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7f0355fada
Summary: Teach SimpleLoopUnswitch to preserve MemorySSA. Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits Differential Revision: https://reviews.llvm.org/D47022 llvm-svn: 348263
27 lines
995 B
LLVM
27 lines
995 B
LLVM
; RUN: opt < %s -simple-loop-unswitch -disable-output
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; RUN: opt < %s -simple-loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output
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; PR12887
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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-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@a = common global i32 0, align 4
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@c = common global i32 0, align 4
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@b = common global i32 0, align 4
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define void @func() noreturn nounwind uwtable {
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entry:
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%0 = load i32, i32* @a, align 4
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%tobool = icmp eq i32 %0, 0
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%1 = load i32, i32* @b, align 4
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br label %while.body
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while.body: ; preds = %while.body, %entry
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%d.0 = phi i8 [ undef, %entry ], [ %conv2, %while.body ]
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%conv = sext i8 %d.0 to i32
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%cond = select i1 %tobool, i32 0, i32 %conv
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%conv11 = zext i8 %d.0 to i32
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%add = add i32 %1, %conv11
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%conv2 = trunc i32 %add to i8
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br label %while.body
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}
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