71 lines
2.0 KiB
LLVM
71 lines
2.0 KiB
LLVM
; RUN: opt -S -loop-unroll -unroll-runtime %s -o - | FileCheck %s
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; RUN: opt -S -loop-unroll -unroll-runtime -unroll-max-upperbound=6 %s -o - | FileCheck %s --check-prefix=UPPER
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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@global = dso_local local_unnamed_addr global i32 0, align 4
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@global.1 = dso_local local_unnamed_addr global i8* null, align 4
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; Check that loop in hoge_3, with a runtime upperbound of 3, is not unrolled.
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; CHECK-LABEL: hoge_3
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; CHECK: loop:
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; CHECK: store
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; CHECK-NOT: store
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; CHECK: br i1 %{{.*}}, label %loop
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; UPPER-LABEL: hoge_3
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; UPPER: loop:
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; UPPER: store
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; UPPER-NOT: store
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; UPPER: br i1 %{{.*}}, label %loop
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define dso_local void @hoge_3(i8 %arg) {
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entry:
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%x = load i32, i32* @global, align 4
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%y = load i8*, i8** @global.1, align 4
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%0 = icmp ult i32 %x, 17
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br i1 %0, label %loop, label %exit
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loop:
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%iv = phi i32 [ %x, %entry ], [ %iv.next, %loop ]
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%ptr = phi i8* [ %y, %entry ], [ %ptr.next, %loop ]
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%iv.next = add nuw i32 %iv, 8
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%ptr.next = getelementptr inbounds i8, i8* %ptr, i32 1
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store i8 %arg, i8* %ptr.next, align 1
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%1 = icmp ult i32 %iv.next, 17
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br i1 %1, label %loop, label %exit
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exit:
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ret void
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}
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; Check that loop in hoge_5, with a runtime upperbound of 5, is unrolled when -unroll-max-upperbound=4
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; CHECK-LABEL: hoge_5
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; CHECK: loop:
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; CHECK: store
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; CHECK-NOT: store
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; CHECK: br i1 %{{.*}}, label %loop
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; UPPER-LABEL: hoge_5
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; UPPER: loop:
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; UPPER: store
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; UPPER: store
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; UPPER: store
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; UPPER: br i1 %{{.*}}, label %loop
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define dso_local void @hoge_5(i8 %arg) {
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entry:
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%x = load i32, i32* @global, align 4
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%y = load i8*, i8** @global.1, align 4
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%0 = icmp ult i32 %x, 17
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br i1 %0, label %loop, label %exit
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loop:
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%iv = phi i32 [ %x, %entry ], [ %iv.next, %loop ]
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%ptr = phi i8* [ %y, %entry ], [ %ptr.next, %loop ]
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%iv.next = add nuw i32 %iv, 4
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%ptr.next = getelementptr inbounds i8, i8* %ptr, i32 1
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store i8 %arg, i8* %ptr.next, align 1
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%1 = icmp ult i32 %iv.next, 17
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br i1 %1, label %loop, label %exit
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exit:
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ret void
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}
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