1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5 2; RUN: llc -mtriple=riscv64 -mcpu=sifive-p670 -O3 -verify-machineinstrs -riscv-enable-pipeliner=false < %s \ 3; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-NOT-PIPELINED 4; RUN: llc -mtriple=riscv64 -mcpu=sifive-p670 -O3 -verify-machineinstrs -riscv-enable-pipeliner=true < %s \ 5; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-PIPELINED 6 7; We shouldn't pipeline this loop as one operand of branch is a PHI. 8define i32 @test_phi() { 9; CHECK-LABEL: test_phi: 10; CHECK: # %bb.0: # %entry 11; CHECK-NEXT: li a0, 0 12; CHECK-NEXT: .LBB0_1: # %for.body 13; CHECK-NEXT: # =>This Inner Loop Header: Depth=1 14; CHECK-NEXT: mv a1, a0 15; CHECK-NEXT: li a0, 1 16; CHECK-NEXT: sh a0, 0(zero) 17; CHECK-NEXT: bnez a1, .LBB0_1 18; CHECK-NEXT: # %bb.2: # %for.cond.cleanup 19; CHECK-NEXT: li a0, 0 20; CHECK-NEXT: ret 21entry: 22 br label %for.body 23 24for.cond.cleanup: ; preds = %for.body 25 ret i32 0 26 27for.body: ; preds = %for.body, %entry 28 %indvars.iv1 = phi i64 [ 0, %entry ], [ 1, %for.body ] 29 store i16 1, ptr null, align 4 30 %exitcond.not.31 = icmp eq i64 %indvars.iv1, 0 31 br i1 %exitcond.not.31, label %for.cond.cleanup, label %for.body 32} 33 34define void @test_pipelined_1(ptr noalias %in, ptr noalias %out, i32 signext %cnt) { 35; CHECK-NOT-PIPELINED-LABEL: test_pipelined_1: 36; CHECK-NOT-PIPELINED: # %bb.0: # %entry 37; CHECK-NOT-PIPELINED-NEXT: blez a2, .LBB1_3 38; CHECK-NOT-PIPELINED-NEXT: # %bb.1: # %for.body.preheader 39; CHECK-NOT-PIPELINED-NEXT: addi a2, a2, -1 40; CHECK-NOT-PIPELINED-NEXT: sh2add.uw a2, a2, a1 41; CHECK-NOT-PIPELINED-NEXT: addi a2, a2, 4 42; CHECK-NOT-PIPELINED-NEXT: .LBB1_2: # %for.body 43; CHECK-NOT-PIPELINED-NEXT: # =>This Inner Loop Header: Depth=1 44; CHECK-NOT-PIPELINED-NEXT: lw a3, 0(a1) 45; CHECK-NOT-PIPELINED-NEXT: addi a1, a1, 4 46; CHECK-NOT-PIPELINED-NEXT: addi a3, a3, 1 47; CHECK-NOT-PIPELINED-NEXT: sw a3, 0(a0) 48; CHECK-NOT-PIPELINED-NEXT: addi a0, a0, 4 49; CHECK-NOT-PIPELINED-NEXT: bne a1, a2, .LBB1_2 50; CHECK-NOT-PIPELINED-NEXT: .LBB1_3: # %for.end 51; CHECK-NOT-PIPELINED-NEXT: ret 52; 53; CHECK-PIPELINED-LABEL: test_pipelined_1: 54; CHECK-PIPELINED: # %bb.0: # %entry 55; CHECK-PIPELINED-NEXT: blez a2, .LBB1_6 56; CHECK-PIPELINED-NEXT: # %bb.1: # %for.body.preheader 57; CHECK-PIPELINED-NEXT: lw a4, 0(a1) 58; CHECK-PIPELINED-NEXT: addi a2, a2, -1 59; CHECK-PIPELINED-NEXT: sh2add.uw a6, a2, a1 60; CHECK-PIPELINED-NEXT: addi a2, a0, 4 61; CHECK-PIPELINED-NEXT: addi a1, a1, 4 62; CHECK-PIPELINED-NEXT: addi a6, a6, 4 63; CHECK-PIPELINED-NEXT: beq a1, a6, .LBB1_5 64; CHECK-PIPELINED-NEXT: # %bb.2: # %for.body 65; CHECK-PIPELINED-NEXT: lw a5, 0(a1) 66; CHECK-PIPELINED-NEXT: addi a3, a2, 4 67; CHECK-PIPELINED-NEXT: addi a4, a4, 1 68; CHECK-PIPELINED-NEXT: addi a1, a1, 4 69; CHECK-PIPELINED-NEXT: beq a1, a6, .LBB1_4 70; CHECK-PIPELINED-NEXT: .LBB1_3: # %for.body 71; CHECK-PIPELINED-NEXT: # =>This Inner Loop Header: Depth=1 72; CHECK-PIPELINED-NEXT: sw a4, 0(a0) 73; CHECK-PIPELINED-NEXT: mv a4, a5 74; CHECK-PIPELINED-NEXT: lw a5, 0(a1) 75; CHECK-PIPELINED-NEXT: mv a0, a2 76; CHECK-PIPELINED-NEXT: mv a2, a3 77; CHECK-PIPELINED-NEXT: addi a3, a3, 4 78; CHECK-PIPELINED-NEXT: addi a4, a4, 1 79; CHECK-PIPELINED-NEXT: addi a1, a1, 4 80; CHECK-PIPELINED-NEXT: bne a1, a6, .LBB1_3 81; CHECK-PIPELINED-NEXT: .LBB1_4: 82; CHECK-PIPELINED-NEXT: sw a4, 0(a0) 83; CHECK-PIPELINED-NEXT: mv a0, a2 84; CHECK-PIPELINED-NEXT: mv a4, a5 85; CHECK-PIPELINED-NEXT: .LBB1_5: 86; CHECK-PIPELINED-NEXT: addi a4, a4, 1 87; CHECK-PIPELINED-NEXT: sw a4, 0(a0) 88; CHECK-PIPELINED-NEXT: .LBB1_6: # %for.end 89; CHECK-PIPELINED-NEXT: ret 90entry: 91 %cmp = icmp sgt i32 %cnt, 0 92 br i1 %cmp, label %for.body, label %for.end 93 94for.body: ; preds = %entry, %for.body 95 %inc.next = phi i32 [ %inc, %for.body ], [ 0, %entry ] 96 %in.addr.next = phi ptr [ %incdec.in, %for.body ], [ %in, %entry ] 97 %out.addr.next = phi ptr [ %incdec.out, %for.body ], [ %out, %entry ] 98 %0 = load i32, ptr %out.addr.next, align 4 99 %1 = add i32 %0, 1 100 store i32 %1, ptr %in.addr.next, align 4 101 %incdec.in = getelementptr inbounds i8, ptr %in.addr.next, i64 4 102 %incdec.out = getelementptr inbounds i8, ptr %out.addr.next, i64 4 103 %inc = add nuw nsw i32 %inc.next, 1 104 %exitcond.not = icmp eq i32 %inc, %cnt 105 br i1 %exitcond.not, label %for.end, label %for.body 106 107for.end: ; preds = %for.body, %entry 108 ret void 109} 110