Do not shrink wrap live interval in a mbb if it's livein any of its successor blocks. The mbb can be revisited again after all of the successors are processed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58184 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/pre-split6.ll b/test/CodeGen/X86/pre-split6.ll
new file mode 100644
index 0000000..c075b2a
--- /dev/null
+++ b/test/CodeGen/X86/pre-split6.ll
@@ -0,0 +1,36 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -pre-alloc-split
+
+@current_surfaces.b = external global i1 ; <i1*> [#uses=1]
+
+declare double @sin(double) nounwind readonly
+
+declare double @asin(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.nph, label %return
+
+bb.nph: ; preds = %entry
+ %0 = load double* null, align 8 ; <double> [#uses=1]
+ %1 = load double* null, align 8 ; <double> [#uses=2]
+ %2 = fcmp une double %0, 0.000000e+00 ; <i1> [#uses=1]
+ br i1 %2, label %bb9.i, label %bb13.i
+
+bb9.i: ; preds = %bb.nph
+ %3 = tail call double @asin(double 0.000000e+00) nounwind readonly ; <double> [#uses=0]
+ %4 = fdiv double 1.000000e+00, %1 ; <double> [#uses=1]
+ %5 = mul double %4, 0.000000e+00 ; <double> [#uses=1]
+ %6 = tail call double @asin(double %5) nounwind readonly ; <double> [#uses=0]
+ unreachable
+
+bb13.i: ; preds = %bb.nph
+ %7 = fdiv double 1.000000e+00, %1 ; <double> [#uses=1]
+ %8 = tail call double @sin(double 0.000000e+00) nounwind readonly ; <double> [#uses=1]
+ %9 = mul double %7, %8 ; <double> [#uses=1]
+ %10 = tail call double @asin(double %9) nounwind readonly ; <double> [#uses=0]
+ unreachable
+
+return: ; preds = %entry
+ ret void
+}