3787ee4571
Relands commit 433c8d950c with fixes for
MIPS.
Similar to D102742, specifying the stack alignment via CodegenOpts means
that this flag gets dropped during LTO, unless the command line is
re-specified as a plugin opt. Instead, encode this information as a
module level attribute so that we don't have to expose this llvm
internal flag when linking the Linux kernel with LTO.
Looks like external dependencies might need a fix:
* https://github.com/llvm-hs/llvm-hs/issues/345
* https://github.com/halide/Halide/issues/6079
Link: https://github.com/ClangBuiltLinux/linux/issues/1377
Reviewed By: tejohnson
Differential Revision: https://reviews.llvm.org/D103048
31 lines
692 B
LLVM
31 lines
692 B
LLVM
; 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}
|