1 ; RUN: rm -rf %t && split-file %s %t
3 ; RUN: llvm-profdata merge %t/main.proftext -o %t/main.profdata
4 ; RUN: opt < %t/main.ll -passes=pgo-instr-use -pgo-test-profile-file=%t/main.profdata -S | FileCheck %s
8 ; Instrumentation PGO sampling makes corrupt looking counters possible. This
9 ; tests one extreme case:
10 ; Test loading zero profile counts for all instrumented blocks while the entry
11 ; block is not instrumented. Additionally include a non-zero profile count for
12 ; a select instruction, which prevents short circuiting the PGO application.
14 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
15 target triple = "x86_64-unknown-linux-gnu"
17 define i32 @test_no_entry_block_counter(i32 %n) {
18 ; CHECK: define i32 @test_no_entry_block_counter(i32 %n)
19 ; CHECK-SAME: !prof ![[ENTRY_COUNT:[0-9]*]]
21 %cmp = icmp slt i32 42, %n
22 br i1 %cmp, label %tail1, label %tail2
24 %ret = select i1 true, i32 %n, i32 42
25 ; CHECK: %ret = select i1 true, i32 %n, i32 42
26 ; CHECK-SAME: !prof ![[BW_FOR_SELECT:[0-9]+]]
31 ; CHECK: ![[ENTRY_COUNT]] = !{!"function_entry_count", i64 1}
32 ; CHECK: ![[BW_FOR_SELECT]] = !{!"branch_weights", i32 1, i32 0}
36 test_no_entry_block_counter