1 files changed, 55 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/assume-redundant.ll b/test/Transforms/InstCombine/assume-redundant.ll
new file mode 100644
index 0000000..81fe094
--- /dev/null
+++ b/test/Transforms/InstCombine/assume-redundant.ll
@@ -0,0 +1,55 @@
+; RUN: opt -domtree -instcombine -loops -S < %s | FileCheck %s
+; Note: The -loops above can be anything that requires the domtree, and is
+; necessary to work around a pass-manager bug.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.s = type { double* }
+
+; Function Attrs: nounwind uwtable
+define void @_Z3fooR1s(%struct.s* nocapture readonly dereferenceable(8) %x) #0 {
+
+; CHECK-LABEL: @_Z3fooR1s
+; CHECK: call void @llvm.assume
+; CHECK-NOT: call void @llvm.assume
+
+entry:
+  %a = getelementptr inbounds %struct.s* %x, i64 0, i32 0
+  %0 = load double** %a, align 8
+  %ptrint = ptrtoint double* %0 to i64
+  %maskedptr = and i64 %ptrint, 31
+  %maskcond = icmp eq i64 %maskedptr, 0
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ]
+  tail call void @llvm.assume(i1 %maskcond)
+  %arrayidx = getelementptr inbounds double* %0, i64 %indvars.iv
+  %1 = load double* %arrayidx, align 16
+  %add = fadd double %1, 1.000000e+00
+  tail call void @llvm.assume(i1 %maskcond)
+  %mul = fmul double %add, 2.000000e+00
+  store double %mul, double* %arrayidx, align 16
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  tail call void @llvm.assume(i1 %maskcond)
+  %arrayidx.1 = getelementptr inbounds double* %0, i64 %indvars.iv.next
+  %2 = load double* %arrayidx.1, align 8
+  %add.1 = fadd double %2, 1.000000e+00
+  tail call void @llvm.assume(i1 %maskcond)
+  %mul.1 = fmul double %add.1, 2.000000e+00
+  store double %mul.1, double* %arrayidx.1, align 8
+  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
+  %exitcond.1 = icmp eq i64 %indvars.iv.next, 1599
+  br i1 %exitcond.1, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body
+  ret void
+}
+
+; Function Attrs: nounwind
+declare void @llvm.assume(i1) #1
+
+attributes #0 = { nounwind uwtable }
+attributes #1 = { nounwind }
+