File: preserve-used-ret.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (32 lines) | stat: -rw-r--r-- 869 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
27
28
29
30
31
32
 
; RUN: opt -S -passes=deadargelim %s | FileCheck %s

define internal { i64, i64 } @f(i64 %a, i64 %b) {
start:
  %0 = insertvalue { i64, i64 } undef, i64 %a, 0
  %1 = insertvalue { i64, i64 } %0, i64 %b, 1
  ret { i64, i64 } %1
}

; Check that we don't delete either of g's return values

; CHECK-LABEL: define internal { i64, i64 } @g(i64 %a, i64 %b)
define internal { i64, i64 } @g(i64 %a, i64 %b) {
start:
  %0 = call { i64, i64 } @f(i64 %a, i64 %b)
  ret { i64, i64 } %0
}

declare dso_local i32 @test(i64, i64)

define i32 @main(i32 %argc, i8** %argv) {
start:
  %x = call { i64, i64 } @g(i64 13, i64 42)
  %x.0 = extractvalue { i64, i64 } %x, 0
  %x.1 = extractvalue { i64, i64 } %x, 1
  %z = bitcast i64 %x.0 to i64
  %y = call { i64, i64 } @f(i64 %x.0, i64 %x.1)
  %y.1 = extractvalue { i64, i64 } %y, 1
  %0 = call i32 @test(i64 %x.0, i64 %y.1)
  ret i32 %0
}