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
304 lines
8.2 KiB
LLVM
304 lines
8.2 KiB
LLVM
; RUN: llc < %s -mtriple=arm-linux-androideabi -mattr=+v4t -verify-machineinstrs | FileCheck %s -check-prefix=ARM-android
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; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -mattr=+v4t -verify-machineinstrs | FileCheck %s -check-prefix=ARM-linux
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; We used to crash with filetype=obj
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; RUN: llc < %s -mtriple=arm-linux-androideabi -filetype=obj
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; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -filetype=obj
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; Just to prevent the alloca from being optimized away
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declare void @dummy_use(ptr, i32)
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define void @test_basic() #0 {
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%mem = alloca i32, i32 10
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call void @dummy_use (ptr %mem, i32 10)
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ret void
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; ARM-linux-LABEL: test_basic:
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; ARM-linux: push {r4, r5}
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; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-linux-NEXT: mov r5, sp
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; ARM-linux-NEXT: ldr r4, [r4, #4]
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; ARM-linux-NEXT: cmp r4, r5
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; ARM-linux-NEXT: bls .LBB0_2
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; ARM-linux: mov r4, #48
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; ARM-linux-NEXT: mov r5, #0
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; ARM-linux-NEXT: stmdb sp!, {lr}
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; ARM-linux-NEXT: bl __morestack
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; ARM-linux-NEXT: ldm sp!, {lr}
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; ARM-linux-NEXT: pop {r4, r5}
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; ARM-linux-NEXT: bx lr
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; ARM-linux: pop {r4, r5}
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; ARM-android-LABEL: test_basic:
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; ARM-android: push {r4, r5}
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; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-android-NEXT: mov r5, sp
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; ARM-android-NEXT: ldr r4, [r4, #252]
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; ARM-android-NEXT: cmp r4, r5
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; ARM-android-NEXT: bls .LBB0_2
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; ARM-android: mov r4, #48
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; ARM-android-NEXT: mov r5, #0
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; ARM-android-NEXT: stmdb sp!, {lr}
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; ARM-android-NEXT: bl __morestack
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; ARM-android-NEXT: ldm sp!, {lr}
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; ARM-android-NEXT: pop {r4, r5}
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; ARM-android-NEXT: bx lr
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; ARM-android: pop {r4, r5}
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}
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define i32 @test_nested(ptr nest %closure, i32 %other) #0 {
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%addend = load i32 , ptr %closure
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%result = add i32 %other, %addend
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%mem = alloca i32, i32 10
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call void @dummy_use (ptr %mem, i32 10)
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ret i32 %result
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; ARM-linux-LABEL: test_nested:
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; ARM-linux: push {r4, r5}
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; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-linux-NEXT: mov r5, sp
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; ARM-linux-NEXT: ldr r4, [r4, #4]
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; ARM-linux-NEXT: cmp r4, r5
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; ARM-linux-NEXT: bls .LBB1_2
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; ARM-linux: mov r4, #56
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; ARM-linux-NEXT: mov r5, #0
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; ARM-linux-NEXT: stmdb sp!, {lr}
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; ARM-linux-NEXT: bl __morestack
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; ARM-linux-NEXT: ldm sp!, {lr}
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; ARM-linux-NEXT: pop {r4, r5}
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; ARM-linux-NEXT: bx lr
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; ARM-linux: pop {r4, r5}
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; ARM-android-LABEL: test_nested:
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; ARM-android: push {r4, r5}
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; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-android-NEXT: mov r5, sp
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; ARM-android-NEXT: ldr r4, [r4, #252]
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; ARM-android-NEXT: cmp r4, r5
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; ARM-android-NEXT: bls .LBB1_2
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; ARM-android: mov r4, #56
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; ARM-android-NEXT: mov r5, #0
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; ARM-android-NEXT: stmdb sp!, {lr}
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; ARM-android-NEXT: bl __morestack
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; ARM-android-NEXT: ldm sp!, {lr}
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; ARM-android-NEXT: pop {r4, r5}
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; ARM-android-NEXT: bx lr
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; ARM-android: pop {r4, r5}
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}
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define void @test_large() #0 {
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%mem = alloca i32, i32 10000
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call void @dummy_use (ptr %mem, i32 0)
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ret void
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; ARM-linux-LABEL: test_large:
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; ARM-linux: push {r4, r5}
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; ARM-linux-NEXT: ldr r4, .LCPI2_0
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; ARM-linux-NEXT: sub r5, sp, r4
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; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-linux-NEXT: ldr r4, [r4, #4]
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; ARM-linux-NEXT: cmp r4, r5
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; ARM-linux-NEXT: bls .LBB2_2
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; ARM-linux: ldr r4, .LCPI2_0
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; ARM-linux-NEXT: mov r5, #0
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; ARM-linux-NEXT: stmdb sp!, {lr}
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; ARM-linux-NEXT: bl __morestack
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; ARM-linux-NEXT: ldm sp!, {lr}
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; ARM-linux-NEXT: pop {r4, r5}
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; ARM-linux-NEXT: bx lr
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; ARM-linux: pop {r4, r5}
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; ARM-linux: .LCPI2_0:
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; ARM-linux-NEXT: .long 40192
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; ARM-android-LABEL: test_large:
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; ARM-android: push {r4, r5}
