diff options
Diffstat (limited to 'test/Transforms/InstCombine/2011-05-13-InBoundsGEP.ll')
| -rw-r--r-- | test/Transforms/InstCombine/2011-05-13-InBoundsGEP.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2011-05-13-InBoundsGEP.ll b/test/Transforms/InstCombine/2011-05-13-InBoundsGEP.ll new file mode 100644 index 0000000..fba7239 --- /dev/null +++ b/test/Transforms/InstCombine/2011-05-13-InBoundsGEP.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -S -instcombine | FileCheck %s +; rdar://problem/9267970 +; ideally this test will run on a 32-bit host +; must not discard GEPs that might overflow at runtime (aren't inbounds) + +define i32 @main(i32 %argc) { +entry: + %tmp1 = add i32 %argc, -2 + %tmp2 = add i32 %argc, 1879048192 + %p = alloca i8 +; CHECK: getelementptr + %p1 = getelementptr i8* %p, i32 %tmp1 +; CHECK: getelementptr + %p2 = getelementptr i8* %p, i32 %tmp2 + %cmp = icmp ult i8* %p1, %p2 + br i1 %cmp, label %bbtrue, label %bbfalse +bbtrue: ; preds = %entry + ret i32 -1 +bbfalse: ; preds = %entry + ret i32 0 +} |
