File: byval_lifetime.ll

package info (click to toggle)
llvm-toolchain-3.9 1%3A3.9.1-8
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 441,060 kB
  • ctags: 428,777
  • sloc: cpp: 2,546,577; ansic: 538,318; asm: 119,677; objc: 103,316; python: 102,148; sh: 27,847; pascal: 5,626; ml: 5,510; perl: 5,293; lisp: 4,801; makefile: 2,177; xml: 686; cs: 362; php: 212; csh: 117
file content (26 lines) | stat: -rw-r--r-- 766 bytes parent folder | download | duplicates (6)
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 -inline < %s | FileCheck %s
; END.

; By inlining foo, an alloca is created in main to hold the byval argument, so
; a lifetime marker should be generated as well by default.

%struct.foo = type { i32, [16 x i32] }

@gFoo = global %struct.foo zeroinitializer, align 8

define i32 @foo(%struct.foo* byval align 8 %f, i32 %a) {
entry:
  %a1 = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 0, i32 1
  %arrayidx = getelementptr inbounds [16 x i32], [16 x i32]* %a1, i32 0, i32 %a
  %tmp2 = load i32, i32* %arrayidx, align 1
  ret i32 %tmp2
}

define i32 @main(i32 %argc, i8** %argv) {
; CHECK-LABEL: @main
; CHECK: llvm.lifetime.start
; CHECK: memcpy
entry:
  %call = call i32 @foo(%struct.foo* byval align 8 @gFoo, i32 %argc)
  ret i32 %call
}