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| author | Evan Cheng <evan.cheng@apple.com> | 2007-06-19 21:45:13 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-06-19 21:45:13 +0000 |
| commit | a955c02c9b689f429876181b4618980f42023ac2 (patch) | |
| tree | 0a1f6f6430c7f936e7e56eb4dd371f0dfc9e70f7 /llvm/lib/CodeGen | |
| parent | c3c949b473b8ceea221e23bfa6b162d00553785e (diff) | |
| download | bcm5719-llvm-a955c02c9b689f429876181b4618980f42023ac2.tar.gz bcm5719-llvm-a955c02c9b689f429876181b4618980f42023ac2.zip | |
Avoid if-converting simple block that ends with unconditional branch or fallthrough unless it branches / falls to the 'false' block. Not profitable, may end up increasing code size.
llvm-svn: 37660
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/IfConversion.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/IfConversion.cpp b/llvm/lib/CodeGen/IfConversion.cpp index 965cf6af191..64328d6e04f 100644 --- a/llvm/lib/CodeGen/IfConversion.cpp +++ b/llvm/lib/CodeGen/IfConversion.cpp @@ -399,6 +399,9 @@ bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups) const { if (TrueBBI.IsBeingAnalyzed || TrueBBI.IsDone) return false; + if (TrueBBI.IsBrAnalyzable) + return false; + if (TrueBBI.BB->pred_size() > 1) { if (TrueBBI.CannotBeCopied || TrueBBI.NonPredSize > TLI->getIfCvtDupBlockSizeLimit()) @@ -406,7 +409,7 @@ bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups) const { Dups = TrueBBI.NonPredSize; } - return !blockAlwaysFallThrough(TrueBBI) && TrueBBI.BrCond.size() == 0; + return true; } /// ValidTriangle - Returns true if the 'true' and 'false' blocks (along |
