6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-23 06:35:25 +00:00
Code Issues Projects Releases Wiki Activity

Previously, RecursivelyDeleteDeadInstructions provided an option

Browse Source 
of returning a list of pointers to Values that are deleted. This was
unsafe, because the pointers in the list are, by nature of what
RecursivelyDeleteDeadInstructions does, always dangling. Replace this
with a simple callback mechanism. This may eventually be removed if
all clients can reasonably be expected to use CallbackVH.

Use this to factor out the dead-phi-cycle-elimination code from LSR
utility function, and generalize it to use the
RecursivelyDeleteTriviallyDeadInstructions utility function.

This makes LSR more aggressive about eliminating dead PHI cycles;
adjust tests to either be less trivial or to simply expect fewer
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70636 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-05-02 18:29:22 +00:00
parent fb7d35f22a
commit afc36a9520
9 changed files with 121 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/Transforms/LoopStrengthReduce/pr2570.ll
+1 -1
View File
@@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep {phi\\>} | count 14
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep {phi\\>} | count 10
; PR2570
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"