shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/CodeGen/AArch64/arm64-memset-inline.ll
Momchil Velikov 50a97aacac [AArch64] Async unwind - function prologues 
Re-commit of 32e8b550e5439c7e4aafa73894faffd5f25d0d05

This patch rearranges emission of CFI instructions, so the resulting
DWARF and `.eh_frame` information is precise at every instruction.

The current state is that the unwind info is emitted only after the
function prologue. This is fine for synchronous (e.g. C++) exceptions,
but the information is generally incorrect when the program counter is
at an instruction in the prologue or the epilogue, for example:

```
stp	x29, x30, [sp, #-16]!           // 16-byte Folded Spill
mov	x29, sp
.cfi_def_cfa w29, 16
...
```

after the `stp` is executed the (initial) rule for the CFA still says
the CFA is in the `sp`, even though it's already offset by 16 bytes

A correct unwind info could look like:
```
stp	x29, x30, [sp, #-16]!           // 16-byte Folded Spill
.cfi_def_cfa_offset 16
mov	x29, sp
.cfi_def_cfa w29, 16
...
```

Having this information precise up to an instruction is useful for
sampling profilers that would like to get a stack backtrace. The end
goal (towards this patch is just a step) is to have fully working
`-fasynchronous-unwind-tables`.

Reviewed By: danielkiss, MaskRay

Differential Revision: https://reviews.llvm.org/D111411
2022-03-24 16:16:44 +00:00

