Fix PR7174, a couple o Mips fixes:

- Fix a typo for PIC check during jmp table lowering
- Also fix the "first jump table basic block is not
considered only reachable by fall through" problem, use this
ad-hoc solution until I come up with something better.

Patch by stetorvs@gmail.com

llvm-svn: 108820

1 files changed, 33 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Mips/2010-07-20-Switch.ll b/llvm/test/CodeGen/Mips/2010-07-20-Switch.ll
new file mode 100644
index 00000000000..07fc10cae18
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/2010-07-20-Switch.ll
@@ -0,0 +1,33 @@
+; RUN: llc < %s -march=mips -relocation-model=static | FileCheck %s
+
+define i32 @main() nounwind readnone {
+entry:
+  %x = alloca i32, align 4                        ; <i32*> [#uses=2]
+  volatile store i32 2, i32* %x, align 4
+  %0 = volatile load i32* %x, align 4             ; <i32> [#uses=1]
+; CHECK: lui $3, %hi($JTI0_0)
+; CHECK: sll $2, $2, 2
+; CHECK: addiu $3, $3, %lo($JTI0_0)
+  switch i32 %0, label %bb4 [
+    i32 0, label %bb5
+    i32 1, label %bb1
+    i32 2, label %bb2
+    i32 3, label %bb3
+  ]
+
+bb1:                                              ; preds = %entry
+  ret i32 2
+
+; CHECK: $BB0_2
+bb2:                                              ; preds = %entry
+  ret i32 0
+
+bb3:                                              ; preds = %entry
+  ret i32 3
+
+bb4:                                              ; preds = %entry
+  ret i32 4
+
+bb5:                                              ; preds = %entry
+  ret i32 1
+}