forked from OSchip/llvm-project
172 lines
4.7 KiB
LLVM
172 lines
4.7 KiB
LLVM
; RUN: llc -mtriple=aarch64-linux-gnu -disable-post-ra -verify-machineinstrs -o - %s | FileCheck %s
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; RUN: llc -mtriple=arm64-apple-ios -disable-post-ra -verify-machineinstrs -o - %s | FileCheck %s --check-prefix=CHECK-MACHO
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; RUN: llc -mtriple=aarch64-none-linux-gnu -disable-post-ra -mattr=-fp-armv8 -verify-machineinstrs < %s | FileCheck --check-prefix=CHECK-NOFP-ARM64 %s
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declare void @use_addr(i8*)
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define void @test_simple_alloca(i64 %n) {
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; CHECK-LABEL: test_simple_alloca:
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%buf = alloca i8, i64 %n
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; Make sure we align the stack change to 16 bytes:
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; CHECK: {{mov|add}} x29
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; CHECK: mov [[TMP:x[0-9]+]], sp
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; CHECK: add [[SPDELTA_TMP:x[0-9]+]], x0, #15
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; CHECK: and [[SPDELTA:x[0-9]+]], [[SPDELTA_TMP]], #0xfffffffffffffff0
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; Make sure we change SP. It would be surprising if anything but x0 were used
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; for the final sp, but it could be if it was then moved into x0.
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; CHECK: sub [[NEWSP:x[0-9]+]], [[TMP]], [[SPDELTA]]
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; CHECK: mov sp, [[NEWSP]]
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call void @use_addr(i8* %buf)
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; CHECK: bl use_addr
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ret void
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; Make sure epilogue restores sp from fp
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; CHECK: {{sub|mov}} sp, x29
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; CHECK: ret
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}
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declare void @use_addr_loc(i8*, i64*)
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define i64 @test_alloca_with_local(i64 %n) {
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; CHECK-LABEL: test_alloca_with_local:
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; CHECK-DAG: sub sp, sp, [[LOCAL_STACK:#[0-9]+]]
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; CHECK-DAG: {{mov|add}} x29, sp
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%loc = alloca i64
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%buf = alloca i8, i64 %n
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; Make sure we align the stack change to 16 bytes:
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; CHECK: mov [[TMP:x[0-9]+]], sp
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; CHECK: add [[SPDELTA_TMP:x[0-9]+]], x0, #15
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; CHECK: and [[SPDELTA:x[0-9]+]], [[SPDELTA_TMP]], #0xfffffffffffffff0
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; Make sure we change SP. It would be surprising if anything but x0 were used
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; for the final sp, but it could be if it was then moved into x0.
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; CHECK: sub [[NEWSP:x[0-9]+]], [[TMP]], [[SPDELTA]]
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; CHECK: mov sp, [[NEWSP]]
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; CHECK: sub {{x[0-9]+}}, x29, #[[LOC_FROM_FP:[0-9]+]]
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call void @use_addr_loc(i8* %buf, i64* %loc)
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; CHECK: bl use_addr
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%val = load i64, i64* %loc
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; CHECK: ldur x0, [x29, #-[[LOC_FROM_FP]]]
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ret i64 %val
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; Make sure epilogue restores sp from fp
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; CHECK: {{sub|mov}} sp, x29
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; CHECK: ret
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}
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define void @test_variadic_alloca(i64 %n, ...) {
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; CHECK-LABEL: test_variadic_alloca:
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; [...]
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; CHECK-NOFP-AARCH64: sub sp, sp, #80
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; CHECK-NOFP-AARCH64: stp x29, x30, [sp, #64]
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; CHECK-NOFP-AARCH64: add x29, sp, #64
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; CHECK-NOFP-AARCH64: sub [[TMP:x[0-9]+]], x29, #64
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; CHECK-NOFP-AARCH64: add x8, [[TMP]], #0
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; CHECK: stp x29, x30, [sp, #-16]!
