File: lambda-deterministic-captures.cpp

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-- 1,090 bytes parent folder | download | duplicates (3) 
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: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm --std=c++17 %s -o - | FileCheck %s

struct stream {
  friend const stream &operator<<(const stream &, const float &);
};

void foo() {
  constexpr float f_zero = 0.0f;
  constexpr float f_one = 1.0f;
  constexpr float f_two = 2.0f;

  stream s;
  [=]() {
    s << f_zero << f_one << f_two;
  }();
}

// CHECK: define{{.*}} void @_Z3foov
// CHECK:      getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 1
// CHECK-NEXT: store float 0.000
// CHECK-NEXT: getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK-NEXT: store float 1.000
// CHECK-NEXT: getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 3
// CHECK-NEXT: store float 2.000

// The lambda body.  Reverse iteration when the captures aren't deterministic
// causes these to be laid out differently in the lambda.
// CHECK: define internal void
// CHECK: getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 1
// CHECK: getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK: getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 3