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Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/tripcount-overflow.ll')
-rw-r--r-- | llvm/test/Transforms/LoopUnroll/tripcount-overflow.ll | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/tripcount-overflow.ll b/llvm/test/Transforms/LoopUnroll/tripcount-overflow.ll deleted file mode 100644 index 0d5681b539a..00000000000 --- a/llvm/test/Transforms/LoopUnroll/tripcount-overflow.ll +++ /dev/null @@ -1,49 +0,0 @@ -; RUN: opt < %s -S -unroll-runtime -unroll-count=2 -loop-unroll -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG -; RUN: opt < %s -S -unroll-runtime -unroll-count=2 -loop-unroll -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG -target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" - -; This test case documents how runtime loop unrolling handles the case -; when the backedge-count is -1. - -; If %N, the backedge-taken count, is -1 then %0 unsigned-overflows -; and is 0. %xtraiter too is 0, signifying that the total trip-count -; is divisible by 2. The prologue then branches to the unrolled loop -; and executes the 2^32 iterations there, in groups of 2. - -; EPILOG: entry: - -; EPILOG-NEXT: %0 = add i32 %N, 1 -; EPILOG-NEXT: %xtraiter = and i32 %0, 1 -; EPILOG-NEXT: %1 = icmp ult i32 %N, 1 -; EPILOG-NEXT: br i1 %1, label %while.end.unr-lcssa, label %entry.new -; EPILOG: while.body: - -; EPILOG: %lcmp.mod = icmp ne i32 %xtraiter, 0 -; EPILOG-NEXT: br i1 %lcmp.mod, label %while.body.epil.preheader, label %while.end -; EPILOG: while.body.epil: - -; PROLOG: entry: -; PROLOG-NEXT: %0 = add i32 %N, 1 -; PROLOG-NEXT: %xtraiter = and i32 %0, 1 -; PROLOG-NEXT: %lcmp.mod = icmp ne i32 %xtraiter, 0 -; PROLOG-NEXT: br i1 %lcmp.mod, label %while.body.prol.preheader, label %while.body.prol.loopexit -; PROLOG: while.body.prol: - -; PROLOG: %1 = icmp ult i32 %N, 1 -; PROLOG-NEXT: br i1 %1, label %while.end, label %entry.new -; PROLOG: while.body: - -; Function Attrs: nounwind readnone ssp uwtable -define i32 @foo(i32 %N) { -entry: - br label %while.body - -while.body: ; preds = %while.body, %entry - %i = phi i32 [ 0, %entry ], [ %inc, %while.body ] - %cmp = icmp eq i32 %i, %N - %inc = add i32 %i, 1 - br i1 %cmp, label %while.end, label %while.body - -while.end: ; preds = %while.body - ret i32 %i -} |