derek.holloway
7502bf64a4
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31 lines
1.1 KiB
LLVM
31 lines
1.1 KiB
LLVM
; RUN: opt < %s -passes=licm -S | FileCheck %s
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; RUN: opt -passes='require<aa>,require<target-ir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' < %s -S | FileCheck %s
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; PR19835
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @f(i32 %x) {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%storemerge4 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%mul = mul nsw i32 %x, %x
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%add2 = add nsw i32 %mul, %x
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%mul3 = add nsw i32 %add2, %mul
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%inc = add nsw i32 %storemerge4, 1
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%cmp = icmp slt i32 %inc, 100
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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%a9.0.lcssa = phi i32 [ %mul3, %for.body ]
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ret i32 %a9.0.lcssa
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}
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; Test that there is exactly one copy of mul nsw i32 %x, %x in the exit block.
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; CHECK: define i32 @f(i32 [[X:%.*]])
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; CHECK: for.end:
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; CHECK-NOT: mul nsw i32 [[X]], [[X]]
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; CHECK: mul nsw i32 [[X]], [[X]]
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; CHECK-NOT: mul nsw i32 [[X]], [[X]]
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