mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-24 13:06:56 +00:00
[vectorizer] Add an override for the target instruction cost and use it
to stabilize a test that really is trying to test generic behavior and not a specific target's behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200215 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
91a3f1dc8e
commit
1c4746ed70
@ -160,6 +160,12 @@ static cl::opt<unsigned> ForceTargetMaxVectorUnrollFactor(
|
||||
cl::desc("A flag that overrides the target's max unroll factor for "
|
||||
"vectorized loops."));
|
||||
|
||||
static cl::opt<unsigned> ForceTargetInstructionCost(
|
||||
"force-target-instruction-cost", cl::init(0), cl::Hidden,
|
||||
cl::desc("A flag that overrides the target's expected cost for "
|
||||
"an instruction to a single constant value. Mostly "
|
||||
"useful for getting consistent testing."));
|
||||
|
||||
static cl::opt<unsigned> SmallLoopCost(
|
||||
"small-loop-cost", cl::init(20), cl::Hidden,
|
||||
cl::desc("The cost of a loop that is considered 'small' by the unroller."));
|
||||
@ -5185,6 +5191,11 @@ unsigned LoopVectorizationCostModel::expectedCost(unsigned VF) {
|
||||
continue;
|
||||
|
||||
unsigned C = getInstructionCost(it, VF);
|
||||
|
||||
// Check if we should override the cost.
|
||||
if (ForceTargetInstructionCost.getNumOccurrences() > 0)
|
||||
C = ForceTargetInstructionCost;
|
||||
|
||||
BlockCost += C;
|
||||
DEBUG(dbgs() << "LV: Found an estimated cost of " << C << " for VF " <<
|
||||
VF << " For instruction: " << *it << '\n');
|
||||
|
@ -1,4 +1,4 @@
|
||||
; RUN: opt < %s -loop-vectorize -force-vector-width=1 -force-target-num-scalar-regs=16 -force-target-max-scalar-unroll=8 -small-loop-cost=20 -dce -instcombine -S | FileCheck %s
|
||||
; RUN: opt < %s -loop-vectorize -force-vector-width=1 -force-target-num-scalar-regs=16 -force-target-max-scalar-unroll=8 -force-target-instruction-cost=1 -small-loop-cost=40 -dce -instcombine -S | FileCheck %s
|
||||
|
||||
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
||||
target triple = "x86_64-apple-macosx10.8.0"
|
||||
|
Loading…
Reference in New Issue
Block a user