mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
0097e15502
When a dependence check fails we can still try to vectorize loops with runtime array bounds checks. This helps linpack to vectorize a loop in dgefa. And we are back to 2x of the scalar performance on a corei7-avx. radar://15339680 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193853 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.4 KiB
LLVM
65 lines
2.4 KiB
LLVM
; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -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-macosx10.9.0"
|
|
|
|
; Make sure we vectorize this loop:
|
|
; int foo(float *a, float *b, int n) {
|
|
; for (int i=0; i<n; ++i)
|
|
; a[i] = b[i] * 3;
|
|
; }
|
|
|
|
;CHECK: for.body.preheader:
|
|
;CHECK: br i1 %cmp.zero, label %middle.block, label %vector.memcheck
|
|
;CHECK: vector.memcheck:
|
|
;CHECK: br i1 %memcheck.conflict, label %middle.block, label %vector.ph
|
|
;CHECK: load <4 x float>
|
|
define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp {
|
|
entry:
|
|
%cmp6 = icmp sgt i32 %n, 0
|
|
br i1 %cmp6, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
|
|
%arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv
|
|
%0 = load float* %arrayidx, align 4
|
|
%mul = fmul float %0, 3.000000e+00
|
|
%arrayidx2 = getelementptr inbounds float* %a, i64 %indvars.iv
|
|
store float %mul, float* %arrayidx2, align 4
|
|
%indvars.iv.next = add i64 %indvars.iv, 1
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body, %entry
|
|
ret i32 undef
|
|
}
|
|
|
|
; Make sure that we try to vectorize loops with a runtime check if the
|
|
; dependency check fails.
|
|
|
|
; CHECK-LABEL: test_runtime_check
|
|
; CHECK: <4 x float>
|
|
define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
|
|
%ind.sum = add i64 %iv, %offset
|
|
%arr.idx = getelementptr inbounds float* %a, i64 %ind.sum
|
|
%l1 = load float* %arr.idx, align 4
|
|
%ind.sum2 = add i64 %iv, %offset2
|
|
%arr.idx2 = getelementptr inbounds float* %a, i64 %ind.sum2
|
|
%l2 = load float* %arr.idx2, align 4
|
|
%m = fmul fast float %b, %l2
|
|
%ad = fadd fast float %l1, %m
|
|
store float %ad, float* %arr.idx, align 4
|
|
%iv.next = add nuw nsw i64 %iv, 1
|
|
%exitcond = icmp eq i64 %iv.next, %n
|
|
br i1 %exitcond, label %loopexit, label %for.body
|
|
|
|
loopexit:
|
|
ret void
|
|
}
|