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llvm-6502/test/CodeGen/AArch64/arm64-variadic-aapcs.ll

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ARM64: initial backend import This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00
; RUN: llc -verify-machineinstrs -mtriple=arm64-linux-gnu -pre-RA-sched=linearize -enable-misched=false < %s | FileCheck %s
%va_list = type {i8*, i8*, i8*, i32, i32}
@var = global %va_list zeroinitializer, align 8
declare void @llvm.va_start(i8*)
define void @test_simple(i32 %n, ...) {
; CHECK-LABEL: test_simple:
; CHECK: sub sp, sp, #[[STACKSIZE:[0-9]+]]
; CHECK: add [[STACK_TOP:x[0-9]+]], sp, #[[STACKSIZE]]
; CHECK: adrp x[[VA_LIST_HI:[0-9]+]], var
; CHECK: stp x1, x2, [sp, #[[GR_BASE:[0-9]+]]]
; ... omit middle ones ...
; CHECK: str x7, [sp, #
; CHECK: stp q0, q1, [sp]
; ... omit middle ones ...
; CHECK: stp q6, q7, [sp, #
; CHECK: str [[STACK_TOP]], [x[[VA_LIST_HI]], :lo12:var]
; CHECK: add [[GR_TOPTMP:x[0-9]+]], sp, #[[GR_BASE]]
; CHECK: add [[GR_TOP:x[0-9]+]], [[GR_TOPTMP]], #56
; CHECK: add x[[VA_LIST:[0-9]+]], {{x[0-9]+}}, :lo12:var
; CHECK: str [[GR_TOP]], [x[[VA_LIST]], #8]
; CHECK: mov [[VR_TOPTMP:x[0-9]+]], sp
; CHECK: add [[VR_TOP:x[0-9]+]], [[VR_TOPTMP]], #128
; CHECK: str [[VR_TOP]], [x[[VA_LIST]], #16]
ARM64: use hex immediates for movz/movk instructions Since these are mostly used in "lsl #16", "lsl #32", "lsl #48" combinations to piece together an immediate in 16-bit chunks, hex is probably the most appropriate format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207635 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-30 11:19:40 +00:00
; CHECK: movn [[GR_OFFS:w[0-9]+]], #0x37
ARM64: initial backend import This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00
; CHECK: str [[GR_OFFS]], [x[[VA_LIST]], #24]
; CHECK: orr [[VR_OFFS:w[0-9]+]], wzr, #0xffffff80
; CHECK: str [[VR_OFFS]], [x[[VA_LIST]], #28]
%addr = bitcast %va_list* @var to i8*
call void @llvm.va_start(i8* %addr)
ret void
}
define void @test_fewargs(i32 %n, i32 %n1, i32 %n2, float %m, ...) {
; CHECK-LABEL: test_fewargs:
; CHECK: sub sp, sp, #[[STACKSIZE:[0-9]+]]
; CHECK: add [[STACK_TOP:x[0-9]+]], sp, #[[STACKSIZE]]
; CHECK: adrp x[[VA_LIST_HI:[0-9]+]], var
; CHECK: stp x3, x4, [sp, #[[GR_BASE:[0-9]+]]]
; ... omit middle ones ...
; CHECK: str x7, [sp, #
; CHECK: stp q1, q2, [sp]
; ... omit middle ones ...
