diff --git a/test/Transforms/GVN/rle-must-alias.ll b/test/Transforms/GVN/rle-must-alias.ll new file mode 100644 index 00000000000..e507556fe1f --- /dev/null +++ b/test/Transforms/GVN/rle-must-alias.ll @@ -0,0 +1,42 @@ +; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD.rle = phi i32} +; The %7 and %4 loads combine to make %DEAD unneeded. +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin7" +@H = common global [100 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=3] +@G = common global i32 0 ; [#uses=2] + +define i32 @test(i32 %i) nounwind { +entry: + %0 = tail call i32 (...)* @foo() nounwind ; [#uses=1] + %1 = icmp eq i32 %0, 0 ; [#uses=1] + br i1 %1, label %bb1, label %bb + +bb: ; preds = %entry + %2 = tail call i32 (...)* @bar() nounwind ; [#uses=0] + %3 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1] + %4 = load i32* %3, align 4 ; [#uses=1] + store i32 %4, i32* @G, align 4 + br label %bb3 + +bb1: ; preds = %entry + %5 = tail call i32 (...)* @baz() nounwind ; [#uses=0] + %6 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1] + %7 = load i32* %6, align 4 ; [#uses=2] + store i32 %7, i32* @G, align 4 + %8 = icmp eq i32 %7, 0 ; [#uses=1] + br i1 %8, label %bb3, label %bb4 + +bb3: ; preds = %bb1, %bb + %9 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1] + %DEAD = load i32* %9, align 4 ; [#uses=1] + ret i32 %DEAD + +bb4: ; preds = %bb1 + ret i32 0 +} + +declare i32 @foo(...) + +declare i32 @bar(...) + +declare i32 @baz(...)