derek.holloway
7502bf64a4
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34 lines
1019 B
LLVM
34 lines
1019 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
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; Test that we recognize that an 'and' instruction that feeds a comparison
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; to zero can be simplifed by using the record form when one of its operands
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; is known to be zero extended.
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@k = local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind
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define signext i32 @cmplwi(ptr nocapture readonly %p, ptr nocapture readonly %q, i32 signext %j, i32 signext %r10) {
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entry:
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%0 = load i32, ptr %q, align 4
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%shl = shl i32 %0, %j
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%1 = load i32, ptr %p, align 4
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%and = and i32 %shl, %r10
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%and1 = and i32 %and, %1
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%tobool = icmp eq i32 %and1, 0
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br i1 %tobool, label %cleanup, label %if.then
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if.then:
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store i32 %j, ptr @k, align 4
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br label %cleanup
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cleanup:
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%retval.0 = phi i32 [ 0, %if.then ], [ 1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: cmplwi:
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; CHECK: lwz [[T1:[0-9]+]], 0(3)
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; CHECK: and. {{[0-9]+}}, {{[0-9]+}}, [[T1]]
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; CHECK-NOT: cmplwi
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; CHECK-NEXT: beq 0,
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