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0a4f3b84af
This is to avoid inlining too many multiplication operands into a SCEV, which could take exponential time in the worst case. Reviewers: Sanjoy Das, Mehdi Amini, Michael Zolotukhin Differential Revision: https://reviews.llvm.org/D25794 llvm-svn: 284784
30 lines
1.0 KiB
LLVM
30 lines
1.0 KiB
LLVM
; RUN: opt -analyze -scalar-evolution -scev-mulops-inline-threshold=1 < %s | FileCheck --check-prefix=CHECK1 %s
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; RUN: opt -analyze -scalar-evolution -scev-mulops-inline-threshold=10 < %s | FileCheck --check-prefix=CHECK10 %s
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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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@a = local_unnamed_addr global i32 0, align 4
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@b = local_unnamed_addr global i32 0, align 4
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define i32 @main() local_unnamed_addr {
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; CHECK1: %mul.1 = mul nsw i32 %mul, %mul
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; CHECK1: --> ((%a.promoted * %a.promoted) * (%a.promoted * %a.promoted))
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; CHECK10: %mul.1 = mul nsw i32 %mul, %mul
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; CHECK10: --> (%a.promoted * %a.promoted * %a.promoted * %a.promoted)
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entry:
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%a.promoted = load i32, i32* @a, align 4
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%mul = mul nsw i32 %a.promoted, %a.promoted
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%mul.1 = mul nsw i32 %mul, %mul
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%mul.2 = mul nsw i32 %mul.1, %mul.1
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%mul.3 = mul nsw i32 %mul.2, %mul.2
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%mul.4 = mul nsw i32 %mul.3, %mul.3
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%mul.5 = mul nsw i32 %mul.4, %mul.4
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store i32 %mul.5, i32* @a, align 4
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store i32 31, i32* @b, align 4
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ret i32 0
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}
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