• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1; RUN: llvm-profdata merge %S/Inputs/select2.proftext -o %t.profdata
2; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -pgo-instr-select=true -S | FileCheck %s --check-prefix=USE
3; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -pgo-instr-select=true -S | FileCheck %s --check-prefix=USE
4
5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6target triple = "x86_64-unknown-linux-gnu"
7
8define i32 @foo(i32 %n) {
9;USE: define i32 @foo(i32 %n) !prof ![[ENTRY_COUNT:[0-9]+]] {
10entry:
11  br label %for.cond
12
13for.cond:
14  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
15  %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
16  %cmp = icmp slt i32 %i.0, %n
17  br i1 %cmp, label %for.body, label %for.end
18;USE:  br i1 %cmp, label %for.body, label %for.end, !prof ![[BW_FOR_BR:[0-9]+]]
19
20for.body:
21  %cmp1 = icmp sgt i32 %sum.0, 10
22  %cond = select i1 %cmp1, i32 20, i32 -10
23;USE:  %cond = select i1 %cmp1, i32 20, i32 -10, !prof ![[BW_FOR_SELECT:[0-9]+]]
24  %add = add nsw i32 %sum.0, %cond
25  br label %for.inc
26
27for.inc:
28  %inc = add nsw i32 %i.0, 1
29  br label %for.cond
30
31for.end:
32  ret i32 %sum.0
33}
34
35;USE: ![[ENTRY_COUNT]] = !{!"function_entry_count", i64 3}
36;USE: ![[BW_FOR_BR]] = !{!"branch_weights", i32 800, i32 3}
37;USE: ![[BW_FOR_SELECT]] = !{!"branch_weights", i32 300, i32 500}
38