forked from OSchip/llvm-project
78 lines
2.5 KiB
LLVM
78 lines
2.5 KiB
LLVM
; RUN: opt -passes='default<O1>' -disable-verify --mtriple x86_64-pc-linux-gnu -new-pm-disable-loop-unrolling=true \
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; RUN: -S -o - %s | FileCheck %s
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; This checks that the loop full unroller will fire in the new pass manager
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; when forced via #pragma in the source (or annotation in the code).
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; We don't end up deleting the loop, merely turning it infinite, but we remove
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; everything inside of it so check for the loop structure and absence of
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; conditional branches.
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; CHECK-LABEL: bb
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; CHECK: br label
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; CHECK-NOT: br i1
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; CHECK: br label
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; CHECK-NOT: br i1
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; Function Attrs: noinline nounwind optnone uwtable
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define void @foo() #0 {
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bb:
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%tmp = alloca [5 x i32*], align 16
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%tmp1 = alloca i32, align 4
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%tmp2 = alloca i32, align 4
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store i32 5, i32* %tmp1, align 4
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br label %bb3
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bb3: ; preds = %bb23, %bb
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%tmp4 = load i32, i32* %tmp1, align 4
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%tmp5 = icmp ne i32 %tmp4, 0
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br i1 %tmp5, label %bb6, label %bb24
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bb6: ; preds = %bb3
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store i32 0, i32* %tmp2, align 4
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br label %bb7
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bb7: ; preds = %bb20, %bb6
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%tmp8 = load i32, i32* %tmp2, align 4
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%tmp9 = icmp slt i32 %tmp8, 5
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br i1 %tmp9, label %bb10, label %bb23
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bb10: ; preds = %bb7
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%tmp11 = load i32, i32* %tmp2, align 4
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%tmp12 = sext i32 %tmp11 to i64
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%tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %tmp12
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%tmp14 = load i32*, i32** %tmp13, align 8
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%tmp15 = icmp ne i32* %tmp14, null
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br i1 %tmp15, label %bb16, label %bb19
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bb16: ; preds = %bb10
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%tmp17 = load i32, i32* %tmp1, align 4
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%tmp18 = add nsw i32 %tmp17, -1
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store i32 %tmp18, i32* %tmp1, align 4
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br label %bb19
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bb19: ; preds = %bb16, %bb10
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br label %bb20
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bb20: ; preds = %bb19
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%tmp21 = load i32, i32* %tmp2, align 4
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%tmp22 = add nsw i32 %tmp21, 1
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store i32 %tmp22, i32* %tmp2, align 4
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br label %bb7, !llvm.loop !1
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bb23: ; preds = %bb7
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br label %bb3
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bb24: ; preds = %bb3
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ret void
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}
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attributes #0 = { noinline nounwind optnone uwtable }
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = distinct !{!1, !2}
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!2 = !{!"llvm.loop.unroll.full"}
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