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[AVR] Add a regression test for struct return lowering

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The test is taken from
https://github.com/avr-rust/rust/issues/57

The originally implementation of struct return lowering was made in
r325474.

Patch by Peter Nimmervoll

llvm-svn: 327967
This commit is contained in:
Dylan McKay 2018-03-20 11:23:03 +00:00
parent 2b389a0814
commit 47c83d47e2
1 changed files with 21 additions and 0 deletions
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21
test/CodeGen/AVR/lower-formal-args-struct-return.ll Normal file
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; RUN: llc < %s -march=avr | FileCheck %s
; This test ensures that the backend can lower returns of struct values.
; It does not check how these are lowered.
;
; In the past, this code used to return an error
;
; Assertion `InVals.size() == Ins.size() && "LowerFormalArguments didn't emit the correct number of values!"' failed.
;
; This feature was first implemented in r325474.
declare i8 @do_something(i8 %val)
; CHECK-LABEL: main
define { i1, i8 } @main(i8) #2 {
entry:
%1 = call zeroext i8 @do_something(i8 zeroext %0)
%2 = insertvalue { i1, i8 } { i1 true, i8 undef }, i8 %1, 1
ret { i1, i8 } %2
}