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; RUN: llc -O2 -arm-atomic-cfg-tidy=0 -o - %s | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv8-unknown-linux-gnueabihf"
; This is a tricky test case.
; The point of it is to create a diamond where both the true block and the
; false block clobber the predicate when viewed as a whole, but only one of them
; clobbers the predicate when considering the instructions they share.
; Function Attrs: nounwind
define void @BN_kronecker(i1 %a, i32 %b) #0 {
entry:
br label %while.cond38
while.cond38: ; preds = %if.end111, %entry
%cmp79 = icmp eq i32 0, 0
br i1 %a, label %cond.true77, label %cond.false87
; CHECK: %cond.true77
; CHECK-NEXT: @ in Loop
; CHECK-NEXT: cmp.w {{r[0-9]+}}, #0
; CHECK-NEXT: it eq
; CHECK-NEXT: ldreq
; CHECK-NEXT: it ne
; N.b. 16-bit mov instruction in IT block does not set flags.
; CHECK-NEXT: movne
; CHECK-NEXT: mvns
; CHECK-NEXT: b
cond.true77: ; preds = %while.cond38
br i1 %cmp79, label %cond.end84, label %cond.false81
cond.false81: ; preds = %cond.true77
%0 = load i32, i32* null, align 4
br label %cond.end84
cond.end84: ; preds = %cond.false81, %cond.true77
%cond85 = phi i32 [ %0, %cond.false81 ], [ 0, %cond.true77 ]
%neg86 = xor i32 %cond85, -1
br label %cond.false101
cond.false87: ; preds = %while.cond38
br i1 %cmp79, label %cond.false101, label %cond.false91
cond.false91: ; preds = %cond.false87
br label %cond.false101
cond.false101: ; preds = %cond.false91, %cond.false87, %cond.end84
%cond97 = phi i32 [ %neg86, %cond.end84 ], [ %b, %cond.false91 ], [ 0, %cond.false87 ]
%1 = load i32, i32* null, align 4
%and106 = and i32 %cond97, %1
%and107 = and i32 %and106, 2
%tobool108 = icmp ne i32 %and107, 0
br i1 %tobool108, label %if.then109, label %if.end111
if.then109: ; preds = %cond.false101
store i32 0, i32* undef, align 4
br label %if.end111
if.end111: ; preds = %if.then109, %cond.false101
%tobool113 = icmp ne i32 0, 0
br i1 %tobool113, label %while.cond38, label %end
end: ; preds = %if.end111
ret void
}
attributes #0 = { nounwind }
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