ b/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | llc -march=x86 | not grep movl
+
+define i8 @t(i8 zeroext  %x, i8 zeroext  %y) zeroext  {
+       %tmp2 = add i8 %x, 2
+       %tmp4 = add i8 %y, -2
+       %tmp5 = mul i8 %tmp4, %tmp2
+       ret i8 %tmp5
+}