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Revert the main portion of r31856. It was causing BranchFolding

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to break up CFG diamonds by banishing one of the blocks to the end of
the function, which is bad for code density and branch size.

This does pessimize MultiSource/Benchmarks/Ptrdist/yacr2, the
benchmark cited as the reason for the change, however I've examined
the code and it looks more like a case of gaming a particular
branch than of being generally applicable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84803 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-10-22 00:03:58 +00:00
parent 49708ad993
commit 6d31268a7d
4 changed files with 14 additions and 14 deletions
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2
test/CodeGen/CellSPU/2009-01-01-BrCond.ll
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@@ -1,4 +1,4 @@
; RUN: llc < %s -march=cellspu -o - | grep brz
; RUN: llc < %s -march=cellspu -o - | grep brnz
; PR3274
target datalayout = "E-p:32:32:128-i1:8:128-i8:8:128-i16:16:128-i32:32:128-i64:32:128-f32:32:128-f64:64:128-v64:64:64-v128:128:128-a0:0:128-s0:128:128"