llvm/test/CodeGen/SystemZ/alloca-04.ll

; Check the "no-realign-stack" function attribute. We should get a warning.

; RUN: llc < %s -mtriple=s390x-linux-gnu -debug-only=codegen 2>&1 | \
; RUN:   FileCheck %s
; REQUIRES: asserts

define void @f6() "no-realign-stack" {
  %x = alloca i64, i64 1, align 128
  store volatile i64 10, i64* %x, align 128
  ret void
}

; CHECK: Warning: requested alignment 128 exceeds the stack alignment 8
; CHECK-NOT: nill
[Stack realignment] Handling of aligned allocas. This patch implements dynamic realignment of stack objects for targets with a non-realigned stack pointer. Behaviour in FunctionLoweringInfo is changed so that for a target that has StackRealignable set to false, over-aligned static allocas are considered to be variable-sized objects and are handled with DYNAMIC_STACKALLOC nodes. It would be good to group aligned allocas into a single big alloca as an optimization, but this is yet todo. SystemZ benefits from this, due to its stack frame layout. New tests SystemZ/alloca-03.ll for aligned allocas, and SystemZ/alloca-04.ll for "no-realign-stack" attribute on functions. Review and help from Ulrich Weigand and Hal Finkel. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254227 91177308-0d34-0410-b5e6-96231b3b80d8 2015-11-28 11:02:32 +00:00			`; Check the "no-realign-stack" function attribute. We should get a warning.`

			`; RUN: llc < %s -mtriple=s390x-linux-gnu -debug-only=codegen 2>&1 \| \`
			`; RUN: FileCheck %s`
llvm/test/CodeGen/SystemZ/alloca-04.ll REQUIRES asserts due to -debug-pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254230 91177308-0d34-0410-b5e6-96231b3b80d8 2015-11-28 13:05:49 +00:00			`; REQUIRES: asserts`
[Stack realignment] Handling of aligned allocas. This patch implements dynamic realignment of stack objects for targets with a non-realigned stack pointer. Behaviour in FunctionLoweringInfo is changed so that for a target that has StackRealignable set to false, over-aligned static allocas are considered to be variable-sized objects and are handled with DYNAMIC_STACKALLOC nodes. It would be good to group aligned allocas into a single big alloca as an optimization, but this is yet todo. SystemZ benefits from this, due to its stack frame layout. New tests SystemZ/alloca-03.ll for aligned allocas, and SystemZ/alloca-04.ll for "no-realign-stack" attribute on functions. Review and help from Ulrich Weigand and Hal Finkel. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254227 91177308-0d34-0410-b5e6-96231b3b80d8 2015-11-28 11:02:32 +00:00
			`define void @f6() "no-realign-stack" {`
			`%x = alloca i64, i64 1, align 128`
			`store volatile i64 10, i64* %x, align 128`
			`ret void`
			`}`

			`; CHECK: Warning: requested alignment 128 exceeds the stack alignment 8`
			`; CHECK-NOT: nill`