File: ForceStackAlign.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 (30 lines) | stat: -rw-r--r-- 692 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
27
28
29
30
 
; Check that stack alignment can be forced. Individual targets should test their
; specific implementation details.

; RUN: llc < %s -stackrealign | FileCheck %s
; CHECK-LABEL: @f
; CHECK-LABEL: @g

define i32 @f(i8* %p) nounwind {
entry:
  %0 = load i8, i8* %p
  %conv = sext i8 %0 to i32
  ret i32 %conv
}

define i64 @g(i32 %i) nounwind {
entry:
  br label %if.then

if.then:
  %0 = alloca i8, i32 %i
  call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 %i, i1 false)
  %call = call i32 @f(i8* %0)
  %conv = sext i32 %call to i64
  ret i64 %conv
}

declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind

!llvm.module.flags = !{!0}
!0 = !{i32 2, !"override-stack-alignment", i32 32}