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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AVR/impossible-reg-to-reg-copy.ll
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28 lines
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LLVM

; RUN: llc < %s -mtriple=avr | FileCheck %s
; Test case for an assertion error.
;
; Error:
; ```
; Impossible reg-to-reg copy
; UNREACHABLE executed at lib/Target/AVR/AVRInstrInfo.cpp
; ```
;
; This no longer occurs.
declare { i16, i1 } @llvm.umul.with.overflow.i16(i16, i16)
; CHECK-LABEL: foo
define void @foo() {
entry-block:
%0 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 undef, i16 undef)
%1 = extractvalue { i16, i1 } %0, 1
%2 = icmp eq i1 %1, true
br i1 %2, label %cond, label %next
next: ; preds = %entry-block
ret void
cond: ; preds = %entry-block
unreachable
}