1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -debug-entry-values | FileCheck %s 3 4; Function Attrs: uwtable 5; When tail-duplicating during placement, we work backward from blocks with 6; multiple successors. In this case, the block dup1 gets duplicated into dup2 7; and if.then64, and then the block dup2 gets duplicated into land.lhs.true 8; and if.end70 9 10define void @repeated_tail_dup(i1 %a1, i1 %a2, i32* %a4, i32* %a5, i8* %a6, i32 %a7) #0 align 2 { 11; CHECK-LABEL: repeated_tail_dup: 12; CHECK: # %bb.0: # %entry 13; CHECK-NEXT: jmp .LBB0_1 14; CHECK-NEXT: .p2align 4, 0x90 15; CHECK-NEXT: .LBB0_2: # %land.lhs.true 16; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 17; CHECK-NEXT: movl $10, (%rdx) 18; CHECK-NEXT: .LBB0_6: # %dup2 19; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 20; CHECK-NEXT: movl $2, (%rcx) 21; CHECK-NEXT: testl %r9d, %r9d 22; CHECK-NEXT: jne .LBB0_8 23; CHECK-NEXT: .LBB0_1: # %for.cond 24; CHECK-NEXT: # =>This Inner Loop Header: Depth=1 25; CHECK-NEXT: testb $1, %dil 26; CHECK-NEXT: jne .LBB0_2 27; CHECK-NEXT: # %bb.3: # %if.end56 28; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 29; CHECK-NEXT: testb $1, %sil 30; CHECK-NEXT: je .LBB0_5 31; CHECK-NEXT: # %bb.4: # %if.then64 32; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 33; CHECK-NEXT: movb $1, (%r8) 34; CHECK-NEXT: testl %r9d, %r9d 35; CHECK-NEXT: je .LBB0_1 36; CHECK-NEXT: jmp .LBB0_8 37; CHECK-NEXT: .p2align 4, 0x90 38; CHECK-NEXT: .LBB0_5: # %if.end70 39; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 40; CHECK-NEXT: movl $12, (%rdx) 41; CHECK-NEXT: jmp .LBB0_6 42; CHECK-NEXT: .LBB0_8: # %for.end 43; CHECK-NEXT: retq 44entry: 45 br label %for.cond 46 47for.cond: ; preds = %dup1, %entry 48 br i1 %a1, label %land.lhs.true, label %if.end56 49 50land.lhs.true: ; preds = %for.cond 51 store i32 10, i32* %a4, align 8 52 br label %dup2 53 54if.end56: ; preds = %for.cond 55 br i1 %a2, label %if.then64, label %if.end70 56 57if.then64: ; preds = %if.end56 58 store i8 1, i8* %a6, align 1 59 br label %dup1 60 61if.end70: ; preds = %if.end56 62 store i32 12, i32* %a4, align 8 63 br label %dup2 64 65dup2: ; preds = %if.end70, %land.lhs.true 66 store i32 2, i32* %a5, align 4 67 br label %dup1 68 69dup1: ; preds = %dup2, %if.then64 70 %val = load i32, i32* %a4, align 8 71 %switch = icmp ult i32 %a7, 1 72 br i1 %switch, label %for.cond, label %for.end 73 74for.end: ; preds = %dup1 75 ret void 76} 77 78attributes #0 = { uwtable } 79