6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-07 01:38:26 +00:00
Code Issues Projects Releases Wiki Activity

X86: Correct vectorization cost model for v8f32->v8i8.

Browse Source 
Fix the cost model to reflect the reality of our codegen.

rdar://16370633

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204880 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2014-03-27 00:04:11 +00:00
parent ce49ab2b05
commit f20d9ee6a6
2 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Target/X86/X86TargetTransformInfo.cpp
View File

@ -513,7 +513,7 @@ unsigned X86TTI::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src) const {
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i16, 2 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i32, 6 },
{ ISD::FP_TO_SINT, MVT::v8i8, MVT::v8f32, 1 },
{ ISD::FP_TO_SINT, MVT::v8i8, MVT::v8f32, 7 },
{ ISD::FP_TO_SINT, MVT::v4i8, MVT::v4f32, 1 },
};

24
test/Transforms/LoopVectorize/X86/fp_to_sint8-cost-model.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -S -debug-only=loop-vectorize 2>&1 | 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"
; CHECK: cost of 7 for VF 8 For instruction: %conv = fptosi float %tmp to i8
define void @float_to_sint8_cost(i8* noalias nocapture %a, float* noalias nocapture readonly %b) nounwind {
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv
%tmp = load float* %arrayidx, align 4
%conv = fptosi float %tmp to i8
%arrayidx2 = getelementptr inbounds i8* %a, i64 %indvars.iv
store i8 %conv, i8* %arrayidx2, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 256
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
}