new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37251 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/lsr-negative-stride.ll b/test/CodeGen/X86/lsr-negative-stride.ll
new file mode 100644 (file)
index 0000000..5b9711e
--- /dev/null
+++ b/test/CodeGen/X86/lsr-negative-stride.ll
@@ -0,0 +1,37 @@
+; RUN: llvm-as < %s | llc -march=x86 | not grep neg
+; RUN: llvm-as < %s | llc -march=x86 | not grep sub.*esp
+; RUN: llvm-as < %s | llc -march=x86 | not grep esi
+
+define i32 @t(i32 %a, i32 %b) {
+entry:
+       %tmp1434 = icmp eq i32 %a, %b           ; <i1> [#uses=1]
+       br i1 %tmp1434, label %bb17, label %bb.outer
+
+bb.outer:              ; preds = %cond_false, %entry
+       %b_addr.021.0.ph = phi i32 [ %b, %entry ], [ %tmp10, %cond_false ]              ; <i32> [#uses=5]
+       %a_addr.026.0.ph = phi i32 [ %a, %entry ], [ %a_addr.026.0, %cond_false ]               ; <i32> [#uses=1]
+       br label %bb
+
+bb:            ; preds = %cond_true, %bb.outer
+       %indvar = phi i32 [ 0, %bb.outer ], [ %indvar.next, %cond_true ]                ; <i32> [#uses=2]
+       %tmp. = sub i32 0, %b_addr.021.0.ph             ; <i32> [#uses=1]
+       %tmp.40 = mul i32 %indvar, %tmp.                ; <i32> [#uses=1]
+       %a_addr.026.0 = add i32 %tmp.40, %a_addr.026.0.ph               ; <i32> [#uses=6]
+       %tmp3 = icmp sgt i32 %a_addr.026.0, %b_addr.021.0.ph            ; <i1> [#uses=1]
+       br i1 %tmp3, label %cond_true, label %cond_false
+
+cond_true:             ; preds = %bb
+       %tmp7 = sub i32 %a_addr.026.0, %b_addr.021.0.ph         ; <i32> [#uses=2]
+       %tmp1437 = icmp eq i32 %tmp7, %b_addr.021.0.ph          ; <i1> [#uses=1]
+       %indvar.next = add i32 %indvar, 1               ; <i32> [#uses=1]
+       br i1 %tmp1437, label %bb17, label %bb
+
+cond_false:            ; preds = %bb
+       %tmp10 = sub i32 %b_addr.021.0.ph, %a_addr.026.0                ; <i32> [#uses=2]
+       %tmp14 = icmp eq i32 %a_addr.026.0, %tmp10              ; <i1> [#uses=1]
+       br i1 %tmp14, label %bb17, label %bb.outer
+
+bb17:          ; preds = %cond_false, %cond_true, %entry
+       %a_addr.026.1 = phi i32 [ %a, %entry ], [ %tmp7, %cond_true ], [ %a_addr.026.0, %cond_false ]           ; <i32> [#uses=1]
+       ret i32 %a_addr.026.1
+}