6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-21 06:30:16 +00:00
Code Issues Projects Releases Wiki Activity

[DAGCombiner] Account for getVectorIdxTy() when narrowing vector load

Browse Source 
This patch makes ReplaceExtractVectorEltOfLoadWithNarrowedLoad convert
the element number from getVectorIdxTy() to PtrTy before doing pointer
arithmetic on it.  This is needed on z, where element numbers are i32
but pointers are i64.

Original patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236530 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ulrich Weigand 2015-05-05 19:34:10 +00:00
parent d32c49bf68
commit 97dbeaa8d5
2 changed files with 18 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -11416,9 +11416,10 @@ SDValue DAGCombiner::ReplaceExtractVectorEltOfLoadWithNarrowedLoad(
Offset = DAG.getConstant(PtrOff, DL, PtrType);
MPI = OriginalLoad->getPointerInfo().getWithOffset(PtrOff);
} else {
Offset = DAG.getZExtOrTrunc(EltNo, DL, PtrType);
Offset = DAG.getNode(
ISD::MUL, DL, EltNo.getValueType(), EltNo,
DAG.getConstant(VecEltVT.getStoreSize(), DL, EltNo.getValueType()));
ISD::MUL, DL, PtrType, Offset,
DAG.getConstant(VecEltVT.getStoreSize(), DL, PtrType));
MPI = OriginalLoad->getPointerInfo();
}
NewPtr = DAG.getNode(ISD::ADD, DL, PtrType, NewPtr, Offset);

15
test/CodeGen/SystemZ/vec-extract-02.ll Normal file
View File

@ -0,0 +1,15 @@
; Verify ReplaceExtractVectorEltOfLoadWithNarrowedLoad fixes
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
; Test a case where a vector extraction can be simplified to a scalar load.
; The index must be extended from i32 to i64.
define i32 @f1(<4 x i32> *%ptr, i32 %index) {
; CHECK-LABEL: f1:
; CHECK: risbg {{%r[0-5]}}, %r3, 30, 189, 2
; CHECK: l %r2,
; CHECK: br %r14
%vec = load <4 x i32>, <4 x i32> *%ptr
%res = extractelement <4 x i32> %vec, i32 %index
ret i32 %res
}