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22 lines
632 B
LLVM
22 lines
632 B
LLVM
; RUN: opt < %s -S -instcombine | FileCheck %s
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; rdar://problem/9267970
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; ideally this test will run on a 32-bit host
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; must not discard GEPs that might overflow at runtime (aren't inbounds)
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define i32 @main(i32 %argc) {
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entry:
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%tmp1 = add i32 %argc, -2
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%tmp2 = add i32 %argc, 1879048192
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%p = alloca i8
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; CHECK: getelementptr
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%p1 = getelementptr i8, i8* %p, i32 %tmp1
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; CHECK: getelementptr
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%p2 = getelementptr i8, i8* %p, i32 %tmp2
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%cmp = icmp ult i8* %p1, %p2
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br i1 %cmp, label %bbtrue, label %bbfalse
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bbtrue: ; preds = %entry
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ret i32 -1
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bbfalse: ; preds = %entry
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ret i32 0
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}
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