llvm-6502/test/Transforms/LoopVectorize/vectorize-once.ll
Paul Redmond ee21b6f7b4 Add support for llvm.vectorizer metadata
- llvm.loop.parallel metadata has been renamed to llvm.loop to be more generic
  by making the root of additional loop metadata.
  - Loop::isAnnotatedParallel now looks for llvm.loop and associated
    llvm.mem.parallel_loop_access
  - document llvm.loop and update llvm.mem.parallel_loop_access
- add support for llvm.vectorizer.width and llvm.vectorizer.unroll
  - document llvm.vectorizer.* metadata
  - add utility class LoopVectorizerHints for getting/setting loop metadata
  - use llvm.vectorizer.width=1 to indicate already vectorized instead of
    already_vectorized
- update existing tests that used llvm.loop.parallel and
  llvm.vectorizer.already_vectorized

Reviewed by: Nadav Rotem


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182802 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-28 20:00:34 +00:00

77 lines
3.2 KiB
LLVM

; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S -simplifycfg | 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"
;
; We want to make sure that we are vectorizeing the scalar loop only once
; even if the pass manager runs the vectorizer multiple times due to inlining.
; This test checks that we add metadata to vectorized loops
; CHECK: _Z4foo1Pii
; CHECK: <4 x i32>
; CHECK: llvm.loop
; CHECK: ret
; This test comes from the loop:
;
;int foo (int *A, int n) {
; return std::accumulate(A, A + n, 0);
;}
define i32 @_Z4foo1Pii(i32* %A, i32 %n) #0 {
entry:
%idx.ext = sext i32 %n to i64
%add.ptr = getelementptr inbounds i32* %A, i64 %idx.ext
%cmp3.i = icmp eq i32 %n, 0
br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
for.body.i: ; preds = %entry, %for.body.i
%__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
%__first.addr.04.i = phi i32* [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
%0 = load i32* %__first.addr.04.i, align 4
%add.i = add nsw i32 %0, %__init.addr.05.i
%incdec.ptr.i = getelementptr inbounds i32* %__first.addr.04.i, i64 1
%cmp.i = icmp eq i32* %incdec.ptr.i, %add.ptr
br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
_ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
%__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
ret i32 %__init.addr.0.lcssa.i
}
; This test checks that we don't vectorize loops that are marked with the "width" == 1 metadata.
; CHECK: _Z4foo2Pii
; CHECK-NOT: <4 x i32>
; CHECK: llvm.loop
; CHECK: ret
define i32 @_Z4foo2Pii(i32* %A, i32 %n) #0 {
entry:
%idx.ext = sext i32 %n to i64
%add.ptr = getelementptr inbounds i32* %A, i64 %idx.ext
%cmp3.i = icmp eq i32 %n, 0
br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
for.body.i: ; preds = %entry, %for.body.i
%__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
%__first.addr.04.i = phi i32* [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
%0 = load i32* %__first.addr.04.i, align 4
%add.i = add nsw i32 %0, %__init.addr.05.i
%incdec.ptr.i = getelementptr inbounds i32* %__first.addr.04.i, i64 1
%cmp.i = icmp eq i32* %incdec.ptr.i, %add.ptr
br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i, !llvm.loop !0
_ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
%__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
ret i32 %__init.addr.0.lcssa.i
}
attributes #0 = { nounwind readonly ssp uwtable "fp-contract-model"="standard" "no-frame-pointer-elim" "no-frame-pointer-elim-non-leaf" "realign-stack" "relocation-model"="pic" "ssp-buffers-size"="8" }
; CHECK: !0 = metadata !{metadata !0, metadata !1}
; CHECK: !1 = metadata !{metadata !"llvm.vectorizer.width", i32 1}
; CHECK: !2 = metadata !{metadata !2, metadata !1}
!0 = metadata !{metadata !0, metadata !1}
!1 = metadata !{metadata !"llvm.vectorizer.width", i32 1}