593 lines
19 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm64-eabi | FileCheck %s
define void @bzero_4_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_4_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: str wzr, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 4 %c, i8 0, i64 4, i1 false)
ret void
}
define void @bzero_8_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_8_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: str xzr, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 8 %c, i8 0, i64 8, i1 false)
ret void
}
define void @bzero_12_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_12_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: str wzr, [x0, #8]
; CHECK-NEXT: str xzr, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 8 %c, i8 0, i64 12, i1 false)
ret void
}
define void @bzero_16_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_16_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: stp xzr, xzr, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 8 %c, i8 0, i64 16, i1 false)
ret void
}
define void @bzero_32_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_32_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: stp q0, q0, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 8 %c, i8 0, i64 32, i1 false)
ret void
}
define void @bzero_64_heap(i8* nocapture %c) {
; CHECK-LABEL: bzero_64_heap:
; CHECK: // %bb.0:
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: stp q0, q0, [x0, #32]
; CHECK-NEXT: stp q0, q0, [x0]
; CHECK-NEXT: ret
call void @llvm.memset.p0i8.i64(i8* align 8 %c, i8 0, i64 64, i1 false)
ret void
}
define void @bzero_4_stack() {
; CHECK-LABEL: bzero_4_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: add x0, sp, #12
; CHECK-NEXT: str wzr, [sp, #12]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%buf = alloca [4 x i8], align 1
%cast = bitcast [4 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 4, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_8_stack() {
; CHECK-LABEL: bzero_8_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: stp x30, xzr, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: add x0, sp, #8
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%buf = alloca [8 x i8], align 1
%cast = bitcast [8 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 8, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_12_stack() {
; CHECK-LABEL: bzero_12_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #32
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str wzr, [sp, #8]
; CHECK-NEXT: str xzr, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #32
; CHECK-NEXT: ret
%buf = alloca [12 x i8], align 1
%cast = bitcast [12 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 12, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_16_stack() {
; CHECK-LABEL: bzero_16_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #32
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: stp xzr, x30, [sp, #8] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str xzr, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #32
; CHECK-NEXT: ret
%buf = alloca [16 x i8], align 1
%cast = bitcast [16 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 16, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_20_stack() {
; CHECK-LABEL: bzero_20_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: add x0, sp, #8
; CHECK-NEXT: stp xzr, xzr, [sp, #8]
; CHECK-NEXT: str wzr, [sp, #24]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [20 x i8], align 1
%cast = bitcast [20 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 20, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_26_stack() {
; CHECK-LABEL: bzero_26_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp xzr, xzr, [sp]
; CHECK-NEXT: strh wzr, [sp, #24]
; CHECK-NEXT: str xzr, [sp, #16]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [26 x i8], align 1
%cast = bitcast [26 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 26, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_32_stack() {
; CHECK-LABEL: bzero_32_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [32 x i8], align 1
%cast = bitcast [32 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 32, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_40_stack() {
; CHECK-LABEL: bzero_40_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #64
; CHECK-NEXT: .cfi_def_cfa_offset 64
; CHECK-NEXT: str x30, [sp, #48] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str xzr, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #48] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #64
; CHECK-NEXT: ret
%buf = alloca [40 x i8], align 1
%cast = bitcast [40 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 40, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_64_stack() {
; CHECK-LABEL: bzero_64_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: .cfi_def_cfa_offset 80
; CHECK-NEXT: str x30, [sp, #64] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #64] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
%buf = alloca [64 x i8], align 1
%cast = bitcast [64 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 64, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_72_stack() {
; CHECK-LABEL: bzero_72_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #96
; CHECK-NEXT: .cfi_def_cfa_offset 96
; CHECK-NEXT: str x30, [sp, #80] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str xzr, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #80] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #96
; CHECK-NEXT: ret
%buf = alloca [72 x i8], align 1
%cast = bitcast [72 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 72, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_128_stack() {
; CHECK-LABEL: bzero_128_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #144
; CHECK-NEXT: .cfi_def_cfa_offset 144
; CHECK-NEXT: str x30, [sp, #128] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #96]
; CHECK-NEXT: stp q0, q0, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #128] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #144
; CHECK-NEXT: ret
%buf = alloca [128 x i8], align 1
%cast = bitcast [128 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 128, i1 false)
call void @something(i8* %cast)
ret void
}
define void @bzero_256_stack() {
; CHECK-LABEL: bzero_256_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #272
; CHECK-NEXT: .cfi_def_cfa_offset 272
; CHECK-NEXT: stp x29, x30, [sp, #256] // 16-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -8
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: movi v0.2d, #0000000000000000
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #224]
; CHECK-NEXT: stp q0, q0, [sp, #192]
; CHECK-NEXT: stp q0, q0, [sp, #160]
; CHECK-NEXT: stp q0, q0, [sp, #128]
; CHECK-NEXT: stp q0, q0, [sp, #96]
; CHECK-NEXT: stp q0, q0, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldp x29, x30, [sp, #256] // 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #272
; CHECK-NEXT: ret
%buf = alloca [256 x i8], align 1
%cast = bitcast [256 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 0, i32 256, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_4_stack() {
; CHECK-LABEL: memset_4_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov w8, #-1431655766
; CHECK-NEXT: add x0, sp, #12
; CHECK-NEXT: str w8, [sp, #12]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%buf = alloca [4 x i8], align 1
%cast = bitcast [4 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 4, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_8_stack() {
; CHECK-LABEL: memset_8_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: stp x30, x8, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: add x0, sp, #8
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%buf = alloca [8 x i8], align 1
%cast = bitcast [8 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 8, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_12_stack() {
; CHECK-LABEL: memset_12_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #32
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str x8, [sp]
; CHECK-NEXT: str w8, [sp, #8]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #32
; CHECK-NEXT: ret
%buf = alloca [12 x i8], align 1
%cast = bitcast [12 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 12, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_16_stack() {
; CHECK-LABEL: memset_16_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #32
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp x8, x30, [sp, #8] // 8-byte Folded Spill
; CHECK-NEXT: str x8, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #32
; CHECK-NEXT: ret
%buf = alloca [16 x i8], align 1
%cast = bitcast [16 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 16, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_20_stack() {
; CHECK-LABEL: memset_20_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: add x0, sp, #8
; CHECK-NEXT: stp x8, x8, [sp, #8]
; CHECK-NEXT: str w8, [sp, #24]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [20 x i8], align 1
%cast = bitcast [20 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 20, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_26_stack() {
; CHECK-LABEL: memset_26_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp x8, x8, [sp, #8]
; CHECK-NEXT: str x8, [sp]
; CHECK-NEXT: strh w8, [sp, #24]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [26 x i8], align 1
%cast = bitcast [26 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 26, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_32_stack() {
; CHECK-LABEL: memset_32_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #48
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: str x30, [sp, #32] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #32] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
%buf = alloca [32 x i8], align 1
%cast = bitcast [32 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 32, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_40_stack() {
; CHECK-LABEL: memset_40_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #64
; CHECK-NEXT: .cfi_def_cfa_offset 64
; CHECK-NEXT: str x30, [sp, #48] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str x8, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #48] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #64
; CHECK-NEXT: ret
%buf = alloca [40 x i8], align 1
%cast = bitcast [40 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 40, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_64_stack() {
; CHECK-LABEL: memset_64_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: .cfi_def_cfa_offset 80
; CHECK-NEXT: str x30, [sp, #64] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #64] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
%buf = alloca [64 x i8], align 1
%cast = bitcast [64 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 64, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_72_stack() {
; CHECK-LABEL: memset_72_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #96
; CHECK-NEXT: .cfi_def_cfa_offset 96
; CHECK-NEXT: str x30, [sp, #80] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x8, #-6148914691236517206
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: str x8, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #80] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #96
; CHECK-NEXT: ret
%buf = alloca [72 x i8], align 1
%cast = bitcast [72 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 72, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_128_stack() {
; CHECK-LABEL: memset_128_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #144
; CHECK-NEXT: .cfi_def_cfa_offset 144
; CHECK-NEXT: str x30, [sp, #128] // 8-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #96]
; CHECK-NEXT: stp q0, q0, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldr x30, [sp, #128] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #144
; CHECK-NEXT: ret
%buf = alloca [128 x i8], align 1
%cast = bitcast [128 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 128, i1 false)
call void @something(i8* %cast)
ret void
}
define void @memset_256_stack() {
; CHECK-LABEL: memset_256_stack:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #272
; CHECK-NEXT: .cfi_def_cfa_offset 272
; CHECK-NEXT: stp x29, x30, [sp, #256] // 16-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -8
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: movi v0.16b, #170
; CHECK-NEXT: mov x0, sp
; CHECK-NEXT: stp q0, q0, [sp, #224]
; CHECK-NEXT: stp q0, q0, [sp, #192]
; CHECK-NEXT: stp q0, q0, [sp, #160]
; CHECK-NEXT: stp q0, q0, [sp, #128]
; CHECK-NEXT: stp q0, q0, [sp, #96]
; CHECK-NEXT: stp q0, q0, [sp, #64]
; CHECK-NEXT: stp q0, q0, [sp, #32]
; CHECK-NEXT: stp q0, q0, [sp]
; CHECK-NEXT: bl something
; CHECK-NEXT: ldp x29, x30, [sp, #256] // 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #272
; CHECK-NEXT: ret
%buf = alloca [256 x i8], align 1
%cast = bitcast [256 x i8]* %buf to i8*
call void @llvm.memset.p0i8.i32(i8* %cast, i8 -86, i32 256, i1 false)
call void @something(i8* %cast)
ret void
}
declare void @something(i8*)
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1) nounwind
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
Reference in New Issue View Git Blame Copy Permalink