mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
a71c14303e
realignment should be forced. With this commit, we can now force stack realignment when doing LTO and do so on a per-function basis. Also, add a new cl::opt option "stackrealign" to CommandFlags.h which is used to force stack realignment via llc's command line. Out-of-tree projects currently using -force-align-stack to force stack realignment should make changes to attach the attribute to the functions in the IR. Differential Revision: http://reviews.llvm.org/D11814 llvm-svn: 247450
44 lines
1.2 KiB
LLVM
44 lines
1.2 KiB
LLVM
; RUN: llc < %s -stackrealign -mtriple i386-apple-darwin -mcpu=i486 | FileCheck %s
|
|
|
|
%struct.foo = type { [88 x i8] }
|
|
|
|
declare void @bar(i8* nocapture, %struct.foo* align 4 byval) nounwind
|
|
declare void @baz(i8*) nounwind
|
|
|
|
; PR15249
|
|
; We can't use rep;movsl here because it clobbers the base pointer in %esi.
|
|
define void @test1(%struct.foo* nocapture %x, i32 %y) nounwind {
|
|
%dynalloc = alloca i8, i32 %y, align 1
|
|
call void @bar(i8* %dynalloc, %struct.foo* align 4 byval %x)
|
|
ret void
|
|
|
|
; CHECK-LABEL: test1:
|
|
; CHECK: andl $-16, %esp
|
|
; CHECK: movl %esp, %esi
|
|
; CHECK-NOT: rep;movsl
|
|
}
|
|
|
|
; PR19012
|
|
; Also don't clobber %esi if the dynamic alloca comes after the memcpy.
|
|
define void @test2(%struct.foo* nocapture %x, i32 %y, i8* %z) nounwind {
|
|
call void @bar(i8* %z, %struct.foo* align 4 byval %x)
|
|
%dynalloc = alloca i8, i32 %y, align 1
|
|
call void @baz(i8* %dynalloc)
|
|
ret void
|
|
|
|
; CHECK-LABEL: test2:
|
|
; CHECK: movl %esp, %esi
|
|
; CHECK-NOT: rep;movsl
|
|
}
|
|
|
|
; Check that we do use rep movs if we make the alloca static.
|
|
define void @test3(%struct.foo* nocapture %x, i32 %y, i8* %z) nounwind {
|
|
call void @bar(i8* %z, %struct.foo* align 4 byval %x)
|
|
%statalloc = alloca i8, i32 8, align 1
|
|
call void @baz(i8* %statalloc)
|
|
ret void
|
|
|
|
; CHECK-LABEL: test3:
|
|
; CHECK: rep;movsl
|
|
}
|