mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
ceafa84ff7
This patch fixes a bug in the AVR FRMIDX expansion logic.
The expansion would leave a leftover operand from the original FRMIDX,
but now attached to a MOVWRdRr instruction. The MOVWRdRr instruction
did not expect this operand and so LLVM rejected the machine
instruction.
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
Tim fixed this so that now the FRMIDX is expanded correctly into
a well-formed MOVWRdRr.
Patch by Tim Neumann
llvm-svn: 346117
49 lines
1.8 KiB
LLVM
49 lines
1.8 KiB
LLVM
; 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)
|
|
|