1 ; RUN: opt < %s -loop-unroll -unroll-runtime=true -verify-dom-info -verify-loop-info -instcombine -S | FileCheck %s 2 ; RUN: opt < %s -loop-unroll -unroll-runtime=true -verify-dom-info -unroll-runtime-multi-exit=false -verify-loop-info -S | FileCheck %s -check-prefix=NOUNROLL 3 4 ; this tests when unrolling multiple exit loop occurs by default (i.e. without specifying -unroll-runtime-multi-exit) 5 6 ; the second exit block is a deopt block. The loop has one exiting block other than the latch. 7 define i32 @test1(i32* nocapture %a, i64 %n) { 8 ; CHECK-LABEL: test1( 9 ; CHECK-LABEL: header.epil: 10 ; CHECK-NEXT: %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ] 11 ; CHECK-LABEL: otherexit.loopexit: 12 ; CHECK-NEXT: %sum.02.lcssa.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %for.exiting_block.2 ], [ %add.2, %for.exiting_block.3 ], [ %add.3, %for.exiting_block.4 ], [ %add.4, %for.exiting_block.5 ], [ %add.5, %for.exiting_block.6 ], 13 ; CHECK-NEXT: br label %otherexit 14 ; CHECK-LABEL: otherexit.loopexit3: 15 ; CHECK-NEXT: br label %otherexit 16 ; CHECK-LABEL: otherexit: 17 ; CHECK-NEXT: %sum.02.lcssa = phi i32 [ %sum.02.lcssa.ph, %otherexit.loopexit ], [ %sum.02.epil, %otherexit.loopexit3 ] 18 ; CHECK-NEXT: %rval = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %sum.02.lcssa) ] 19 ; CHECK-NEXT: ret i32 %rval 20 ; CHECK-LABEL: latch.7: 21 ; CHECK: add i64 %indvars.iv, 8 22 23 ; NOUNROLL: test1( 24 ; NOUNROLL-NOT: .epil 25 ; NOUNROLL-NOT: .prol 26 ; NOUNROLL: otherexit: 27 ; NOUNROLL-NEXT: %sum.02.lcssa = phi i32 [ %sum.02, %for.exiting_block ] 28 ; NOUNROLL-NEXT: %rval = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %sum.02.lcssa) ] 29 entry: 30 br label %header 31 32 header: 33 %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ] 34 %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ] 35 br label %for.exiting_block 36 37 for.exiting_block: 38 %cmp = icmp eq i64 %n, 42 39 br i1 %cmp, label %otherexit, label %latch 40 41 latch: 42 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv 43 %0 = load i32, i32* %arrayidx, align 4 44 %add = add nsw i32 %0, %sum.02 45 %indvars.iv.next = add i64 %indvars.iv, 1 46 %exitcond = icmp eq i64 %indvars.iv.next, %n 47 br i1 %exitcond, label %latchexit, label %header 48 49 latchexit: ; preds = %latch 50 %sum.0.lcssa = phi i32 [ %add, %latch ] 51 ret i32 %sum.0.lcssa 52 53 otherexit: 54 %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %sum.02) ] 55 ret i32 %rval 56 } 57 58 ; the exit block is not a deopt block. 59 define i32 @test2(i32* nocapture %a, i64 %n) { 60 ; CHECK-LABEL: test2( 61 ; CHECK-NOT: .epil 62 ; CHECK-NOT: .prol 63 ; CHECK-LABEL: otherexit: 64 ; CHECK-NEXT: ret i32 %sum.02 65 66 entry: 67 br label %header 68 69 header: 70 %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ] 71 %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ] 72 br label %for.exiting_block 73 74 for.exiting_block: 75 %cmp = icmp eq i64 %n, 42 76 br i1 %cmp, label %otherexit, label %latch 77 78 latch: 79 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv 80 %0 = load i32, i32* %arrayidx, align 4 81 %add = add nsw i32 %0, %sum.02 82 %indvars.iv.next = add i64 %indvars.iv, 1 83 %exitcond = icmp eq i64 %indvars.iv.next, %n 84 br i1 %exitcond, label %latchexit, label %header 85 86 latchexit: ; preds = %latch 87 %sum.0.lcssa = phi i32 [ %add, %latch ] 88 ret i32 %sum.0.lcssa 89 90 otherexit: 91 %rval = phi i32 [%sum.02, %for.exiting_block ] 92 ret i32 %rval 93 } 94 declare i32 @llvm.experimental.deoptimize.i32(...) 95
