[JumpThreading] Fix opcode bonus in getJumpThreadDuplicationCost()
The code that was meant to adjust the duplication cost based on the
terminator opcode was not being executed in cases where the initial
threshold was hit inside the loop.
Subscribers: mcrosier, llvm-commits
Differential Revision: http://reviews.llvm.org/D15536
llvm-svn: 256568
diff --git a/llvm/test/Transforms/JumpThreading/select.ll b/llvm/test/Transforms/JumpThreading/select.ll
index d0df772..595cacb 100644
--- a/llvm/test/Transforms/JumpThreading/select.ll
+++ b/llvm/test/Transforms/JumpThreading/select.ll
@@ -91,6 +91,36 @@
}
+; Jump threading of indirectbr with select as address. Test increased
+; duplication threshold for cases where indirectbr is being threaded
+; through.
+
+; CHECK-LABEL: @test_indirectbr_thresh(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 %cond, label %L1, label %L3
+; CHECK-NOT: indirectbr
+define void @test_indirectbr_thresh(i1 %cond, i8* %address) nounwind {
+entry:
+ br i1 %cond, label %L0, label %L3
+L0:
+ %indirect.goto.dest = select i1 %cond, i8* blockaddress(@test_indirectbr_thresh, %L1), i8* %address
+ call void @quux()
+ call void @quux()
+ call void @quux()
+ indirectbr i8* %indirect.goto.dest, [label %L1, label %L2, label %L3]
+
+L1:
+ call void @foo()
+ ret void
+L2:
+ call void @bar()
+ ret void
+L3:
+ call void @baz()
+ ret void
+}
+
+
; A more complicated case: the condition is a select based on a comparison.
; CHECK-LABEL: @test_switch_cmp(