llvm/test/Transforms/LoopUnswitch/pr32818.ll
Davide Italiano bbc33ba775 [LoopUnswitch] Don't remove instructions with side effects.
This fixes PR32818.

Differential Revision:  https://reviews.llvm.org/D32664

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301722 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-29 00:12:18 +00:00

20 lines
559 B
LLVM

; Check that the call doesn't get removed even if
; it has no uses. It could have side-effects.
; RUN: opt -loop-unswitch -S %s | FileCheck %s
; CHECK-LABEL: @tinky
define i32 @tinkywinky(i8 %patatino) {
%cmp1 = icmp slt i8 %patatino, 5
br label %body
body:
%i = select i1 %cmp1, i8 6, i8 undef
br i1 true, label %body, label %end
end:
%split = phi i8 [ %i, %body ]
%conv4 = sext i8 %split to i32
; CHECK: tail call fastcc i32 @fn5(
%call = tail call fastcc i32 @fn5(i32 %conv4)
ret i32 0
}
declare fastcc i32 @fn5(i32 returned) unnamed_addr