Actually test something. Use PR3170 test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60727 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopUnswitch/2008-11-03-Invariant.ll b/test/Transforms/LoopUnswitch/2008-11-03-Invariant.ll
index 3bc57265ce7fd07d1a82e0c0ee778c52853fd031..383aa5b671c78226f13d10f4601a89ed230c112f 100644 (file)
--- a/test/Transforms/LoopUnswitch/2008-11-03-Invariant.ll
+++ b/test/Transforms/LoopUnswitch/2008-11-03-Invariant.ll
@@ -1,47 +1,36 @@
-; RUN: llvm-as < %s | opt -loop-unswitch -verify -disable-output
-
-
-define void @test_fc_while_continue_or(float %x, float %y, float* %result) nounwind {
+; RUN: llvm-as < %s | opt -loop-unswitch -stats -disable-output |& grep "1 loop-unswitch - Number of branches unswitched" | count 1
+; PR 3170
+define i32 @a(i32 %x, i32 %y) nounwind {
 entry:
-       br label %bb2.outer
+       %0 = icmp ult i32 0, %y         ; <i1> [#uses=1]
+       br i1 %0, label %bb.nph, label %bb4
+
+bb.nph:                ; preds = %entry
+       %1 = icmp eq i32 %x, 0          ; <i1> [#uses=1]
+       br label %bb
 
-bb:            ; preds = %bb2
-       %0 = add float %5, %z.0         ; <float> [#uses=3]
-       %1 = fcmp oeq float %0, 0.000000e+00            ; <i1> [#uses=1]
+bb:            ; preds = %bb.nph, %bb3
+       %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ]            ; <i32> [#uses=1]
        br i1 %1, label %bb2, label %bb1
 
 bb1:           ; preds = %bb
-       %.lcssa = phi float [ %0, %bb ]         ; <float> [#uses=1]
-       %z.0.lcssa1 = phi float [ %z.0, %bb ]           ; <float> [#uses=0]
-       %2 = add float %x_addr.0.ph, 1.000000e+00               ; <float> [#uses=1]
-       br label %bb2.outer
-
-bb2.outer:             ; preds = %bb1, %entry
-       %z.0.ph = phi float [ 0.000000e+00, %entry ], [ %.lcssa, %bb1 ]         ; <float> [#uses=1]
-       %x_addr.0.ph = phi float [ %x, %entry ], [ %2, %bb1 ]           ; <float> [#uses=3]
-       %3 = fcmp une float %x_addr.0.ph, 0.000000e+00          ; <i1> [#uses=1]
-       %4 = fcmp une float %y, 0.000000e+00            ; <i1> [#uses=1]
-       %or.cond = or i1 %3, %4         ; <i1> [#uses=1]
-       %5 = mul float %x_addr.0.ph, %y         ; <float> [#uses=1]
+       %2 = tail call i32 (...)* @b() nounwind         ; <i32> [#uses=0]
        br label %bb2
 
-bb2:           ; preds = %bb2.outer, %bb
-       %z.0 = phi float [ %0, %bb ], [ %z.0.ph, %bb2.outer ]           ; <float> [#uses=3]
-       br i1 %or.cond, label %bb, label %bb4
+bb2:           ; preds = %bb, %bb1
+       %3 = add i32 %i.01, 1           ; <i32> [#uses=2]
+       br label %bb3
 
-bb4:           ; preds = %bb2
-       %z.0.lcssa = phi float [ %z.0, %bb2 ]           ; <float> [#uses=1]
-       store float %z.0.lcssa, float* %result, align 4
-       ret void
-}
+bb3:           ; preds = %bb2
+       %i.0 = phi i32 [ %3, %bb2 ]             ; <i32> [#uses=1]
+       %4 = icmp ult i32 %i.0, %y              ; <i1> [#uses=1]
+       br i1 %4, label %bb, label %bb3.bb4_crit_edge
 
-define i32 @main() nounwind {
-entry:
-       %z = alloca [10 x i32]          ; <[10 x i32]*> [#uses=2]
-       %0 = call i32 (...)* @test_fc_while_or(i32 0, i32 0, [10 x i32]* %z) nounwind           ; <i32> [#uses=0]
-       %1 = getelementptr [10 x i32]* %z, i32 0, i32 0         ; <i32*> [#uses=1]
-       %2 = load i32* %1, align 4              ; <i32> [#uses=1]
-       ret i32 %2
+bb3.bb4_crit_edge:             ; preds = %bb3
+       br label %bb4
+
+bb4:           ; preds = %bb3.bb4_crit_edge, %entry
+       ret i32 0
 }
 
-declare i32 @test_fc_while_or(...)
+declare i32 @b(...)