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https://github.com/RPCS3/llvm-mirror.git
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6a0879ec65
Summary: There are some rough corners, since the new pass manager doesn't have (as far as I can tell) LoopSimplify and LCSSA, so I've updated the tests to run them separately in the old pass manager in the lit tests. We also don't have an equivalent for AU.setPreservesCFG() in the new pass manager, so I've left a FIXME. Reviewers: bogner, chandlerc, davide Subscribers: sanjoy, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D20783 llvm-svn: 271846
115 lines
2.5 KiB
LLVM
115 lines
2.5 KiB
LLVM
;; RUN: opt -S < %s -indvars | FileCheck %s
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; RUN: opt -lcssa -loop-simplify -S < %s | opt -S -passes='require<targetir>,require<scalar-evolution>,require<domtree>,loop(indvars)'
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;; Check if llvm can narrow !range metadata based on loop entry
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;; predicates.
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declare void @abort()
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define i1 @bounded_below_slt(i32* nocapture readonly %buffer) {
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; CHECK-LABEL: bounded_below_slt
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entry:
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%length = load i32, i32* %buffer, !range !0
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%entry.pred = icmp eq i32 %length, 0
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br i1 %entry.pred, label %abort, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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; CHECK: loop
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%idx = phi i32 [ %idx.inc, %loop.next ], [ 0, %loop.preheader ]
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%oob.pred = icmp slt i32 %idx, %length
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br i1 %oob.pred, label %loop.next, label %oob
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; CHECK: br i1 true, label %loop.next, label %oob
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loop.next:
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; CHECK: loop.next
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%idx.inc = add i32 %idx, 1
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%exit.pred = icmp slt i32 %idx.inc, %length
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br i1 %exit.pred, label %loop, label %abort.loopexit
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abort.loopexit:
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br label %abort
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abort:
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ret i1 false
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oob:
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tail call void @abort()
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ret i1 false
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}
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define i1 @bounded_below_sle(i32* nocapture readonly %buffer) {
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; CHECK-LABEL: bounded_below_sle
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entry:
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%length = load i32, i32* %buffer, !range !0
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%entry.pred = icmp eq i32 %length, 0
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br i1 %entry.pred, label %abort, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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; CHECK: loop
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%idx = phi i32 [ %idx.inc, %loop.next ], [ 0, %loop.preheader ]
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%oob.pred = icmp sle i32 %idx, %length
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br i1 %oob.pred, label %loop.next, label %oob
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; CHECK: br i1 true, label %loop.next, label %oob
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loop.next:
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; CHECK: loop.next
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%idx.inc = add i32 %idx, 1
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%exit.pred = icmp sle i32 %idx.inc, %length
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br i1 %exit.pred, label %loop, label %abort.loopexit
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abort.loopexit:
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br label %abort
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abort:
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ret i1 false
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oob:
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tail call void @abort()
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ret i1 false
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}
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;; Assert that we're not making an incorrect transform.
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declare i32 @check(i8*)
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define void @NoChange() {
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; CHECK-LABEL: NoChange
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entry:
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br label %loop.begin
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loop.begin:
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; CHECK: loop.begin:
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%i.01 = phi i64 [ 2, %entry ], [ %add, %loop.end ]
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%cmp = icmp ugt i64 %i.01, 1
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; CHECK: %cmp = icmp ugt i64 %i.01, 1
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br i1 %cmp, label %loop, label %loop.end
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loop:
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; CHECK: loop
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%.sum = add i64 %i.01, -2
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%v = getelementptr inbounds i8, i8* null, i64 %.sum
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%r = tail call i32 @check(i8* %v)
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%c = icmp eq i32 %r, 0
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br i1 %c, label %loop.end, label %abort.now
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abort.now:
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tail call void @abort()
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unreachable
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loop.end:
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%add = add i64 %i.01, -1
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%eq = icmp eq i64 %add, 0
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br i1 %eq, label %exit, label %loop.begin
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exit:
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ret void
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}
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!0 = !{i32 0, i32 100}
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