1 files changed, 88 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IndVarSimplify/replace-iv-with-loop-invariant.ll b/llvm/test/Transforms/IndVarSimplify/replace-iv-with-loop-invariant.ll
new file mode 100644
index 00000000000..d3d6d1ed4fa
--- /dev/null
+++ b/llvm/test/Transforms/IndVarSimplify/replace-iv-with-loop-invariant.ll
@@ -0,0 +1,88 @@
+; RUN: opt < %s -indvars -S | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@G = external global i32
+
+define void @test0(i64* %arg) {
+bb:
+  br label %bb2
+
+bb2:
+  %tmp = phi i64* [%arg, %bb ], [ %tmp7, %bb2 ]
+  %tmp4 = call i32* @wobble(i64* nonnull %tmp, i32* null)
+  %tmp5 = load i32, i32* %tmp4, align 8
+  %tmp7 = load i64*, i64** undef, align 8
+  br label %bb2
+}
+
+; CHECK-LABEL: void @test0
+; CHECK:         load i32, i32* null
+
+define void @test1(i64* %arg) {
+bb:
+  br label %bb2
+
+bb2:
+  %tmp = phi i64* [%arg, %bb ], [ %tmp7, %bb2 ]
+  %tmp4 = call i32* @wobble(i64* nonnull %tmp, i32* inttoptr (i64 4 to i32*))
+  %tmp5 = load i32, i32* %tmp4
+  %tmp7 = load i64*, i64** undef, align 8
+  br label %bb2
+}
+
+; CHECK-LABEL: void @test1
+; CHECK:         load i32, i32* inttoptr (i64 4 to i32*)
+
+define void @test2(i64* %arg) {
+bb:
+  br label %bb2
+
+bb2:
+  %tmp = phi i64* [%arg, %bb ], [ %tmp7, %bb2 ]
+  %tmp4 = call i32* @wobble(i64* nonnull %tmp, i32* @G)
+  %tmp5 = load i32, i32* %tmp4
+  %tmp7 = load i64*, i64** undef, align 8
+  br label %bb2
+}
+
+; CHECK-LABEL: void @test2
+; CHECK:         load i32, i32* @G
+
+
+define void @test3(i64* %arg, i32* %loop.invariant) {
+bb:
+  br label %bb2
+
+bb2:
+  %tmp = phi i64* [%arg, %bb ], [ %tmp7, %bb2 ]
+  %tmp4 = call i32* @wobble(i64* nonnull %tmp, i32* %loop.invariant)
+  %tmp5 = load i32, i32* %tmp4
+  %tmp7 = load i64*, i64** undef, align 8
+  br label %bb2
+}
+
+; CHECK-LABEL: void @test3
+; CHECK:         load i32, i32* %loop.invariant
+
+define void @test4(i64* %arg, i32* %loop.invariant, i64 %N) {
+bb:
+  br label %bb2
+
+bb2:
+  %tmp = phi i64* [%arg, %bb ], [ %tmp7, %bb2 ]
+  %mul = mul nsw i64 %N, 64
+  %ptr = getelementptr inbounds i32, i32* %loop.invariant, i64 %mul 
+  %tmp4 = call i32* @wobble(i64* nonnull %tmp, i32* %ptr)
+  %tmp5 = load i32, i32* %tmp4
+  %tmp7 = load i64*, i64** undef, align 8
+  br label %bb2
+}
+
+; CHECK-LABEL: void @test4
+; CHECK:         [[P:%[a-zA-Z$._0-9]+]] = getelementptr i32, i32* %loop.invariant
+; CHECK:         phi
+; CHECK:         load i32, i32* [[P]]
+
+declare i32* @wobble(i64*, i32* returned)