derek.holloway
7502bf64a4
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48 lines
1.1 KiB
LLVM
48 lines
1.1 KiB
LLVM
; RUN: opt < %s -loop-reduce -S -mtriple=x86_64-unknown-unknown | FileCheck %s
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;
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; Test LSR's OptimizeShadowIV. Handle a floating-point IV with a
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; nonzero initial value.
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; rdar://9786536
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; Provide legal integer types.
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target datalayout = "n8:16:32:64"
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; First, make sure LSR doesn't crash on an empty IVUsers list.
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; CHECK-LABEL: @dummyIV(
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; CHECK-NOT: phi
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; CHECK-NOT: sitofp
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; CHECK: br
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define void @dummyIV() nounwind {
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entry:
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br label %loop
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loop:
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%i.01 = phi i32 [ -39, %entry ], [ %inc, %loop ]
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%conv = sitofp i32 %i.01 to double
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%inc = add nsw i32 %i.01, 1
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br i1 true, label %loop, label %for.end
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for.end:
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unreachable
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}
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; Now check that the computed double constant is correct.
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; CHECK-LABEL: @doubleIV(
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; CHECK: phi double [ -3.900000e+01, %entry ]
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; CHECK: br
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define void @doubleIV() nounwind {
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entry:
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br label %loop
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loop:
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%i.01 = phi i32 [ -39, %entry ], [ %inc, %loop ]
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%conv = sitofp i32 %i.01 to double
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%div = fdiv double %conv, 4.000000e+01
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%inc = add nsw i32 %i.01, 1
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br i1 false, label %loop, label %for.end
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for.end:
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unreachable
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}
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