New LSR test case.

llvm-svn: 32029

llvm/test/Regression/CodeGen/X86/loop-strength-reduce2.ll

@@ -0,0 +1,29 @@
+; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -relocation-model=pic | not grep lea
+;
+; Make sure the PIC label flags2-"L1$pb" is not moved up to the preheader.
+
+%flags2 = internal global [8193 x sbyte] zeroinitializer, align 32
+
+void %test(int %k, int %i) {
+entry:
+	%i = bitcast int %i to uint
+	%k_addr.012 = shl int %i, ubyte 1
+	%tmp14 = setgt int %k_addr.012, 8192
+	br bool %tmp14, label %return, label %bb
+
+bb:
+	%indvar = phi uint [ 0, %entry ], [ %indvar.next, %bb ]
+	%tmp. = shl uint %i, ubyte 1
+	%tmp.15 = mul uint %indvar, %i
+	%tmp.16 = add uint %tmp.15, %tmp.
+	%k_addr.0.0 = bitcast uint %tmp.16 to int
+	%tmp = getelementptr [8193 x sbyte]* %flags2, int 0, uint %tmp.16
+	store sbyte 0, sbyte* %tmp
+	%k_addr.0 = add int %k_addr.0.0, %i
+	%tmp = setgt int %k_addr.0, 8192
+	%indvar.next = add uint %indvar, 1
+	br bool %tmp, label %return, label %bb
+
+return:
+	ret void
+}