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LoopVectorize: Fix a bug in the scalarization of instructions.

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Before if-conversion we could check if a value is loop invariant
if it was declared inside the basic block. Now that loops have
multiple blocks this check is incorrect.

This fixes External/SPEC/CINT95/099_go/099_go



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170756 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2012-12-20 20:24:40 +00:00
parent 139e407d52
commit 8386acd734
2 changed files with 49 additions and 1 deletions
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2
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -284,7 +284,7 @@ void InnerLoopVectorizer::scalarizeInstruction(Instruction *Instr) {
// If the src is an instruction that appeared earlier in the basic block
// then it should already be vectorized.
if (SrcInst && SrcInst->getParent() == Instr->getParent()) {
if (SrcInst && OrigLoop->contains(SrcInst)) {
assert(WidenMap.count(SrcInst) && "Source operand is unavailable");
// The parameter is a vector value from earlier.
Params.push_back(WidenMap[SrcInst]);

48
test/Transforms/LoopVectorize/scalar-store.ll Normal file
View File

@ -0,0 +1,48 @@
; RUN: opt < %s -loop-vectorize -force-vector-width=4 -dce -instcombine -licm -S -enable-if-conversion | 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"
; When we scalarize a store, make sure that the addresses are extracted
; from a vector. We had a bug where the addresses were the old scalar
; addresses.
; CHECK: @foo
; CHECK: select
; CHECK: extractelement
; CHECK-NEXT: store
; CHECK: extractelement
; CHECK-NEXT: store
; CHECK: extractelement
; CHECK-NEXT: store
; CHECK: extractelement
; CHECK-NEXT: store
; CHECK: ret
define i32 @foo(i32* nocapture %a) nounwind uwtable ssp {
br label %1
; <label>:1 ; preds = %7, %0
%indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %7 ]
%2 = mul nsw i64 %indvars.iv, 7
%3 = getelementptr inbounds i32* %a, i64 %2
%4 = load i32* %3, align 4
%5 = icmp sgt i32 %4, 3
br i1 %5, label %6, label %7
; <label>:6 ; preds = %1
%tmp = add i32 %4, 4
%tmp1 = mul i32 %tmp, %4
br label %7
; <label>:7 ; preds = %6, %1
%x.0 = phi i32 [ %tmp1, %6 ], [ %4, %1 ]
%8 = add nsw i32 %x.0, 3
store i32 %8, i32* %3, 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, 256
br i1 %exitcond, label %9, label %1
; <label>:9 ; preds = %7
ret i32 0
}