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; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-atomic-cfg-tidy=0 | FileCheck %s
;CHECK-LABEL: foo:
;CHECK: movs r0, #0
;CHECK-NEXT: bx lr
; Note: This test case originally checked, per r167963, for:
; adds
; adc
; bx
; But SDAG now, like InstCombine, can fold everything away.
;rdar://12028498
define i32 @foo() nounwind ssp {
entry:
%tmp2 = zext i32 3 to i64
br label %bug_block
bug_block:
%tmp410 = and i64 1031, 1647010
%tmp411 = and i64 %tmp2, -211
%tmp412 = shl i64 %tmp410, %tmp2
%tmp413 = shl i64 %tmp411, %tmp2
%tmp415 = and i64 %tmp413, 1
%tmp420 = xor i64 0, %tmp415
%tmp421 = and i64 %tmp412, %tmp415
%tmp422 = shl i64 %tmp421, 1
br label %finish
finish:
%tmp423 = lshr i64 %tmp422, 32
%tmp424 = trunc i64 %tmp423 to i32
ret i32 %tmp424
}
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