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36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep getelementptr
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; PR2831
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; Don't raise arbitrary inttoptr+arithmetic+ptrtoint to getelementptr.
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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-f80:32:32"
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define i32 @main(i32 %argc, i8** %argv) nounwind {
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entry:
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%0 = ptrtoint i8** %argv to i32 ; <i32> [#uses=1]
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%1 = add i32 %0, 1 ; <i32> [#uses=1]
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ret i32 %1
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}
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; This testcase could theoretically be optimized down to return zero,
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; but for now being conservative with ptrtoint/inttoptr is fine.
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define i32 @a() nounwind {
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entry:
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%b = alloca i32 ; <i32*> [#uses=3]
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%a = alloca i32 ; <i32*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store i32 1, i32* %b, align 4
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%a1 = ptrtoint i32* %a to i32 ; <i32> [#uses=1]
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%b4 = ptrtoint i32* %b to i32 ; <i32> [#uses=1]
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%a7 = ptrtoint i32* %a to i32 ; <i32> [#uses=1]
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%0 = sub i32 %b4, %a7 ; <i32> [#uses=1]
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%1 = add i32 %a1, %0 ; <i32> [#uses=1]
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%2 = inttoptr i32 %1 to i32* ; <i32*> [#uses=1]
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store i32 0, i32* %2, align 4
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%3 = load i32* %b, align 4 ; <i32> [#uses=1]
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br label %return
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return: ; preds = %entry
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ret i32 %3
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}
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