diff options
Diffstat (limited to 'test/Transforms/IndVarSimplify/phi-uses-value-multiple-times.ll')
| -rw-r--r-- | test/Transforms/IndVarSimplify/phi-uses-value-multiple-times.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/phi-uses-value-multiple-times.ll b/test/Transforms/IndVarSimplify/phi-uses-value-multiple-times.ll new file mode 100644 index 0000000000..dc36b99482 --- /dev/null +++ b/test/Transforms/IndVarSimplify/phi-uses-value-multiple-times.ll @@ -0,0 +1,38 @@ +; REQUIRES: asserts +; RUN: opt < %s -indvars -disable-output -stats -info-output-file - | FileCheck %s +; Check that IndVarSimplify is not creating unnecessary canonical IVs +; that will never be used. +; CHECK-NOT: indvars + +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" + +@ue = external global i64 + +define i32 @foo() nounwind { +entry: + br label %bb38.i + +bb14.i27: + %t0 = load i64* @ue, align 8 + %t1 = sub i64 %t0, %i.0.i35 + %t2 = add i64 %t1, 1 + br i1 undef, label %bb15.i28, label %bb19.i31 + +bb15.i28: + br label %bb19.i31 + +bb19.i31: + %y.0.i = phi i64 [ %t2, %bb15.i28 ], [ %t2, %bb14.i27 ] + br label %bb35.i + +bb35.i: + br i1 undef, label %bb37.i, label %bb14.i27 + +bb37.i: + %t3 = add i64 %i.0.i35, 1 + br label %bb38.i + +bb38.i: + %i.0.i35 = phi i64 [ 1, %entry ], [ %t3, %bb37.i ] + br label %bb35.i +} |