Avoid putting a split past the end of the live range; always shrink wrap live interval in the barrier mbb.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58309 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/pre-split8.ll b/test/CodeGen/X86/pre-split8.ll
new file mode 100644
index 0000000..eb6d49f
--- /dev/null
+++ b/test/CodeGen/X86/pre-split8.ll
@@ -0,0 +1,35 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -pre-alloc-split -stats |& \
+; RUN: grep {pre-alloc-split} | grep {Number of intervals split} | grep 1
+
+@current_surfaces.b = external global i1 ; <i1*> [#uses=1]
+
+declare double @asin(double) nounwind readonly
+
+declare double @tan(double) nounwind readonly
+
+define fastcc void @trace_line(i32 %line) nounwind {
+entry:
+ %.b3 = load i1* @current_surfaces.b ; <i1> [#uses=1]
+ br i1 %.b3, label %bb, label %return
+
+bb: ; preds = %bb9.i, %entry
+ %.rle4 = phi double [ %7, %bb9.i ], [ 0.000000e+00, %entry ] ; <double> [#uses=1]
+ %0 = load double* null, align 8 ; <double> [#uses=3]
+ %1 = fcmp une double %0, 0.000000e+00 ; <i1> [#uses=1]
+ br i1 %1, label %bb9.i, label %bb13.i
+
+bb9.i: ; preds = %bb
+ %2 = sub double %.rle4, %0 ; <double> [#uses=0]
+ %3 = tail call double @asin(double 0.000000e+00) nounwind readonly ; <double> [#uses=0]
+ %4 = mul double 0.000000e+00, %0 ; <double> [#uses=1]
+ %5 = tail call double @tan(double 0.000000e+00) nounwind readonly ; <double> [#uses=0]
+ %6 = mul double %4, 0.000000e+00 ; <double> [#uses=1]
+ %7 = add double %6, 0.000000e+00 ; <double> [#uses=1]
+ br i1 false, label %return, label %bb
+
+bb13.i: ; preds = %bb
+ unreachable
+
+return: ; preds = %bb9.i, %entry
+ ret void
+}