File: select1.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (31 lines) | stat: -rw-r--r-- 1,185 bytes parent folder | download | duplicates (13)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
; RUN: opt < %s -passes=pgo-instr-gen -pgo-instr-select=true -S | FileCheck %s --check-prefix=GEN
; RUN: opt < %s -passes=pgo-instr-gen -pgo-instr-select=false -S | FileCheck %s --check-prefix=NOSELECT
; RUN: llvm-profdata merge %S/Inputs/select1.proftext -o %t.profdata
; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -pgo-instr-select=true -S | FileCheck %s --check-prefix=USE
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define i32 @test_br_2(i32 %i) {
entry:
  %cmp = icmp sgt i32 %i, 0
  br i1 %cmp, label %if.then, label %if.else

if.then:
  %add = add nsw i32 %i, 2
;GEN: %[[STEP:[0-9]+]] = zext i1 %cmp to i64
;GEN: call void @llvm.instrprof.increment.step({{.*}} i32 3, i32 2, i64 %[[STEP]])
;NOSELECT-NOT: call void @llvm.instrprof.increment.step
  %s = select i1 %cmp, i32 %add, i32 0
;USE: select i1 %cmp{{.*}}, !prof ![[BW_ENTRY:[0-9]+]]
;USE: ![[BW_ENTRY]] = !{!"branch_weights", i32 1, i32 3}

  br label %if.end

if.else:
  %sub = sub nsw i32 %i, 2
  br label %if.end

if.end:
  %retv = phi i32 [ %add, %if.then ], [ %sub, %if.else ]
  ret i32 %retv
}