Testcase for 71688.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71691 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/SimplifyCFG/2009-05-12-externweak.ll b/test/Transforms/SimplifyCFG/2009-05-12-externweak.ll
new file mode 100644 (file)
index 0000000..5969f27
--- /dev/null
+++ b/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