Fix PR4926. When target hook EmitInstrWithCustomInserter() insert new basic blocks and update CFG, it should also inform sdisel of the changes so the phi source operands will come from the right basic blocks.

llvm-svn: 82311

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/2009-09-19-SchedCustomLoweringBug.ll b/llvm/test/CodeGen/X86/2009-09-19-SchedCustomLoweringBug.ll
new file mode 100644
index 00000000000..646806e5dbb
--- /dev/null
+++ b/llvm/test/CodeGen/X86/2009-09-19-SchedCustomLoweringBug.ll
@@ -0,0 +1,30 @@
+; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck %s
+
+; PR4958
+
+define i32 @main() nounwind ssp {
+entry:
+; CHECK: main:
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  br label %bb
+
+bb:                                               ; preds = %bb1, %entry
+; CHECK:      movl %e
+; CHECK-NEXT: addl $1
+; CHECK-NEXT: movl %e
+; CHECK-NEXT: adcl $0
+  %i.0 = phi i64 [ 0, %entry ], [ %0, %bb1 ]      ; <i64> [#uses=1]
+  %0 = add nsw i64 %i.0, 1                        ; <i64> [#uses=2]
+  %1 = icmp sgt i32 0, 0                          ; <i1> [#uses=1]
+  br i1 %1, label %bb2, label %bb1
+
+bb1:                                              ; preds = %bb
+  %2 = icmp sle i64 %0, 1                         ; <i1> [#uses=1]
+  br i1 %2, label %bb, label %bb2
+
+bb2:                                              ; preds = %bb1, %bb
+  br label %return
+
+return:                                           ; preds = %bb2
+  ret i32 0
+}