[PlaceSafepoints] Make the width of a counted loop settable.

[oota-llvm.git] / test / Transforms / PlaceSafepoints / finite-loops.ll

diff --git a/test/Transforms/PlaceSafepoints/finite-loops.ll b/test/Transforms/PlaceSafepoints/finite-loops.ll
index 3cc7158afcfe339276ea301be2962511c76f14e5..9121e92896c8379c66c0e75bf525a2c43c5d5fc5 100644 (file)
--- a/test/Transforms/PlaceSafepoints/finite-loops.ll
+++ b/test/Transforms/PlaceSafepoints/finite-loops.ll
@@ -1,6 +1,7 @@
 ; Tests to ensure that we are not placing backedge safepoints in
 ; loops which are clearly finite.
-;; RUN: opt %s -place-safepoints -S | FileCheck %s
+;; RUN: opt %s -place-safepoints -spp-counted-loop-trip-width=32 -S | FileCheck %s
+;; RUN: opt %s -place-safepoints -spp-counted-loop-trip-width=64 -S | FileCheck %s -check-prefix=COUNTED-64
 
 
 ; A simple counted loop with trivially known range
@@ -69,6 +70,61 @@ exit:
   ret void
 }
 
+; The range is a 64 bit value
+define void @test4(i64 %upper) gc "statepoint-example" {
+; CHECK-LABEL: test4
+; CHECK-LABEL: entry
+; CHECK: statepoint
+; CHECK-LABEL: loop
+; CHECK: statepoint
+
+; COUNTED-64-LABEL: test4
+; COUNTED-64-LABEL: entry
+; COUNTED-64: statepoint
+; COUNTED-64-LABEL: loop
+; COUNTED-64-NOT: statepoint
+
+entry:
+  br label %loop
+
+loop:
+  %counter = phi i64 [ 0 , %entry ], [ %counter.inc , %loop ]
+  %counter.inc = add i64 %counter, 1
+  %counter.cmp = icmp slt i64 %counter.inc, %upper
+  br i1 %counter.cmp, label %loop, label %exit
+
+exit:
+  ret void
+}
+
+; This loop can run infinitely (for %upper == INT64_MAX) so it needs a
+; safepoint.
+define void @test5(i64 %upper) gc "statepoint-example" {
+; CHECK-LABEL: test5
+; CHECK-LABEL: entry
+; CHECK: statepoint
+; CHECK-LABEL: loop
+; CHECK: statepoint
+
+; COUNTED-64-LABEL: test5
+; COUNTED-64-LABEL: entry
+; COUNTED-64: statepoint
+; COUNTED-64-LABEL: loop
+; COUNTED-64: statepoint
+
+entry:
+  br label %loop
+
+loop:
+  %counter = phi i64 [ 0 , %entry ], [ %counter.inc , %loop ]
+  %counter.inc = add i64 %counter, 1
+  %counter.cmp = icmp sle i64 %counter.inc, %upper
+  br i1 %counter.cmp, label %loop, label %exit
+
+exit:
+  ret void
+}
+
 
 ; This function is inlined when inserting a poll.
 declare void @do_safepoint()