derek.holloway
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76 lines
2.4 KiB
LLVM
76 lines
2.4 KiB
LLVM
; RUN: opt -passes='early-cse<memssa>,loop-mssa(loop-rotate,licm,loop-rotate)' -earlycse-debug-hash -S %s -o - | FileCheck %s
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; ModuleID = 'bugpoint-reduced-simplified.bc'
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source_filename = "bugpoint-output-8903f29.bc"
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target datalayout = "e-m:e-i64:64-n32:64"
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target triple = "powerpc64le-unknown-linux-gnu"
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define void @test(i64 %arg.ssa, i64 %arg.nb) local_unnamed_addr {
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; Ensure that loop rotation doesn't duplicate the call to
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; llvm.loop.decrement
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; CHECK-LABEL: test
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; CHECK: call i1 @llvm.loop.decrement
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; CHECK-NOT: call i1 @llvm.loop.decrement
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; CHECK: declare i1 @llvm.loop.decrement
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entry:
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switch i32 undef, label %BB_8 [
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i32 -2, label %BB_9
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i32 0, label %BB_9
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]
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BB_1: ; preds = %BB_12, %BB_4
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%bcount.1.us = phi i64 [ %.810.us, %BB_4 ], [ 0, %BB_12 ]
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%0 = add i64 %arg.ssa, %bcount.1.us
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%.568.us = load i32, ptr undef, align 4
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%.15.i.us = icmp slt i32 0, %.568.us
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br i1 %.15.i.us, label %BB_3, label %BB_2
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BB_2: ; preds = %BB_1
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%.982.us = add nsw i64 %0, 1
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unreachable
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BB_3: ; preds = %BB_1
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%1 = add i64 %arg.ssa, %bcount.1.us
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%2 = add i64 %1, 1
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%3 = call i1 @llvm.loop.decrement.i32(i32 1)
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br i1 %3, label %BB_4, label %BB_7
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BB_4: ; preds = %BB_3
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%.810.us = add nuw nsw i64 %bcount.1.us, 1
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br label %BB_1
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BB_5: ; preds = %BB_7, %BB_5
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%lsr.iv20.i116 = phi i64 [ %2, %BB_7 ], [ %lsr.iv.next21.i126, %BB_5 ]
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%lsr.iv.next21.i126 = add i64 %lsr.iv20.i116, 1
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br i1 undef, label %BB_5, label %BB_6
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BB_6: ; preds = %BB_5
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ret void
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BB_7: ; preds = %BB_3
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br label %BB_5
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BB_8: ; preds = %entry
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ret void
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BB_9: ; preds = %entry, %entry
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br label %BB_10
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BB_10: ; preds = %BB_9
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br label %BB_11
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BB_11: ; preds = %BB_11, %BB_10
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br i1 undef, label %BB_11, label %BB_12
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BB_12: ; preds = %BB_11
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call void @llvm.set.loop.iterations.i64(i64 %arg.nb)
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br label %BB_1
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}
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; Function Attrs: nounwind
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declare void @llvm.set.loop.iterations.i64(i64) #0
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; Function Attrs: nounwind
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declare i1 @llvm.loop.decrement.i32(i32) #0
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attributes #0 = { nounwind }
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