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| -rw-r--r-- | test/CodeGen/X86/2009-07-22-LinearScanBug.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2009-07-22-LinearScanBug.ll b/test/CodeGen/X86/2009-07-22-LinearScanBug.ll new file mode 100644 index 0000000000..bfb76fe8f5 --- /dev/null +++ b/test/CodeGen/X86/2009-07-22-LinearScanBug.ll @@ -0,0 +1,29 @@ +; RUN: llvm-as < %s | llc -mtriple=i386-pc-mingw32 +; PR4572 + + %"struct.std::valarray<unsigned int>" = type { i32, i32* } + +define void @_ZSt17__gslice_to_indexjRKSt8valarrayIjES2_RS0_(i32 %__o, %"struct.std::valarray<unsigned int>"* nocapture %__l, %"struct.std::valarray<unsigned int>"* nocapture %__s, %"struct.std::valarray<unsigned int>"* nocapture %__i) nounwind { +entry: + %0 = alloca i32, i32 undef, align 4 ; <i32*> [#uses=1] + br i1 undef, label %return, label %bb4 + +bb4: ; preds = %bb7.backedge, %entry + %indvar = phi i32 [ %indvar.next, %bb7.backedge ], [ 0, %entry ] ; <i32> [#uses=2] + %scevgep24.sum = sub i32 undef, %indvar ; <i32> [#uses=2] + %scevgep25 = getelementptr i32* %0, i32 %scevgep24.sum ; <i32*> [#uses=1] + %scevgep27 = getelementptr i32* undef, i32 %scevgep24.sum ; <i32*> [#uses=1] + %1 = load i32* %scevgep27, align 4 ; <i32> [#uses=0] + br i1 undef, label %bb7.backedge, label %bb5 + +bb5: ; preds = %bb4 + store i32 0, i32* %scevgep25, align 4 + br label %bb7.backedge + +bb7.backedge: ; preds = %bb5, %bb4 + %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] + br label %bb4 + +return: ; preds = %entry + ret void +} |