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; CHECK: mov x29, sp
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; CHECK: sub sp, sp, #192
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; CHECK-DAG: stp q6, q7, [x29, #-96]
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; [...]
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; CHECK-DAG: stp q0, q1, [x29, #-192]
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; CHECK-DAG: stp x5, x6, [x29, #-24]
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; [...]
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; CHECK-DAG: stp x1, x2, [x29, #-56]
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; CHECK-NOFP-ARM64: stp x29, x30, [sp, #-16]!
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; CHECK-NOFP-ARM64: mov x29, sp
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; CHECK-NOFP-ARM64: sub sp, sp, #64
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; CHECK-NOFP-ARM64-DAG: stp x5, x6, [x29, #-24]
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; [...]
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; CHECK-NOFP-ARM64-DAG: stp x3, x4, [x29, #-40]
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; [...]
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; CHECK-NOFP-ARM64-DAG: stp x1, x2, [x29, #-56]
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; [...]
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; CHECK-NOFP-ARM64: mov x8, sp
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%addr = alloca i8, i64 %n
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call void @use_addr(i8* %addr)
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; CHECK: bl use_addr
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ret void
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; CHECK-NOFP-AARCH64: sub sp, x29, #64
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; CHECK-NOFP-AARCH64: ldp x29, x30, [sp, #64]
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; CHECK-NOFP-AARCH64: add sp, sp, #80
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; CHECK-NOFP-ARM64: mov sp, x29
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; CHECK-NOFP-ARM64: ldp x29, x30, [sp], #16
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}
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define void @test_alloca_large_frame(i64 %n) {
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; CHECK-LABEL: test_alloca_large_frame:
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; CHECK-MACHO-LABEL: test_alloca_large_frame:
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; CHECK: stp x29, x30, [sp, #-32]!
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; CHECK: stp x28, x19, [sp, #16]
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; CHECK: mov x29, sp
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; CHECK: sub sp, sp, #1953, lsl #12
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; CHECK: sub sp, sp, #512
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; CHECK-MACHO: stp x20, x19, [sp, #-32]!
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; CHECK-MACHO: stp x29, x30, [sp, #16]
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; CHECK-MACHO: add x29, sp, #16
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; CHECK-MACHO: sub sp, sp, #1953, lsl #12
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; CHECK-MACHO: sub sp, sp, #512
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%addr1 = alloca i8, i64 %n
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%addr2 = alloca i64, i64 1000000
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call void @use_addr_loc(i8* %addr1, i64* %addr2)
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ret void
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; CHECK: mov sp, x29
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; CHECK: ldp x28, x19, [sp, #16]
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; CHECK: ldp x29, x30, [sp], #32
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; CHECK-MACHO: sub sp, x29, #16
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; CHECK-MACHO: ldp x29, x30, [sp, #16]
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; CHECK-MACHO: ldp x20, x19, [sp], #32
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}
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declare i8* @llvm.stacksave()
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declare void @llvm.stackrestore(i8*)
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define void @test_scoped_alloca(i64 %n) {
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; CHECK-LABEL: test_scoped_alloca:
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%sp = call i8* @llvm.stacksave()
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; CHECK: mov x29, sp
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; CHECK: mov [[SAVED_SP:x[0-9]+]], sp
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; CHECK: mov [[OLDSP:x[0-9]+]], sp
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%addr = alloca i8, i64 %n
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; CHECK: and [[SPDELTA:x[0-9]+]], {{x[0-9]+}}, #0xfffffffffffffff0
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; CHECK-DAG: sub [[NEWSP:x[0-9]+]], [[OLDSP]], [[SPDELTA]]
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; CHECK: mov sp, [[NEWSP]]
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call void @use_addr(i8* %addr)
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; CHECK: bl use_addr
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call void @llvm.stackrestore(i8* %sp)
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; CHECK: mov sp, [[SAVED_SP]]
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ret void
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}
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