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Add support for pointer induction variables even when there is no integer induction variable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168558 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2012-11-25 08:41:35 +00:00
parent 327e4cba09
commit 0af63ac245
2 changed files with 213 additions and 103 deletions
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test/Transforms/LoopVectorize/no_int_induction.ll
+33
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; RUN: opt < %s -loop-vectorize -force-vector-width=4 -dce -instcombine -licm -S | FileCheck %s
; int __attribute__((noinline)) sum_array(int *A, int n) {
; return std::accumulate(A, A + n, 0);
; }
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: @sum_array
;CHECK: phi <4 x i32>
;CHECK: load <4 x i32>
;CHECK: add nsw <4 x i32>
;CHECK: ret i32
define i32 @sum_array(i32* %A, i32 %n) nounwind uwtable readonly noinline ssp {
%1 = sext i32 %n to i64
%2 = getelementptr inbounds i32* %A, i64 %1
%3 = icmp eq i32 %n, 0
br i1 %3, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %.lr.ph.i
.lr.ph.i: ; preds = %0, %.lr.ph.i
%.03.i = phi i32* [ %6, %.lr.ph.i ], [ %A, %0 ]
%.012.i = phi i32 [ %5, %.lr.ph.i ], [ 0, %0 ]
%4 = load i32* %.03.i, align 4
%5 = add nsw i32 %4, %.012.i
%6 = getelementptr inbounds i32* %.03.i, i64 1
%7 = icmp eq i32* %6, %2
br i1 %7, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %.lr.ph.i
_ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %.lr.ph.i, %0
%.01.lcssa.i = phi i32 [ 0, %0 ], [ %5, %.lr.ph.i ]
ret i32 %.01.lcssa.i
}