| ; RUN: opt < %s -indvars -S \ |
| ; RUN: | grep "%b.1 = phi i32 [ 2, %bb ], [ 1, %bb2 ]" |
| ; |
| ; This loop has multiple exits, and the value of %b1 depends on which |
| ; exit is taken. Indvars should correctly compute the exit values. |
| ; |
| ; XFAIL: * |
| ; Indvars does not currently replace loop invariant values unless all |
| ; loop exits have the same exit value. We could handle some cases, |
| ; such as this, by making getSCEVAtScope() sensitive to a particular |
| ; loop exit. See PR11388. |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" |
| target triple = "x86_64-pc-linux-gnu" |
| %struct..0anon = type <{ i8, [3 x i8] }> |
| |
| define i32 @main() nounwind { |
| entry: |
| br label %bb2 |
| |
| bb2: ; preds = %bb, %entry |
| %sdata.0 = phi i32 [ 1, %entry ], [ %ins10, %bb ] ; <i32> [#uses=2] |
| %b.0 = phi i32 [ 0, %entry ], [ %t0, %bb ] ; <i32> [#uses=2] |
| %tmp6 = trunc i32 %sdata.0 to i8 ; <i8> [#uses=2] |
| %t2 = and i8 %tmp6, 1 ; <i8> [#uses=1] |
| %t3 = icmp eq i8 %t2, 0 ; <i1> [#uses=1] |
| %t4 = xor i8 %tmp6, 1 ; <i8> [#uses=1] |
| %tmp8 = zext i8 %t4 to i32 ; <i32> [#uses=1] |
| %mask9 = and i32 %sdata.0, -256 ; <i32> [#uses=1] |
| %ins10 = or i32 %tmp8, %mask9 ; <i32> [#uses=1] |
| br i1 %t3, label %bb3, label %bb |
| |
| bb: ; preds = %bb2 |
| %t0 = add i32 %b.0, 1 ; <i32> [#uses=3] |
| %t1 = icmp sgt i32 %t0, 100 ; <i1> [#uses=1] |
| br i1 %t1, label %bb3, label %bb2 |
| |
| bb3: ; preds = %bb, %bb2 |
| %b.1 = phi i32 [ %t0, %bb ], [ %b.0, %bb2 ] ; <i32> [#uses=1] |
| %t5 = icmp eq i32 %b.1, 1 ; <i1> [#uses=1] |
| br i1 %t5, label %bb5, label %bb4 |
| |
| bb4: ; preds = %bb3 |
| tail call void @abort() noreturn nounwind |
| unreachable |
| |
| bb5: ; preds = %bb3 |
| ret i32 0 |
| } |
| |
| declare void @llvm.memset.i64(i8* nocapture, i8, i64, i32) nounwind |
| |
| declare void @abort() noreturn nounwind |
