File: no-tail-call.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (64 lines) | stat: -rw-r--r-- 2,159 bytes parent folder | download | duplicates (12)
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
; RUN: llc < %s -O0 -o - | FileCheck %s
target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
target triple = "armv7s-apple-ios7"

%foo = type <{ %Sf }>
%Sf = type <{ float }>

declare float @llvm.ceil.f32(float) 

; Check that we are not emitting a tail call for the last call to ceil.
; This function returns three different results.
; CHECK-LABEL: func1:
; CHECK-NOT: b _ceilf
; CHECK: pop
define { float, float, float } @func1() {
entry:
  %0 = alloca %foo, align 4
  %1 = alloca %foo, align 4
  %2 = alloca %foo, align 4
  store float 0.000000e+00, ptr %0, align 4
  store float 1.000000e+00, ptr %1, align 4
  store float 5.000000e+00, ptr %2, align 4
  br i1 true, label %3, label %4

; <label>:3                                       ; preds = %entry
  store float 2.000000e+00, ptr %1, align 4
  br label %4

; <label>:4                                       ; preds = %3, %entry
  %5 = call float @llvm.ceil.f32(float 5.000000e+00)
  %6 = load float, ptr %1, align 4
  %7 = call float @llvm.ceil.f32(float %6)
  %8 = insertvalue { float, float, float } { float 0.000000e+00, float undef, float undef }, float %5, 1
  %9 = insertvalue { float, float, float } %8, float %7, 2
  ret { float, float, float } %9
}

; Check that we are not emitting a tail call for the last call to ceil.
; This function returns two different results.
; CHECK-LABEL: func2:
; CHECK-NOT: b _ceilf
; CHECK: pop
define { float, float } @func2() {
entry:
  %0 = alloca %foo, align 4
  %1 = alloca %foo, align 4
  %2 = alloca %foo, align 4
  store float 0.000000e+00, ptr %0, align 4
  store float 1.000000e+00, ptr %1, align 4
  store float 5.000000e+00, ptr %2, align 4
  br i1 true, label %3, label %4

; <label>:3                                       ; preds = %entry
  store float 2.000000e+00, ptr %1, align 4
  br label %4

; <label>:4                                       ; preds = %3, %entry
  %5 = call float @llvm.ceil.f32(float 5.000000e+00)
  %6 = load float, ptr %1, align 4
  %7 = call float @llvm.ceil.f32(float %6)
  %8 = insertvalue { float, float } { float 0.000000e+00, float undef }, float %7, 1
  ret { float, float } %8
}