derek.holloway
7502bf64a4
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61 lines
1.7 KiB
LLVM
61 lines
1.7 KiB
LLVM
; RUN: opt -passes=licm -verify-memoryssa -S < %s | FileCheck %s
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; Function Attrs: noinline norecurse nounwind readnone ssp uwtable
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define zeroext i1 @invariant_denom(double %v) #0 {
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entry:
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; CHECK-LABEL: @invariant_denom(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: fdiv fast double 1.000000e+00, %v
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br label %loop
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loop: ; preds = %entry, %loop
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%v3 = phi i32 [ 0, %entry ], [ %v11, %loop ]
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%v4 = phi i32 [ 0, %entry ], [ %v12, %loop ]
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%v5 = uitofp i32 %v4 to double
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; CHECK-LABEL: loop:
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; CHECK: fmul fast double
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; CHECK-NOT: fdiv
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%v6 = fdiv fast double %v5, %v
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%v7 = fptoui double %v6 to i64
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%v8 = and i64 %v7, 1
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%v9 = xor i64 %v8, 1
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%v10 = trunc i64 %v9 to i32
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%v11 = add i32 %v10, %v3
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%v12 = add nuw i32 %v4, 1
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%v13 = icmp eq i32 %v12, -1
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br i1 %v13, label %end, label %loop
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end: ; preds = %loop
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%v15 = phi i32 [ %v11, %loop ]
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%v16 = icmp ne i32 %v15, 0
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ret i1 %v16
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}
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define void @invariant_fdiv(ptr %out, float %arg) {
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; CHECK-LABEL: @invariant_fdiv(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %div = fdiv fast float 4.000000e+00, %arg
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; CHECK-NEXT: fmul fast float %div, f0x4F800000
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entry:
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br label %loop
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loop: ; preds = %loop, %entry
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%ind = phi i32 [ 0, %entry ], [ %inc, %loop ]
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; CHECK-LABEL: loop:
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; CHECK: getelementptr
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; CHECK-NOT: fdiv
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; CHECK-NOT: fmul
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%div = fdiv fast float 4.000000e+00, %arg
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%mul = fmul fast float %div, 0x41F0000000000000
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%gep = getelementptr inbounds float, ptr %out, i32 %ind
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store float %mul, ptr %gep, align 4
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%inc = add nuw nsw i32 %ind, 1
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%cond = icmp eq i32 %inc, 1024
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br i1 %cond, label %exit, label %loop
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exit: ; preds = %loop
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ret void
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}
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