[InstCombine] add test for wrong icmp constant (PR27792)
The code fix for this was checked in at r269797. llvm-svn: 269803
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@ -2097,3 +2097,15 @@ if.then3: ; preds = %if.end
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return: ; preds = %if.end, %entry, %if.then3
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ret void
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}
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; When canonicalizing to 'sgt', make sure the constant is correct.
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define i1 @PR27792(i128 %a) {
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; CHECK-LABEL: @PR27792(
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i128 %a, -1
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%cmp = icmp sge i128 %a, 0
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ret i1 %cmp
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}
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