| ; RUN: opt -hexagon-loop-idiom -loop-deletion -gvn -S < %s |
| ; REQUIRES: asserts |
| |
| ; This tests that the HexagonLoopIdiom pass does not mark LCSSA information |
| ; as preserved. The pass calls SimplifyInstruction is a couple of places, |
| ; which can invalidate LCSSA. Specifically, the uses of a LCSSA phi variable |
| ; are replaced by the incoming value. |
| |
| define hidden void @test() local_unnamed_addr #0 { |
| entry: |
| br label %if.then63 |
| |
| if.then63: |
| br i1 undef, label %do.body311, label %if.end375 |
| |
| do.body311: |
| br i1 undef, label %do.end318, label %do.body311 |
| |
| do.end318: |
| br i1 undef, label %if.end322, label %if.end375 |
| |
| if.end322: |
| %sub325 = sub i32 undef, undef |
| br i1 undef, label %do.end329, label %do.body311 |
| |
| do.end329: |
| %sub325.lcssa = phi i32 [ %sub325, %if.end322 ] |
| br label %do.body330 |
| |
| do.body330: |
| %row_width.7 = phi i32 [ %sub325.lcssa, %do.end329 ], [ %dec334, %do.body330 ] |
| %sp.5 = phi i8* [ undef, %do.end329 ], [ %incdec.ptr331, %do.body330 ] |
| %dp.addr.5 = phi i8* [ undef, %do.end329 ], [ %incdec.ptr332, %do.body330 ] |
| %0 = load i8, i8* %sp.5, align 1 |
| store i8 %0, i8* %dp.addr.5, align 1 |
| %incdec.ptr332 = getelementptr inbounds i8, i8* %dp.addr.5, i32 1 |
| %incdec.ptr331 = getelementptr inbounds i8, i8* %sp.5, i32 1 |
| %dec334 = add i32 %row_width.7, -1 |
| %cmp335 = icmp eq i32 %dec334, 0 |
| br i1 %cmp335, label %if.end375, label %do.body330 |
| |
| if.end375: |
| ret void |
| } |
| |
| attributes #0 = { nounwind } |