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