mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 23:31:32 +00:00
4c3d3ecdf8
subreg_hireg of register pair Rp.
* lib/Target/Hexagon/HexagonPeephole.cpp(PeepholeDoubleRegsMap): New
DenseMap similar to PeepholeMap that additionally records subreg info
too.
(runOnMachineFunction): Record information in PeepholeDoubleRegsMap
and copy propagate the high sub-reg of Rp0 in Rp1 = lsr(Rp0, #32) to
the instruction Rx = COPY Rp1:logreg_subreg.
* test/CodeGen/Hexagon/remove_lsr.ll: New test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163214 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
3.4 KiB
LLVM
81 lines
3.4 KiB
LLVM
; Test fix for PR-13709.
|
|
; RUN: llc -march=hexagon -mcpu=hexagonv4 < %s | FileCheck %s
|
|
; CHECK: foo
|
|
; CHECK-NOT: lsr(r{{[0-9]+}}:{{[0-9]+}}, #32)
|
|
; CHECK-NOT: lsr(r{{[0-9]+}}:{{[0-9]+}}, #32)
|
|
|
|
; Convert the sequence
|
|
; r17:16 = lsr(r11:10, #32)
|
|
; .. = r16
|
|
; into
|
|
; r17:16 = lsr(r11:10, #32)
|
|
; .. = r11
|
|
; This makes the lsr instruction dead and it gets removed subsequently
|
|
; by a dead code removal pass.
|
|
|
|
%union.vect64 = type { i64 }
|
|
%union.vect32 = type { i32 }
|
|
|
|
define void @foo(%union.vect64* nocapture %sss_extracted_bit_rx_data_ptr,
|
|
%union.vect32* nocapture %s_even, %union.vect32* nocapture %s_odd,
|
|
i8* nocapture %scr_s_even_code_ptr, i8* nocapture %scr_s_odd_code_ptr)
|
|
nounwind {
|
|
entry:
|
|
%scevgep = getelementptr %union.vect64* %sss_extracted_bit_rx_data_ptr, i32 1
|
|
%scevgep28 = getelementptr %union.vect32* %s_odd, i32 1
|
|
%scevgep32 = getelementptr %union.vect32* %s_even, i32 1
|
|
%scevgep36 = getelementptr i8* %scr_s_odd_code_ptr, i32 1
|
|
%scevgep39 = getelementptr i8* %scr_s_even_code_ptr, i32 1
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%lsr.iv42 = phi i32 [ %lsr.iv.next, %for.body ], [ 2, %entry ]
|
|
%lsr.iv40 = phi i8* [ %scevgep41, %for.body ], [ %scevgep39, %entry ]
|
|
%lsr.iv37 = phi i8* [ %scevgep38, %for.body ], [ %scevgep36, %entry ]
|
|
%lsr.iv33 = phi %union.vect32* [ %scevgep34, %for.body ], [ %scevgep32, %entry ]
|
|
%lsr.iv29 = phi %union.vect32* [ %scevgep30, %for.body ], [ %scevgep28, %entry ]
|
|
%lsr.iv = phi %union.vect64* [ %scevgep26, %for.body ], [ %scevgep, %entry ]
|
|
%predicate_1.023 = phi i8 [ undef, %entry ], [ %10, %for.body ]
|
|
%predicate.022 = phi i8 [ undef, %entry ], [ %9, %for.body ]
|
|
%val.021 = phi i64 [ undef, %entry ], [ %srcval, %for.body ]
|
|
%lsr.iv3335 = bitcast %union.vect32* %lsr.iv33 to i32*
|
|
%lsr.iv2931 = bitcast %union.vect32* %lsr.iv29 to i32*
|
|
%lsr.iv27 = bitcast %union.vect64* %lsr.iv to i64*
|
|
%0 = tail call i64 @llvm.hexagon.A2.vsubhs(i64 0, i64 %val.021)
|
|
%conv3 = sext i8 %predicate.022 to i32
|
|
%1 = trunc i64 %val.021 to i32
|
|
%2 = trunc i64 %0 to i32
|
|
%3 = tail call i32 @llvm.hexagon.C2.mux(i32 %conv3, i32 %1, i32 %2)
|
|
store i32 %3, i32* %lsr.iv3335, align 4, !tbaa !0
|
|
%conv8 = sext i8 %predicate_1.023 to i32
|
|
%4 = lshr i64 %val.021, 32
|
|
%5 = trunc i64 %4 to i32
|
|
%6 = lshr i64 %0, 32
|
|
%7 = trunc i64 %6 to i32
|
|
%8 = tail call i32 @llvm.hexagon.C2.mux(i32 %conv8, i32 %5, i32 %7)
|
|
store i32 %8, i32* %lsr.iv2931, align 4, !tbaa !0
|
|
%srcval = load i64* %lsr.iv27, align 8
|
|
%9 = load i8* %lsr.iv40, align 1, !tbaa !1
|
|
%10 = load i8* %lsr.iv37, align 1, !tbaa !1
|
|
%lftr.wideiv = trunc i32 %lsr.iv42 to i8
|
|
%exitcond = icmp eq i8 %lftr.wideiv, 32
|
|
%scevgep26 = getelementptr %union.vect64* %lsr.iv, i32 1
|
|
%scevgep30 = getelementptr %union.vect32* %lsr.iv29, i32 1
|
|
%scevgep34 = getelementptr %union.vect32* %lsr.iv33, i32 1
|
|
%scevgep38 = getelementptr i8* %lsr.iv37, i32 1
|
|
%scevgep41 = getelementptr i8* %lsr.iv40, i32 1
|
|
%lsr.iv.next = add i32 %lsr.iv42, 1
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
declare i64 @llvm.hexagon.A2.vsubhs(i64, i64) nounwind readnone
|
|
|
|
declare i32 @llvm.hexagon.C2.mux(i32, i32, i32) nounwind readnone
|
|
|
|
!0 = metadata !{metadata !"long", metadata !1}
|
|
!1 = metadata !{metadata !"omnipotent char", metadata !2}
|
|
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
|