1d0ccebcd7
Assuming that the stack grows downwards, it is fine if the stack pointer is exactly at the stacklet boundary. We should use less-or-equal condition when deciding whether to skip new memory allocation. Differential Revision: https://reviews.llvm.org/D149315
195 lines
5.2 KiB
LLVM
195 lines
5.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=thumb-linux-androideabi -mcpu=arm1156t2-s -mattr=+thumb2 -verify-machineinstrs | FileCheck %s -check-prefix=THUMB
|
|
; RUN: llc < %s -mtriple=arm-linux-androideabi -mcpu=arm1156t2-s -verify-machineinstrs | FileCheck %s -check-prefix=ARM
|
|
|
|
|
|
; Just to prevent the alloca from being optimized away
|
|
declare void @dummy_use(ptr, i32)
|
|
|
|
define void @test_basic() #0 {
|
|
; THUMB-LABEL: test_basic:
|
|
; THUMB: @ %bb.0:
|
|
; THUMB-NEXT: push {r4, r5}
|
|
; THUMB-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; THUMB-NEXT: mov r5, sp
|
|
; THUMB-NEXT: ldr.w r4, [r4, #252]
|
|
; THUMB-NEXT: cmp r4, r5
|
|
; THUMB-NEXT: bls .LBB0_2
|
|
; THUMB-NEXT: @ %bb.1:
|
|
; THUMB-NEXT: mov r4, #48
|
|
; THUMB-NEXT: mov r5, #0
|
|
; THUMB-NEXT: push {lr}
|
|
; THUMB-NEXT: bl __morestack
|
|
; THUMB-NEXT: ldr lr, [sp], #4
|
|
; THUMB-NEXT: pop {r4, r5}
|
|
; THUMB-NEXT: bx lr
|
|
; THUMB-NEXT: .LBB0_2:
|
|
; THUMB-NEXT: pop {r4, r5}
|
|
; THUMB-NEXT: .save {r7, lr}
|
|
; THUMB-NEXT: push {r7, lr}
|
|
; THUMB-NEXT: .pad #40
|
|
; THUMB-NEXT: sub sp, #40
|
|
; THUMB-NEXT: mov r0, sp
|
|
; THUMB-NEXT: movs r1, #10
|
|
; THUMB-NEXT: bl dummy_use
|
|
; THUMB-NEXT: add sp, #40
|
|
; THUMB-NEXT: pop {r7, pc}
|
|
;
|
|
; ARM-LABEL: test_basic:
|
|
; ARM: @ %bb.0:
|
|
; ARM-NEXT: push {r4, r5}
|
|
; ARM-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; ARM-NEXT: mov r5, sp
|
|
; ARM-NEXT: ldr r4, [r4, #252]
|
|
; ARM-NEXT: cmp r4, r5
|
|
; ARM-NEXT: bls .LBB0_2
|
|
; ARM-NEXT: @ %bb.1:
|
|
; ARM-NEXT: mov r4, #48
|
|
; ARM-NEXT: mov r5, #0
|
|
; ARM-NEXT: stmdb sp!, {lr}
|
|
; ARM-NEXT: bl __morestack
|
|
; ARM-NEXT: ldm sp!, {lr}
|
|
; ARM-NEXT: pop {r4, r5}
|
|
; ARM-NEXT: bx lr
|
|
; ARM-NEXT: .LBB0_2:
|
|
; ARM-NEXT: pop {r4, r5}
|
|
; ARM-NEXT: .save {r11, lr}
|
|
; ARM-NEXT: push {r11, lr}
|
|
; ARM-NEXT: .pad #40
|
|
; ARM-NEXT: sub sp, sp, #40
|
|
; ARM-NEXT: mov r0, sp
|
|
; ARM-NEXT: mov r1, #10
|
|
; ARM-NEXT: bl dummy_use
|
|
; ARM-NEXT: add sp, sp, #40
|
|
; ARM-NEXT: pop {r11, pc}
|
|
%mem = alloca i32, i32 10
|
|
call void @dummy_use (ptr %mem, i32 10)
|
|
ret void
|
|
}
|
|
|
|
define void @test_large() #0 {
|
|
%mem = alloca i32, i32 10000
|
|
call void @dummy_use (ptr %mem, i32 0)
|
|
ret void
|
|
|
|
; THUMB-LABEL: test_large:
|
|
|
|
; THUMB: push {r4, r5}
|
|
; THUMB-NEXT: movw r4, #40192
|
|
; THUMB-NEXT: mov r5, sp
|
|
; THUMB-NEXT: movt r4, #0
|
|
; THUMB-NEXT: sub r5, r5, r4
|
|
