Testcase for 71688.
llvm-svn: 71691
diff --git a/llvm/test/Transforms/SimplifyCFG/2009-05-12-externweak.ll b/llvm/test/Transforms/SimplifyCFG/2009-05-12-externweak.ll
new file mode 100644
index 0000000..5969f27
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyCFG/2009-05-12-externweak.ll
@@ -0,0 +1,47 @@
+; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep select
+; ModuleID = '<stdin>'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin10.0"
+module asm ".globl _foo"
+module asm "_foo: ret"
+module asm ".globl _i"
+module asm ".set _i, 0"
+@i = extern_weak global i32 ; <i32*> [#uses=2]
+@j = common global i32 0 ; <i32*> [#uses=1]
+@ed = common global double 0.000000e+00, align 8 ; <double*> [#uses=1]
+
+define i32 @main() nounwind ssp {
+entry:
+ br label %bb4
+
+bb: ; preds = %bb4
+ br i1 icmp ne (i32* @i, i32* null), label %bb1, label %bb2
+
+bb1: ; preds = %bb
+ %0 = load i32* @i, align 4 ; <i32> [#uses=1]
+ br label %bb3
+
+bb2: ; preds = %bb
+ br label %bb3
+
+bb3: ; preds = %bb2, %bb1
+ %storemerge = phi i32 [ %0, %bb1 ], [ 0, %bb2 ] ; <i32> [#uses=2]
+ store i32 %storemerge, i32* @j
+ %1 = sitofp i32 %storemerge to double ; <double> [#uses=1]
+ %2 = call double @sin(double %1) nounwind readonly ; <double> [#uses=1]
+ %3 = add double %2, %d.0 ; <double> [#uses=1]
+ %4 = add i32 %l.0, 1 ; <i32> [#uses=1]
+ br label %bb4
+
+bb4: ; preds = %bb3, %entry
+ %d.0 = phi double [ undef, %entry ], [ %3, %bb3 ] ; <double> [#uses=2]
+ %l.0 = phi i32 [ 0, %entry ], [ %4, %bb3 ] ; <i32> [#uses=2]
+ %5 = icmp sgt i32 %l.0, 99 ; <i1> [#uses=1]
+ br i1 %5, label %bb5, label %bb
+
+bb5: ; preds = %bb4
+ store double %d.0, double* @ed, align 8
+ ret i32 0
+}
+
+declare double @sin(double) nounwind readonly