89b7b3b995
Add support for dynamically sized alloca instructions with the PTX alloca instruction introduced in PTX 7.3 ([9.7.15.3. Stack Manipulation Instructions: alloca] (https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#stack-manipulation-instructions-alloca))
37 lines
850 B
LLVM
37 lines
850 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
|
|
|
|
; Stack realignment not supported.
|
|
; XFAIL: target=sparc{{.*}}
|
|
|
|
; NVPTX can only select dynamic_stackalloc on sm_52+ and with ptx73+
|
|
; XFAIL: target=nvptx{{.*}}
|
|
|
|
define i32 @f(ptr %p) nounwind {
|
|
entry:
|
|
%0 = load i8, ptr %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.p0.i32(ptr %0, i8 0, i32 %i, i1 false)
|
|
%call = call i32 @f(ptr %0)
|
|
%conv = sext i32 %call to i64
|
|
ret i64 %conv
|
|
}
|
|
|
|
declare void @llvm.memset.p0.i32(ptr, i8, i32, i1) nounwind
|
|
|
|
!llvm.module.flags = !{!0}
|
|
!0 = !{i32 2, !"override-stack-alignment", i32 32}
|