| ; RUN: llc < %s -march=avr | FileCheck %s |
| |
| ; The avr-rust bug can be found here: |
| ; https://github.com/avr-rust/rust/issues/112 |
| ; |
| ; In this test, the codegen stage generates a FRMIDX |
| ; instruction. Later in the pipeline, the frame index |
| ; gets expanded into a 16-bit MOVWRdRr instruction. |
| ; |
| ; There was a bug in the FRMIDX->MOVWRdRr expansion logic |
| ; that could leave the MOVW instruction with an extraneous |
| ; operand, left over from the original FRMIDX. |
| ; |
| ; This would trigger an assertion: |
| ; |
| ; Assertion failed: ((isImpReg || Op.isRegMask() || MCID->isVariadic() || |
| ; OpNo < MCID->getNumOperands() || isMetaDataOp) && |
| ; "Trying to add an operand to a machine instr that is already done!"), |
| ; function addOperand, file llvm/lib/CodeGen/MachineInstr.cpp |
| ; |
| ; The logic has since been fixed. |
| |
| ; CHECK-LABEL: "core::str::slice_error_fail" |
| define void @"core::str::slice_error_fail"(i16 %arg) personality i32 (...) addrspace(1)* @rust_eh_personality { |
| start: |
| %char_range = alloca { i16, i16 }, align 1 |
| br i1 undef, label %"<core::option::Option<T>>::unwrap.exit.thread", label %bb11.i.i |
| |
| "<core::option::Option<T>>::unwrap.exit.thread": |
| br label %"core::char::methods::<impl char>::len_utf8.exit" |
| |
| bb11.i.i: |
| %tmp = bitcast { i16, i16 }* %char_range to i8* |
| %tmp1 = icmp ult i32 undef, 65536 |
| %..i = select i1 %tmp1, i16 3, i16 4 |
| br label %"core::char::methods::<impl char>::len_utf8.exit" |
| |
| "core::char::methods::<impl char>::len_utf8.exit": |
| %tmp2 = phi i8* [ %tmp, %bb11.i.i ], [ undef, %"<core::option::Option<T>>::unwrap.exit.thread" ] |
| %_0.0.i12 = phi i16 [ %..i, %bb11.i.i ], [ 1, %"<core::option::Option<T>>::unwrap.exit.thread" ] |
| %tmp3 = add i16 %_0.0.i12, %arg |
| store i16 %tmp3, i16* undef, align 1 |
| store i8* %tmp2, i8** undef, align 1 |
| unreachable |
| } |
| |
| declare i32 @rust_eh_personality(...) addrspace(1) |
| |