| ; RUN: llc -O3 -o - %s | FileCheck %s | |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" | |
| target triple = "x86_64-unknown-linux-gnu" | |
| ; Function Attrs: uwtable | |
| ; When tail-duplicating during placement, we work backward from blocks with | |
| ; multiple successors. In this case, the block dup1 gets duplicated into dup2 | |
| ; and if.then64, and then the block dup2 gets duplicated into land.lhs.true | |
| ; and if.end70 | |
| ; CHECK-LABEL: repeated_tail_dup: | |
| define void @repeated_tail_dup(i1 %a1, i1 %a2, i32* %a4, i32* %a5, i8* %a6) #0 align 2 { | |
| entry: | |
| br label %for.cond | |
| ; CHECK: {{^}}.[[HEADER:LBB0_[1-9]]]: # %for.cond | |
| for.cond: ; preds = %dup1, %entry | |
| br i1 %a1, label %land.lhs.true, label %if.end56 | |
| land.lhs.true: ; preds = %for.cond | |
| store i32 10, i32* %a4, align 8 | |
| br label %dup2 | |
| if.end56: ; preds = %for.cond | |
| br i1 %a2, label %if.then64, label %if.end70 | |
| if.then64: ; preds = %if.end56 | |
| store i8 1, i8* %a6, align 1 | |
| br label %dup1 | |
| ; CHECK: # %if.end70 | |
| ; CHECK-NEXT: # in Loop: | |
| ; CHECK-NEXT: movl $12, (%rdx) | |
| ; CHECK-NEXT: movl $2, (%rcx) | |
| ; CHECK-NEXT: testl %eax, %eax | |
| ; CHECK-NEXT: je .[[HEADER]] | |
| if.end70: ; preds = %if.end56 | |
| store i32 12, i32* %a4, align 8 | |
| br label %dup2 | |
| dup2: ; preds = %if.end70, %land.lhs.true | |
| store i32 2, i32* %a5, align 4 | |
| br label %dup1 | |
| dup1: ; preds = %dup2, %if.then64 | |
| %val = load i32, i32* %a4, align 8 | |
| %switch = icmp ult i32 undef, 1 | |
| br i1 %switch, label %for.cond, label %for.end | |
| for.end: ; preds = %dup1 | |
| ret void | |
| } | |
| attributes #0 = { uwtable } |