File: opt-spill-volatile.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (29 lines) | stat: -rw-r--r-- 905 bytes parent folder | download | duplicates (15) 
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
 
; RUN: llc -march=hexagon < %s | FileCheck %s
; Check that the load/store to the volatile stack object has not been
; optimized away.

target triple = "hexagon"

; CHECK-LABEL: foo
; CHECK: memw(r29+#4) =
; CHECK: = memw(r29+#4)
define i32 @foo(i32 %a) #0 {
entry:
  %x = alloca i32, align 4
  %x.0.x.0..sroa_cast = bitcast i32* %x to i8*
  call void @llvm.lifetime.start.p0i8(i64 4, i8* %x.0.x.0..sroa_cast)
  store volatile i32 0, i32* %x, align 4
  %call = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)() #0
  %x.0.x.0. = load volatile i32, i32* %x, align 4
  %add = add nsw i32 %x.0.x.0., %a
  call void @llvm.lifetime.end.p0i8(i64 4, i8* %x.0.x.0..sroa_cast)
  ret i32 %add
}

declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1

declare i32 @bar(...) #0

attributes #0 = { nounwind }
attributes #1 = { argmemonly nounwind }