; THUMB-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; THUMB-NEXT: ldr.w r4, [r4, #252]
|
|
; THUMB-NEXT: cmp r4, r5
|
|
; THUMB-NEXT: bls .LBB1_2
|
|
|
|
; THUMB: movw r4, #40192
|
|
; THUMB-NEXT: movt r4, #0
|
|
; THUMB-NEXT: mov r5, #0
|
|
; THUMB-NEXT: push {lr}
|
|
; THUMB-NEXT: bl __morestack
|
|
; THUMB-NEXT: ldr lr, [sp], #4
|
|
; THUMB-NEXT: pop {r4, r5}
|
|
; THUMB-NEXT: bx lr
|
|
|
|
; THUMB: pop {r4, r5}
|
|
|
|
|
|
; ARM-LABEL: test_large:
|
|
|
|
; ARM: push {r4, r5}
|
|
; ARM-NEXT: ldr r4, .LCPI1_0
|
|
; ARM-NEXT: sub r5, sp, r4
|
|
; ARM-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; ARM-NEXT: ldr r4, [r4, #252]
|
|
; ARM-NEXT: cmp r4, r5
|
|
; ARM-NEXT: bls .LBB1_2
|
|
|
|
; ARM: ldr r4, .LCPI1_0
|
|
; ARM-NEXT: mov r5, #0
|
|
; ARM-NEXT: stmdb sp!, {lr}
|
|
; ARM-NEXT: bl __morestack
|
|
; ARM-NEXT: ldm sp!, {lr}
|
|
; ARM-NEXT: pop {r4, r5}
|
|
; ARM-NEXT: bx lr
|
|
|
|
; ARM: pop {r4, r5}
|
|
|
|
; ARM: .LCPI1_0:
|
|
; ARM-NEXT: .long 40192
|
|
|
|
}
|
|
|
|
define fastcc void @test_fastcc_large() #0 {
|
|
%mem = alloca i32, i32 10000
|
|
call void @dummy_use (ptr %mem, i32 0)
|
|
ret void
|
|
|
|
; THUMB-LABEL: test_fastcc_large:
|
|
|
|
; THUMB: push {r4, r5}
|
|
; THUMB-NEXT: movw r4, #40192
|
|
; THUMB-NEXT: mov r5, sp
|
|
; THUMB-NEXT: movt r4, #0
|
|
; THUMB-NEXT: sub r5, r5, r4
|
|
; THUMB-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; THUMB-NEXT: ldr.w r4, [r4, #252]
|
|
; THUMB-NEXT: cmp r4, r5
|
|
; THUMB-NEXT: bls .LBB2_2
|
|
|
|
; THUMB: movw r4, #40192
|
|
; THUMB-NEXT: movt r4, #0
|
|
; THUMB-NEXT: mov r5, #0
|
|
; THUMB-NEXT: push {lr}
|
|
; THUMB-NEXT: bl __morestack
|
|
; THUMB-NEXT: ldr lr, [sp], #4
|
|
; THUMB-NEXT: pop {r4, r5}
|
|
; THUMB-NEXT: bx lr
|
|
|
|
; THUMB: pop {r4, r5}
|
|
|
|
; ARM-LABEL: test_fastcc_large:
|
|
|
|
; ARM: push {r4, r5}
|
|
; ARM-NEXT: ldr r4, .LCPI2_0
|
|
; ARM-NEXT: sub r5, sp, r4
|
|
; ARM-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; ARM-NEXT: ldr r4, [r4, #252]
|
|
; ARM-NEXT: cmp r4, r5
|
|
; ARM-NEXT: bls .LBB2_2
|
|
|
|
; ARM: ldr r4, .LCPI2_0
|
|
; ARM-NEXT: mov r5, #0
|
|
; ARM-NEXT: stmdb sp!, {lr}
|
|
; ARM-NEXT: bl __morestack
|
|
; ARM-NEXT: ldm sp!, {lr}
|
|
; ARM-NEXT: pop {r4, r5}
|
|
; ARM-NEXT: bx lr
|
|
|
|
; ARM: .LCPI2_0:
|
|
; ARM-NEXT: .long 40192
|
|
}
|
|
|
|
|
|
declare void @panic() unnamed_addr
|
|
|
|
; We used to crash while compiling the following function.
|
|
; THUMB-LABEL: build_should_not_segfault:
|
|
; ARM-LABEL: build_should_not_segfault:
|
|
define void @build_should_not_segfault(i8 %x) unnamed_addr #0 {
|
|
start:
|
|
%_0 = icmp ult i8 %x, 16
|
|
%or.cond = select i1 undef, i1 true, i1 %_0
|
|
br i1 %or.cond, label %bb1, label %bb2
|
|
|
|
bb1:
|
|
ret void
|
|
|
|
bb2:
|
|
call void @panic()
|
|
unreachable
|
|
}
|
|
|
|
attributes #0 = { "split-stack" }
|