; CHECK: str q7, [sp, #
; CHECK: str [[STACK_TOP]], [x[[VA_LIST_HI]], :lo12:var]
; CHECK: add [[GR_TOPTMP:x[0-9]+]], sp, #[[GR_BASE]]
; CHECK: add [[GR_TOP:x[0-9]+]], [[GR_TOPTMP]], #40
; CHECK: add x[[VA_LIST:[0-9]+]], {{x[0-9]+}}, :lo12:var
; CHECK: str [[GR_TOP]], [x[[VA_LIST]], #8]
; CHECK: mov [[VR_TOPTMP:x[0-9]+]], sp
; CHECK: add [[VR_TOP:x[0-9]+]], [[VR_TOPTMP]], #112
; CHECK: str [[VR_TOP]], [x[[VA_LIST]], #16]
ARM64: use hex immediates for movz/movk instructions Since these are mostly used in "lsl #16", "lsl #32", "lsl #48" combinations to piece together an immediate in 16-bit chunks, hex is probably the most appropriate format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207635 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-30 11:19:40 +00:00
; CHECK: movn [[GR_OFFS:w[0-9]+]], #0x27
ARM64: initial backend import This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00
; CHECK: str [[GR_OFFS]], [x[[VA_LIST]], #24]
ARM64: use hex immediates for movz/movk instructions Since these are mostly used in "lsl #16", "lsl #32", "lsl #48" combinations to piece together an immediate in 16-bit chunks, hex is probably the most appropriate format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207635 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-30 11:19:40 +00:00
; CHECK: movn [[VR_OFFS:w[0-9]+]], #0x6f
ARM64: initial backend import This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00
; CHECK: str [[VR_OFFS]], [x[[VA_LIST]], #28]
%addr = bitcast %va_list* @var to i8*
call void @llvm.va_start(i8* %addr)
ret void
}
define void @test_nospare([8 x i64], [8 x float], ...) {
; CHECK-LABEL: test_nospare:
%addr = bitcast %va_list* @var to i8*
call void @llvm.va_start(i8* %addr)
; CHECK-NOT: sub sp, sp
; CHECK: mov [[STACK:x[0-9]+]], sp
; CHECK: str [[STACK]], [{{x[0-9]+}}, :lo12:var]
ret void
}
; If there are non-variadic arguments on the stack (here two i64s) then the
; __stack field should point just past them.
AArch64: treat [N x Ty] as a block during procedure calls. The AAPCS treats small structs and homogeneous floating (or vector) aggregates specially, and guarantees they either get passed as a contiguous block of registers, or prevent any future use of those registers and get passed on the stack. This concept can fit quite neatly into LLVM's own type system, mapping an HFA to [N x float] and so on, and small structs to [N x i64]. Doing so allows front-ends to emit AAPCS compliant code without having to duplicate the register counting logic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222903 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-27 21:02:42 +00:00
define void @test_offsetstack([8 x i64], [2 x i64], [3 x float], ...) {
ARM64: initial backend import This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00
; CHECK-LABEL: test_offsetstack:
; CHECK: sub sp, sp, #80
; CHECK: add [[STACK_TOP:x[0-9]+]], sp, #96
; CHECK: str [[STACK_TOP]], [{{x[0-9]+}}, :lo12:var]
%addr = bitcast %va_list* @var to i8*
call void @llvm.va_start(i8* %addr)
ret void
}
declare void @llvm.va_end(i8*)
define void @test_va_end() nounwind {
; CHECK-LABEL: test_va_end:
; CHECK-NEXT: BB#0
%addr = bitcast %va_list* @var to i8*
call void @llvm.va_end(i8* %addr)
ret void
; CHECK-NEXT: ret
}
declare void @llvm.va_copy(i8* %dest, i8* %src)
@second_list = global %va_list zeroinitializer
define void @test_va_copy() {
; CHECK-LABEL: test_va_copy:
%srcaddr = bitcast %va_list* @var to i8*
%dstaddr = bitcast %va_list* @second_list to i8*
call void @llvm.va_copy(i8* %dstaddr, i8* %srcaddr)
; CHECK: add x[[SRC:[0-9]+]], {{x[0-9]+}}, :lo12:var
; CHECK: ldr [[BLOCK:q[0-9]+]], [x[[SRC]]]
; CHECK: add x[[DST:[0-9]+]], {{x[0-9]+}}, :lo12:second_list
; CHECK: str [[BLOCK]], [x[[DST]]]
; CHECK: ldr [[BLOCK:q[0-9]+]], [x[[SRC]], #16]
; CHECK: str [[BLOCK]], [x[[DST]], #16]
ret void
; CHECK: ret
}
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