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| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-17 23:38:41 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-17 23:38:41 +0000 |
| commit | c0541dfa3e8b6e047e11edba3d6f9bc134dbb1a8 (patch) | |
| tree | 913ebb6143ea6da58eeec33fb0a95389f857f450 | |
| parent | 1fae3ae6f0e82a1c174ec5dc19ca9bf43418efa9 (diff) | |
| download | bcm5719-llvm-c0541dfa3e8b6e047e11edba3d6f9bc134dbb1a8.tar.gz bcm5719-llvm-c0541dfa3e8b6e047e11edba3d6f9bc134dbb1a8.zip | |
Increase tail dup threshold for -O3 from 3 to 4.
We see a modest performance improvement from this slightly higher tail dup threshold.
Differential Revision: https://reviews.llvm.org/D36775
llvm-svn: 311139
| -rw-r--r-- | llvm/lib/CodeGen/MachineBlockPlacement.cpp | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Mips/brconge.ll | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Mips/brconle.ll | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/tail-dup-repeat.ll | 2 |
4 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/MachineBlockPlacement.cpp b/llvm/lib/CodeGen/MachineBlockPlacement.cpp index 374b3079c34..65330308dad 100644 --- a/llvm/lib/CodeGen/MachineBlockPlacement.cpp +++ b/llvm/lib/CodeGen/MachineBlockPlacement.cpp @@ -143,7 +143,7 @@ static cl::opt<unsigned> TailDupPlacementAggressiveThreshold( "tail-dup-placement-aggressive-threshold", cl::desc("Instruction cutoff for aggressive tail duplication during " "layout. Used at -O3. Tail merging during layout is forced to " - "have a threshold that won't conflict."), cl::init(3), + "have a threshold that won't conflict."), cl::init(4), cl::Hidden); // Heuristic for tail duplication. diff --git a/llvm/test/CodeGen/Mips/brconge.ll b/llvm/test/CodeGen/Mips/brconge.ll index f3f059ff2d5..910d81c5689 100644 --- a/llvm/test/CodeGen/Mips/brconge.ll +++ b/llvm/test/CodeGen/Mips/brconge.ll @@ -1,4 +1,4 @@ -; RUN: llc -march=mipsel -mattr=mips16 -relocation-model=pic -O3 < %s | FileCheck %s -check-prefix=16 +; RUN: llc -march=mipsel -mattr=mips16 -relocation-model=pic -O2 < %s | FileCheck %s -check-prefix=16 @i = global i32 5, align 4 @j = global i32 10, align 4 diff --git a/llvm/test/CodeGen/Mips/brconle.ll b/llvm/test/CodeGen/Mips/brconle.ll index 99599f84db1..4267dc985de 100644 --- a/llvm/test/CodeGen/Mips/brconle.ll +++ b/llvm/test/CodeGen/Mips/brconle.ll @@ -1,4 +1,4 @@ -; RUN: llc -march=mipsel -mattr=mips16 -relocation-model=pic -O3 < %s | FileCheck %s -check-prefix=16 +; RUN: llc -march=mipsel -mattr=mips16 -relocation-model=pic -O2 < %s | FileCheck %s -check-prefix=16 @i = global i32 -5, align 4 @j = global i32 10, align 4 diff --git a/llvm/test/CodeGen/X86/tail-dup-repeat.ll b/llvm/test/CodeGen/X86/tail-dup-repeat.ll index 7d9c0908e57..d635565c88c 100644 --- a/llvm/test/CodeGen/X86/tail-dup-repeat.ll +++ b/llvm/test/CodeGen/X86/tail-dup-repeat.ll @@ -1,4 +1,4 @@ -; RUN: llc -O3 -tail-dup-placement-threshold=4 -o - %s | FileCheck %s +; RUN: llc -O3 -o - %s | FileCheck %s target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" |
