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Switch to WeakVHs in the value mapper, and aggressively prune dead basic

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blocks in the function cloner. This removes the last case of trivially
dead code that I've been seeing in the wild getting inlined, analyzed,
re-inlined, optimized, only to be deleted. Nukes a FIXME from the
cleanup tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-03-28 08:38:27 +00:00
parent 9fc5c83fb7
commit afff33001a
3 changed files with 24 additions and 14 deletions
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test/Transforms/Inline/inline_cleanup.ll
-10
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@@ -130,16 +130,6 @@ define void @outer2(i32 %z, i1 %b) {
; make it through inlining.
; CHECK: define void @outer2
; CHECK-NOT: call
;
; FIXME: Currently, we aren't smart enough to delete the last dead basic block.
; However, we do make the condition a constant. Check that at least until we can
; start removing the block itself.
; CHECK: br i1 false, label %[[LABEL:[a-z0-9_.]+]],
; CHECK-NOT: call
; CHECK: [[LABEL]]:
; CHECK-NEXT: call void @f(i32 10)
; CHECK-NOT: call
;
; CHECK: ret void
entry: