new testcase for PR1296

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35574 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/Generic/phi-immediate-factoring.ll b/test/CodeGen/Generic/phi-immediate-factoring.ll
new file mode 100644 (file)
index 0000000..3d40c8e
--- /dev/null
+++ b/test/CodeGen/Generic/phi-immediate-factoring.ll
@@ -0,0 +1,54 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep 'movl $1' | wc -l | grep 1
+; PR1296
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
+target triple = "i686-apple-darwin8"
+
+define i32 @foo(i32 %A, i32 %B, i32 %C) {
+entry:
+       switch i32 %A, label %out [
+                i32 1, label %bb
+                i32 0, label %bb13
+                i32 2, label %bb35
+       ]
+
+bb:            ; preds = %cond_next, %entry
+       %i.144.1 = phi i32 [ 0, %entry ], [ %tmp7, %cond_next ]         ; <i32> [#uses=2]
+       %tmp4 = and i32 %i.144.1, %B            ; <i32> [#uses=1]
+       icmp eq i32 %tmp4, 0            ; <i1>:0 [#uses=1]
+       br i1 %0, label %cond_next, label %out
+
+cond_next:             ; preds = %bb
+       %tmp7 = add i32 %i.144.1, 1             ; <i32> [#uses=2]
+       icmp slt i32 %tmp7, 1000                ; <i1>:1 [#uses=1]
+       br i1 %1, label %bb, label %out
+
+bb13:          ; preds = %cond_next18, %entry
+       %i.248.1 = phi i32 [ 0, %entry ], [ %tmp20, %cond_next18 ]              ; <i32> [#uses=2]
+       %tmp16 = and i32 %i.248.1, %C           ; <i32> [#uses=1]
+       icmp eq i32 %tmp16, 0           ; <i1>:2 [#uses=1]
+       br i1 %2, label %cond_next18, label %out
+
+cond_next18:           ; preds = %bb13
+       %tmp20 = add i32 %i.248.1, 1            ; <i32> [#uses=2]
+       icmp slt i32 %tmp20, 1000               ; <i1>:3 [#uses=1]
+       br i1 %3, label %bb13, label %out
+
+bb27:          ; preds = %bb35
+       %tmp30 = and i32 %i.3, %C               ; <i32> [#uses=1]
+       icmp eq i32 %tmp30, 0           ; <i1>:4 [#uses=1]
+       br i1 %4, label %cond_next32, label %out
+
+cond_next32:           ; preds = %bb27
+       %indvar.next = add i32 %i.3, 1          ; <i32> [#uses=1]
+       br label %bb35
+
+bb35:          ; preds = %entry, %cond_next32
+       %i.3 = phi i32 [ %indvar.next, %cond_next32 ], [ 0, %entry ]            ; <i32> [#uses=3]
+       icmp slt i32 %i.3, 1000         ; <i1>:5 [#uses=1]
+       br i1 %5, label %bb27, label %out
+
+out:           ; preds = %bb27, %bb35, %bb13, %cond_next18, %bb, %cond_next, %entry
+       %result.0 = phi i32 [ 0, %entry ], [ 1, %bb ], [ 0, %cond_next ], [ 1, %bb13 ], [ 0, %cond_next18 ], [ 1, %bb27 ], [ 0, %bb35 ]         ; <i32> [#uses=1]
+       ret i32 %result.0
+}