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