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38 lines
909 B
LLVM
38 lines
909 B
LLVM
; Test that ComputeNumSignBitsForTargetNode() (SELECT_CCMASK) will help
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; DAGCombiner so that it knows that %sel0 is already sign extended.
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;
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; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -debug-only=isel < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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%0 = type <{ %1*, i16, [6 x i8] }>
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%1 = type { i32 (...)** }
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define signext i16 @fun(%0* %Arg0, i16 signext %Arg1) {
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entry:
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br i1 undef, label %lab0, label %lab1
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lab0:
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%icmp0 = icmp eq i32 undef, 0
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%sel0 = select i1 %icmp0, i16 %Arg1, i16 1
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br label %lab1
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lab1:
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; CHECK: *** MachineFunction at end of ISel ***
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; CHECK-LABEL: bb.2.lab1:
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; CHECK-NOT: LHR
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; CHECK: BRC
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%phi0 = phi i16 [ 2, %entry ], [ %sel0, %lab0 ]
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%sext0 = sext i16 %phi0 to i32
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br i1 undef, label %lab2, label %lab3
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lab2:
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%and0 = and i32 %sext0, 8
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%icmp1 = icmp eq i32 %and0, 0
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%sel1 = select i1 %icmp1, i16 %phi0, i16 4
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ret i16 %sel1
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lab3:
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ret i16 8
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}
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