; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc -mtriple aarch64-none-eabi < %s -verify-machineinstrs -enable-post-misched=false | FileCheck %s ; RUN: llc -mtriple aarch64-none-eabi < %s -verify-machineinstrs -enable-post-misched=false -global-isel | FileCheck %s ; Tests for prolog sequences for stack probing, when using a 4KiB stack guard. ; The stack probing parameters in function attributes take precedence over ; ones in the module flags. ; Small stack frame, no probing required. define void @static_64(ptr %out) #0 { ; CHECK-LABEL: static_64: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: sub sp, sp, #64 ; CHECK-NEXT: .cfi_def_cfa_offset 64 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #64 ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 64, align 1 store ptr %v, ptr %out, align 8 ret void } ; At 256 bytes we start to always create a frame pointer. No frame smaller then ; this needs a probe, so we can use the saving of at least one CSR as a probe ; at the top of our frame. define void @static_256(ptr %out) #0 { ; CHECK-LABEL: static_256: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: sub sp, sp, #272 ; CHECK-NEXT: .cfi_def_cfa_offset 272 ; CHECK-NEXT: str x29, [sp, #256] // 8-byte Folded Spill ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #272 ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 256, align 1 store ptr %v, ptr %out, align 8 ret void } ; At 1024 bytes, this is the largest frame which doesn't need probing. define void @static_1024(ptr %out) #0 { ; CHECK-LABEL: static_1024: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 1040 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 1024, align 1 store ptr %v, ptr %out, align 8 ret void } ; At 1024+16 bytes, this is the smallest frame which needs probing. define void @static_1040(ptr %out) #0 { ; CHECK-LABEL: static_1040: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 1056 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 1040, align 1 store ptr %v, ptr %out, align 8 ret void } ; 4k bytes is the largest frame we can probe in one go. define void @static_4096(ptr %out) #0 { ; CHECK-LABEL: static_4096: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 4096, align 1 store ptr %v, ptr %out, align 8 ret void } ; 4k+16 bytes, still needs just one probe. define void @static_4112(ptr %out) #0 { ; CHECK-LABEL: static_4112: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp], #-16 ; CHECK-NEXT: .cfi_def_cfa_offset 4128 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 32 ; CHECK-NEXT: add sp, sp, #16 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 4112, align 1 store ptr %v, ptr %out, align 8 ret void } ; 4k+1024 bytes, the largest frame which needs just one probe. define void @static_5120(ptr %out) #0 { ; CHECK-LABEL: static_5120: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 5136 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 1040 ; CHECK-NEXT: add sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 5120, align 1 store ptr %v, ptr %out, align 8 ret void } ; 4k+1024+16, the smallest frame which needs two probes. define void @static_5136(ptr %out) #0 { ; CHECK-LABEL: static_5136: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 5152 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 1056 ; CHECK-NEXT: add sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 5136, align 1 store ptr %v, ptr %out, align 8 ret void } ; 2*4k+1024, the largest frame needing two probes define void @static_9216(ptr %out) #0 { ; CHECK-LABEL: static_9216: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 8208 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 9232 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #2, lsl #12 // =8192 ; CHECK-NEXT: .cfi_def_cfa_offset 1040 ; CHECK-NEXT: add sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 9216, align 1 store ptr %v, ptr %out, align 8 ret void } ; 5*4k-16, the largest frame probed without a loop define void @static_20464(ptr %out) #0 { ; CHECK-LABEL: static_20464: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 4112 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 8208 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 12304 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: .cfi_def_cfa_offset 16400 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: sub sp, sp, #4080 ; CHECK-NEXT: .cfi_def_cfa_offset 20480 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #4, lsl #12 // =16384 ; CHECK-NEXT: .cfi_def_cfa_offset 4096 ; CHECK-NEXT: add sp, sp, #4080 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 20464, align 1 store ptr %v, ptr %out, align 8 ret void } ; 5*4k, the smallest frame probed with a loop define void @static_20480(ptr %out) #0 { ; CHECK-LABEL: static_20480: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa w9, 20496 ; CHECK-NEXT: .LBB10_1: // %entry ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: cmp sp, x9 ; CHECK-NEXT: b.ne .LBB10_1 ; CHECK-NEXT: // %bb.2: // %entry ; CHECK-NEXT: .cfi_def_cfa_register wsp ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 20480, align 1 store ptr %v, ptr %out, align 8 ret void } ; 5*4k + 1024, large enough to use a loop, but not a multiple of 4KiB ; so has a reminder, but no extra probe. define void @static_21504(ptr %out) #0 { ; CHECK-LABEL: static_21504: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa w9, 