fix PR3995. A scale must be 1, 2, 4 or 8.
llvm-svn: 69284
This commit is contained in:
parent
092f0ccd9c
commit
5e42177a0f
|
@ -1041,7 +1041,7 @@ bool X86DAGToDAGISel::MatchAddress(SDValue N, X86ISelAddressMode &AM,
|
|||
// a scaled index.
|
||||
if (Shift.getOpcode() == ISD::SRL && Shift.hasOneUse()) {
|
||||
unsigned ScaleLog = 8 - C1->getZExtValue();
|
||||
if (ScaleLog > 0 && ScaleLog < 64 &&
|
||||
if (ScaleLog > 0 && ScaleLog < 4 &&
|
||||
C2->getZExtValue() == (UINT64_C(0xff) << ScaleLog)) {
|
||||
SDValue Eight = CurDAG->getConstant(8, MVT::i8);
|
||||
SDValue Mask = CurDAG->getConstant(0xff, N.getValueType());
|
||||
|
|
|
@ -0,0 +1,23 @@
|
|||
; RUN: llvm-as < %s | llc -march=x86 -mtriple=i386-unknown-linux-gnu
|
||||
; PR3995
|
||||
|
||||
%struct.vtable = type { i32 (...)** }
|
||||
%struct.array = type { %struct.impl, [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair] }
|
||||
%struct.impl = type { %struct.vtable, i8, %struct.impl*, i32, i32, i64, i64 }
|
||||
%struct.pair = type { i64, i64 }
|
||||
|
||||
define void @test() {
|
||||
entry:
|
||||
%0 = load i32* null, align 4 ; <i32> [#uses=1]
|
||||
%1 = lshr i32 %0, 8 ; <i32> [#uses=1]
|
||||
%2 = and i32 %1, 255 ; <i32> [#uses=1]
|
||||
%3 = getelementptr %struct.array* null, i32 0, i32 3 ; <[256 x %struct.pair]*> [#uses=1]
|
||||
%4 = getelementptr [256 x %struct.pair]* %3, i32 0, i32 %2 ; <%struct.pair*> [#uses=1]
|
||||
%5 = getelementptr %struct.pair* %4, i32 0, i32 1 ; <i64*> [#uses=1]
|
||||
%6 = load i64* %5, align 4 ; <i64> [#uses=1]
|
||||
%7 = xor i64 0, %6 ; <i64> [#uses=1]
|
||||
%8 = xor i64 %7, 0 ; <i64> [#uses=1]
|
||||
%9 = xor i64 %8, 0 ; <i64> [#uses=1]
|
||||
store i64 %9, i64* null, align 8
|
||||
unreachable
|
||||
}
|
Loading…
Reference in New Issue