derek.holloway
7502bf64a4
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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; RUN: opt < %s -passes=indvars -S | FileCheck %s
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; Test WidenIV::GetExtendedOperandRecurrence.
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; %add, %sub and %mul should be extended to i64 because it is nsw, even though its
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; sext cannot be hoisted outside the loop.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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declare void @use(i64 %x)
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define void @test(i1 %arg) nounwind {
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entry:
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br i1 %arg, label %for.body11, label %for.end285
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for.body11: ; preds = %entry
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%shl = shl i32 1, 1
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%shl132 = shl i32 %shl, 1
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br label %for.body153
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for.body153: ; preds = %for.body153, %for.body11
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br i1 %arg, label %for.body170, label %for.body153
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; CHECK: add nuw nsw i64 %indvars.iv, 1
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; CHECK: sub nsw i64 %indvars.iv, 2
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; CHECK: sub nsw i64 4, %indvars.iv
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; CHECK: mul nsw i64 %indvars.iv, 8
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for.body170: ; preds = %for.body170, %for.body153
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%i2.19 = phi i32 [ %add249, %for.body170 ], [ 0, %for.body153 ]
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%add = add nsw i32 %i2.19, 1
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%add.idxprom = sext i32 %add to i64
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call void @use(i64 %add.idxprom)
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%sub = sub nsw i32 %i2.19, 2
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%sub.idxprom = sext i32 %sub to i64
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call void @use(i64 %sub.idxprom)
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%sub.neg = sub nsw i32 4, %i2.19
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%sub.neg.idxprom = sext i32 %sub.neg to i64
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call void @use(i64 %sub.neg.idxprom)
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%mul = mul nsw i32 %i2.19, 8
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%mul.idxprom = sext i32 %mul to i64
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call void @use(i64 %mul.idxprom)
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%add249 = add nsw i32 %i2.19, %shl132
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br label %for.body170
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for.end285: ; preds = %entry
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ret void
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}
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