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llvm-mirror/test/CodeGen/SystemZ/alloca-03.ll

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[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Allocate 8 bytes, no need to align stack.
define void @f0() {
; CHECK-LABEL: f0:
; CHECK: aghi %r15, -168
; CHECK-NOT: nil
; CHECK: mvghi 160(%r15), 10
; CHECK: aghi %r15, 168
%x = alloca i64
store volatile i64 10, i64* %x
ret void
}
; Allocate %len * 8, no need to align stack.
define void @f1(i64 %len) {
; CHECK-LABEL: f1:
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK-DAG: sllg %r0, %r2, 3
; CHECK-DAG: lgr %r1, %r15
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
; CHECK: sgr %r1, %r0
; CHECK-NOT: ngr
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK-DAG: lgr %r15, %r1
; CHECK-DAG: la %r2, 160(%r1)
; CHECK: mvghi 0(%r2), 10
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
%x = alloca i64, i64 %len
store volatile i64 10, i64* %x
ret void
}
; Static alloca, align 128.
define void @f2() {
; CHECK-LABEL: f2:
; CHECK: aghi %r1, -128
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK-DAG: lgr %r15, %r1
; CHECK-DAG: la %r2, 280(%r1)
; CHECK-DAG: nill %r2, 65408
; CHECK: mvghi 0(%r2), 10
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
%x = alloca i64, i64 1, align 128
store volatile i64 10, i64* %x, align 128
ret void
}
; Dynamic alloca, align 128.
define void @f3(i64 %len) {
; CHECK-LABEL: f3:
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK-DAG: sllg %r2, %r2, 3
; CHECK-DAG: la %r0, 120(%r2)
; CHECK-DAG: lgr %r1, %r15
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
; CHECK: sgr %r1, %r0
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK: la %r2, 280(%r1)
; CHECK: nill %r2, 65408
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
; CHECK: lgr %r15, %r1
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK: mvghi 0(%r2), 10
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
%x = alloca i64, i64 %len, align 128
store volatile i64 10, i64* %x, align 128
ret void
}
; Static alloca w/out alignment - part of frame.
define void @f4() {
; CHECK-LABEL: f4:
; CHECK: aghi %r15, -168
; CHECK: mvhi 164(%r15), 10
; CHECK: aghi %r15, 168
%x = alloca i32
store volatile i32 10, i32* %x
ret void
}
; Static alloca of one i32, aligned by 128.
define void @f5() {
; CHECK-LABEL: f5:
; CHECK: lgr %r1, %r15
; CHECK: aghi %r1, -128
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK: la %r2, 280(%r1)
; CHECK: nill %r2, 65408
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
; CHECK: lgr %r15, %r1
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 15:59:28 +02:00
; CHECK: mvhi 0(%r2), 10
[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. llvm-svn: 254227
2015-11-28 12:02:32 +01:00
%x = alloca i32, i64 1, align 128
store volatile i32 10, i32* %x
ret void
}
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