File: 2011-11-11-EmptyStruct.ll

package info (click to toggle)
llvm-toolchain-3.8 1%3A3.8.1-24
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 379,280 kB
  • ctags: 388,501
  • sloc: cpp: 2,309,705; ansic: 477,070; objc: 100,918; asm: 97,974; python: 95,911; sh: 18,634; makefile: 7,294; perl: 5,584; ml: 5,460; pascal: 4,661; lisp: 2,548; xml: 686; cs: 350; php: 212; csh: 117
file content (26 lines) | stat: -rw-r--r-- 950 bytes parent folder | download | duplicates (4)
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
; RUN: opt < %s -S -scalarrepl | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

%struct.S = type { [2 x %struct.anon], double }
%struct.anon = type {}

; CHECK: @test()
; CHECK-NOT: alloca
; CHECK: ret double 1.0

define double @test() nounwind uwtable ssp {
entry:
  %retval = alloca %struct.S, align 8
  %ret = alloca %struct.S, align 8
  %b = getelementptr inbounds %struct.S, %struct.S* %ret, i32 0, i32 1
  store double 1.000000e+00, double* %b, align 8
  %0 = bitcast %struct.S* %retval to i8*
  %1 = bitcast %struct.S* %ret to i8*
  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 8, i32 8, i1 false)
  %2 = bitcast %struct.S* %retval to double*
  %3 = load double, double* %2, align 1
  ret double %3
}

declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind