1 files changed, 41 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll b/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll
new file mode 100644
index 0000000..d0b8ab2
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll
@@ -0,0 +1,41 @@
+; RUN: opt -S -simplifycfg < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
+; rdar://17735071
+target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin12.0.0"
+
+; When tableindex can't fit into i2, we should extend the type to i3.
+; CHECK-LABEL: @_TFO6reduce1E5toRawfS0_FT_Si
+; CHECK: entry:
+; CHECK-NEXT: sub i2 %0, -2
+; CHECK-NEXT: zext i2 %switch.tableidx to i3
+; CHECK-NEXT: getelementptr inbounds [4 x i64]* @switch.table, i32 0, i3 %switch.tableidx.zext
+; CHECK-NEXT: load i64* %switch.gep
+; CHECK-NEXT: ret i64 %switch.load
+define i64 @_TFO6reduce1E5toRawfS0_FT_Si(i2) {
+entry:
+  switch i2 %0, label %1 [
+    i2 0, label %2
+    i2 1, label %3
+    i2 -2, label %4
+    i2 -1, label %5
+  ]
+
+; <label>:1                                       ; preds = %entry
+  unreachable
+
+; <label>:2                                       ; preds = %2
+  br label %6
+
+; <label>:3                                       ; preds = %4
+  br label %6
+
+; <label>:4                                       ; preds = %6
+  br label %6
+
+; <label>:5                                       ; preds = %8
+  br label %6
+
+; <label>:6                                      ; preds = %3, %5, %7, %9
+  %7 = phi i64 [ 3, %5 ], [ 2, %4 ], [ 1, %3 ], [ 0, %2 ]
+  ret i64 %7
+}