1 ; Test fix for PR-13709. 2 ; RUN: llc -march=hexagon -mcpu=hexagonv4 < %s | FileCheck %s 3 ; CHECK: foo 4 ; CHECK-NOT: lsr(r{{[0-9]+}}:{{[0-9]+}}, #32) 5 ; CHECK-NOT: lsr(r{{[0-9]+}}:{{[0-9]+}}, #32) 6 7 ; Convert the sequence 8 ; r17:16 = lsr(r11:10, #32) 9 ; .. = r16 10 ; into 11 ; r17:16 = lsr(r11:10, #32) 12 ; .. = r11 13 ; This makes the lsr instruction dead and it gets removed subsequently 14 ; by a dead code removal pass. 15 16 %union.vect64 = type { i64 } 17 %union.vect32 = type { i32 } 18 19 define void @foo(%union.vect64* nocapture %sss_extracted_bit_rx_data_ptr, 20 %union.vect32* nocapture %s_even, %union.vect32* nocapture %s_odd, 21 i8* nocapture %scr_s_even_code_ptr, i8* nocapture %scr_s_odd_code_ptr) 22 nounwind { 23 entry: 24 %scevgep = getelementptr %union.vect64, %union.vect64* %sss_extracted_bit_rx_data_ptr, i32 1 25 %scevgep28 = getelementptr %union.vect32, %union.vect32* %s_odd, i32 1 26 %scevgep32 = getelementptr %union.vect32, %union.vect32* %s_even, i32 1 27 %scevgep36 = getelementptr i8, i8* %scr_s_odd_code_ptr, i32 1 28 %scevgep39 = getelementptr i8, i8* %scr_s_even_code_ptr, i32 1 29 br label %for.body 30 31 for.body: ; preds = %for.body, %entry 32 %lsr.iv42 = phi i32 [ %lsr.iv.next, %for.body ], [ 2, %entry ] 33 %lsr.iv40 = phi i8* [ %scevgep41, %for.body ], [ %scevgep39, %entry ] 34 %lsr.iv37 = phi i8* [ %scevgep38, %for.body ], [ %scevgep36, %entry ] 35 %lsr.iv33 = phi %union.vect32* [ %scevgep34, %for.body ], [ %scevgep32, %entry ] 36 %lsr.iv29 = phi %union.vect32* [ %scevgep30, %for.body ], [ %scevgep28, %entry ] 37 %lsr.iv = phi %union.vect64* [ %scevgep26, %for.body ], [ %scevgep, %entry ] 38 %predicate_1.023 = phi i8 [ undef, %entry ], [ %10, %for.body ] 39 %predicate.022 = phi i8 [ undef, %entry ], [ %9, %for.body ] 40 %val.021 = phi i64 [ undef, %entry ], [ %srcval, %for.body ] 41 %lsr.iv3335 = bitcast %union.vect32* %lsr.iv33 to i32* 42 %lsr.iv2931 = bitcast %union.vect32* %lsr.iv29 to i32* 43 %lsr.iv27 = bitcast %union.vect64* %lsr.iv to i64* 44 %0 = tail call i64 @llvm.hexagon.A2.vsubhs(i64 0, i64 %val.021) 45 %conv3 = sext i8 %predicate.022 to i32 46 %1 = trunc i64 %val.021 to i32 47 %2 = trunc i64 %0 to i32 48 %3 = tail call i32 @llvm.hexagon.C2.mux(i32 %conv3, i32 %1, i32 %2) 49 store i32 %3, i32* %lsr.iv3335, align 4 50 %conv8 = sext i8 %predicate_1.023 to i32 51 %4 = lshr i64 %val.021, 32 52 %5 = trunc i64 %4 to i32 53 %6 = lshr i64 %0, 32 54 %7 = trunc i64 %6 to i32 55 %8 = tail call i32 @llvm.hexagon.C2.mux(i32 %conv8, i32 %5, i32 %7) 56 store i32 %8, i32* %lsr.iv2931, align 4 57 %srcval = load i64, i64* %lsr.iv27, align 8 58 %9 = load i8, i8* %lsr.iv40, align 1 59 %10 = load i8, i8* %lsr.iv37, align 1 60 %lftr.wideiv = trunc i32 %lsr.iv42 to i8 61 %exitcond = icmp eq i8 %lftr.wideiv, 32 62 %scevgep26 = getelementptr %union.vect64, %union.vect64* %lsr.iv, i32 1 63 %scevgep30 = getelementptr %union.vect32, %union.vect32* %lsr.iv29, i32 1 64 %scevgep34 = getelementptr %union.vect32, %union.vect32* %lsr.iv33, i32 1 65 %scevgep38 = getelementptr i8, i8* %lsr.iv37, i32 1 66 %scevgep41 = getelementptr i8, i8* %lsr.iv40, i32 1 67 %lsr.iv.next = add i32 %lsr.iv42, 1 68 br i1 %exitcond, label %for.end, label %for.body 69 70 for.end: ; preds = %for.body 71 ret void 72 } 73 74 declare i64 @llvm.hexagon.A2.vsubhs(i64, i64) nounwind readnone 75 76 declare i32 @llvm.hexagon.C2.mux(i32, i32, i32) nounwind readnone 77
