Replace the old ADCE implementation with a new one that more simply solves

the one case that ADCE catches that normal DCE doesn't: non-induction variable
loop computations.

This implementation handles this problem without using postdominators.

llvm-svn: 51668

2 files changed, 0 insertions, 44 deletions

diff --git a/llvm/test/Transforms/ADCE/2003-12-19-MergeReturn.ll b/llvm/test/Transforms/ADCE/2003-12-19-MergeReturn.ll
deleted file mode 100644
index b2c294b1df0..00000000000
--- a/llvm/test/Transforms/ADCE/2003-12-19-MergeReturn.ll
+++ /dev/null
@@ -1,27 +0,0 @@
-; This testcase was failing because without merging the return blocks, ADCE
-; didn't know that it could get rid of the then.0 block.
-
-; RUN: llvm-as < %s | opt -adce | llvm-dis | not grep load
-
-
-define void @main(i32 %argc, i8** %argv) {
-entry:
-        call void @__main( )
-        %tmp.1 = icmp ule i32 %argc, 5          ; <i1> [#uses=1]
-        br i1 %tmp.1, label %then.0, label %return
-
-then.0:         ; preds = %entry
-        %tmp.8 = load i8** %argv                ; <i8*> [#uses=1]
-        %tmp.10 = load i8* %tmp.8               ; <i8> [#uses=1]
-        %tmp.11 = icmp eq i8 %tmp.10, 98                ; <i1> [#uses=1]
-        br i1 %tmp.11, label %then.1, label %return
-
-then.1:         ; preds = %then.0
-        ret void
-
-return:         ; preds = %then.0, %entry
-        ret void
-}
-
-declare void @__main()
-
diff --git a/llvm/test/Transforms/ADCE/dead-phi-edge.ll b/llvm/test/Transforms/ADCE/dead-phi-edge.ll
deleted file mode 100644
index 844560181a2..00000000000
--- a/llvm/test/Transforms/ADCE/dead-phi-edge.ll
+++ /dev/null
@@ -1,17 +0,0 @@
-; RUN: llvm-as < %s | opt -adce | llvm-dis | not grep call
-
-; The call is not live just because the PHI uses the call retval!
-
-define i32 @test(i32 %X) {
-; <label>:0
-        br label %Done
-
-DeadBlock:              ; No predecessors!
-        %Y = call i32 @test( i32 0 )            ; <i32> [#uses=1]
-        br label %Done
-
-Done:           ; preds = %DeadBlock, %0
-        %Z = phi i32 [ %X, %0 ], [ %Y, %DeadBlock ]             ; <i32> [#uses=1]
-        ret i32 %Z
-}
-