20496 ; CHECK-NEXT: .LBB11_1: // %entry ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: cmp sp, x9 ; CHECK-NEXT: b.ne .LBB11_1 ; CHECK-NEXT: // %bb.2: // %entry ; CHECK-NEXT: .cfi_def_cfa_register wsp ; CHECK-NEXT: sub sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 21520 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa_offset 1040 ; CHECK-NEXT: add sp, sp, #1024 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 21504, align 1 store ptr %v, ptr %out, align 8 ret void } ; 5*4k+1040, large enough to use a loop, has a reminder and ; an extra probe. define void @static_21520(ptr %out) #0 { ; CHECK-LABEL: static_21520: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa w9, 20496 ; CHECK-NEXT: .LBB12_1: // %entry ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: cmp sp, x9 ; CHECK-NEXT: b.ne .LBB12_1 ; CHECK-NEXT: // %bb.2: // %entry ; CHECK-NEXT: .cfi_def_cfa_register wsp ; CHECK-NEXT: sub sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 21536 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #5, lsl #12 // =20480 ; CHECK-NEXT: .cfi_def_cfa_offset 1056 ; CHECK-NEXT: add sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 21520, align 1 store ptr %v, ptr %out, align 8 ret void } ; A small allocation, but with a very large alignment requirement. We do this ; by moving SP far enough that a sufficiently-aligned block will exist ; somewhere in the stack frame, so must probe the whole of that larger SP move. define void @static_16_align_8192(ptr %out) #0 { ; CHECK-LABEL: static_16_align_8192: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: mov x29, sp ; CHECK-NEXT: .cfi_def_cfa w29, 16 ; CHECK-NEXT: .cfi_offset w30, -8 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: sub x9, x9, #4080 ; CHECK-NEXT: and x9, x9, #0xffffffffffffe000 ; CHECK-NEXT: .LBB13_1: // %entry ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: sub sp, sp, #1, lsl #12 // =4096 ; CHECK-NEXT: cmp sp, x9 ; CHECK-NEXT: b.le .LBB13_3 ; CHECK-NEXT: // %bb.2: // %entry ; CHECK-NEXT: // in Loop: Header=BB13_1 Depth=1 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: b .LBB13_1 ; CHECK-NEXT: .LBB13_3: // %entry ; CHECK-NEXT: mov sp, x9 ; CHECK-NEXT: ldr xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: mov sp, x29 ; CHECK-NEXT: .cfi_def_cfa wsp, 16 ; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 16, align 8192 store ptr %v, ptr %out, align 8 ret void } ; A small allocation with a very large alignment requirement, but ; nevertheless small enough as to not need a loop. define void @static_16_align_2048(ptr %out) #0 { ; CHECK-LABEL: static_16_align_2048: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: mov x29, sp ; CHECK-NEXT: .cfi_def_cfa w29, 16 ; CHECK-NEXT: .cfi_offset w30, -8 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #2032 ; CHECK-NEXT: and sp, x9, #0xfffffffffffff800 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: mov sp, x29 ; CHECK-NEXT: .cfi_def_cfa wsp, 16 ; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 16, align 2048 store ptr %v, ptr %out, align 8 ret void } ; A large(-ish) allocation with a very large alignment requirement, but ; nevertheless small enough as to not need a loop. define void @static_2032_align_2048(ptr %out) #0 { ; CHECK-LABEL: static_2032_align_2048: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: mov x29, sp ; CHECK-NEXT: .cfi_def_cfa w29, 16 ; CHECK-NEXT: .cfi_offset w30, -8 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #2032 ; CHECK-NEXT: and sp, x9, #0xfffffffffffff800 ; CHECK-NEXT: str xzr, [sp] ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: mov sp, x29 ; CHECK-NEXT: .cfi_def_cfa wsp, 16 ; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 2032, align 2048 store ptr %v, ptr %out, align 8 ret void } ; Test stack probing is enabled by module flags define void @static_9232(ptr %out) uwtable(async) { ; CHECK-LABEL: static_9232: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub sp, sp, #2, lsl #12 // =8192 ; CHECK-NEXT: .cfi_def_cfa_offset 8208 ; CHECK-NEXT: sub sp, sp, #800 ; CHECK-NEXT: .cfi_def_cfa_offset 9008 ; CHECK-NEXT: str xzr, [sp], #-240 ; CHECK-NEXT: .cfi_def_cfa_offset 9248 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: add sp, sp, #2, lsl #12 // =8192 ; CHECK-NEXT: .cfi_def_cfa_offset 1056 ; CHECK-NEXT: add sp, sp, #1040 ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i64 9232, align 1 store ptr %v, ptr %out, align 8 ret void } ; Test for a tight upper bound on the amount of stack adjustment ; due to stack realignment. No probes should appear. define void @static_1008(ptr %out) #0 { ; CHECK-LABEL: static_1008: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: mov x29, sp ; CHECK-NEXT: .cfi_def_cfa w29, 16 ; CHECK-NEXT: .cfi_offset w30, -8 ; CHECK-NEXT: .cfi_offset w29, -16 ; CHECK-NEXT: sub x9, sp, #1008 ; CHECK-NEXT: and sp, x9, #0xffffffffffffffe0 ; CHECK-NEXT: mov x8, sp ; CHECK-NEXT: str x8, [x0] ; CHECK-NEXT: mov sp, x29 ; CHECK-NEXT: .cfi_def_cfa wsp, 16 ; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore w29 ; CHECK-NEXT: ret entry: %v = alloca i8, i32 1008, align 32 store ptr %v, ptr %out, align 8 ret void } attributes #0 = { uwtable(async) "probe-stack"="inline-asm" "stack-probe-size"="4096" "frame-pointer"="none" } !llvm.module.flags = !{!0, !1} !0 = !{i32 4, !"probe-stack", !"inline-asm"} !1 = !{i32 8, !"stack-probe-size", i32 9000}