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; ARM-android-NEXT: ldr r4, .LCPI2_0
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; ARM-android-NEXT: sub r5, sp, r4
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; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-android-NEXT: ldr r4, [r4, #252]
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; ARM-android-NEXT: cmp r4, r5
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; ARM-android-NEXT: bls .LBB2_2
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; ARM-android: ldr r4, .LCPI2_0
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; ARM-android-NEXT: mov r5, #0
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; ARM-android-NEXT: stmdb sp!, {lr}
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; ARM-android-NEXT: bl __morestack
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; ARM-android-NEXT: ldm sp!, {lr}
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; ARM-android-NEXT: pop {r4, r5}
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; ARM-android-NEXT: bx lr
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; ARM-android: pop {r4, r5}
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; ARM-android: .LCPI2_0:
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; ARM-android-NEXT: .long 40192
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}
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define fastcc void @test_fastcc() #0 {
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%mem = alloca i32, i32 10
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call void @dummy_use (ptr %mem, i32 10)
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ret void
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; ARM-linux-LABEL: test_fastcc:
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; ARM-linux: push {r4, r5}
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; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-linux-NEXT: mov r5, sp
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; ARM-linux-NEXT: ldr r4, [r4, #4]
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; ARM-linux-NEXT: cmp r4, r5
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; ARM-linux-NEXT: bls .LBB3_2
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; ARM-linux: mov r4, #48
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; ARM-linux-NEXT: mov r5, #0
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; ARM-linux-NEXT: stmdb sp!, {lr}
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; ARM-linux-NEXT: bl __morestack
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; ARM-linux-NEXT: ldm sp!, {lr}
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; ARM-linux-NEXT: pop {r4, r5}
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; ARM-linux-NEXT: bx lr
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; ARM-linux: pop {r4, r5}
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; ARM-android-LABEL: test_fastcc:
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; ARM-android: push {r4, r5}
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; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-android-NEXT: mov r5, sp
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; ARM-android-NEXT: ldr r4, [r4, #252]
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; ARM-android-NEXT: cmp r4, r5
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; ARM-android-NEXT: bls .LBB3_2
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; ARM-android: mov r4, #48
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; ARM-android-NEXT: mov r5, #0
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; ARM-android-NEXT: stmdb sp!, {lr}
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; ARM-android-NEXT: bl __morestack
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; ARM-android-NEXT: ldm sp!, {lr}
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; ARM-android-NEXT: pop {r4, r5}
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; ARM-android-NEXT: bx lr
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; ARM-android: pop {r4, r5}
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}
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define fastcc void @test_fastcc_large() #0 {
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%mem = alloca i32, i32 10000
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call void @dummy_use (ptr %mem, i32 0)
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ret void
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; ARM-linux-LABEL: test_fastcc_large:
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; ARM-linux: push {r4, r5}
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; ARM-linux-NEXT: ldr r4, .LCPI4_0
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; ARM-linux-NEXT: sub r5, sp, r4
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; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-linux-NEXT: ldr r4, [r4, #4]
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; ARM-linux-NEXT: cmp r4, r5
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; ARM-linux-NEXT: bls .LBB4_2
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; ARM-linux: ldr r4, .LCPI4_0
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; ARM-linux-NEXT: mov r5, #0
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; ARM-linux-NEXT: stmdb sp!, {lr}
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; ARM-linux-NEXT: bl __morestack
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; ARM-linux-NEXT: ldm sp!, {lr}
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; ARM-linux-NEXT: pop {r4, r5}
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; ARM-linux-NEXT: bx lr
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; ARM-linux: pop {r4, r5}
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; ARM-linux: .LCPI4_0:
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; ARM-linux-NEXT: .long 40192
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; ARM-android-LABEL: test_fastcc_large:
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; ARM-android: push {r4, r5}
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; ARM-android-NEXT: ldr r4, .LCPI4_0
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; ARM-android-NEXT: sub r5, sp, r4
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; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
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; ARM-android-NEXT: ldr r4, [r4, #252]
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; ARM-android-NEXT: cmp r4, r5
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; ARM-android-NEXT: bls .LBB4_2
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; ARM-android: ldr r4, .LCPI4_0
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; ARM-android-NEXT: mov r5, #0
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; ARM-android-NEXT: stmdb sp!, {lr}
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; ARM-android-NEXT: bl __morestack
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; ARM-android-NEXT: ldm sp!, {lr}
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; ARM-android-NEXT: pop {r4, r5}
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; ARM-android-NEXT: bx lr
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; ARM-android: pop {r4, r5}
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; ARM-android: .LCPI4_0:
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; ARM-android-NEXT: .long 40192
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}
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define void @test_nostack() #0 {
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ret void
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; ARM-linux-LABEL: test_nostack:
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; ARM-linux-NOT: bl __morestack
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; ARM-android-LABEL: test_nostack:
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; ARM-android-NOT: bl __morestack
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}
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; Test to make sure that a morestack call is generated if there is a
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; sibling call, even if the function in question has no stack frame
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; (PR37807).
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declare i32 @callee(i32)
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define i32 @test_sibling_call_empty_frame(i32 %x) #0 {
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%call = tail call i32 @callee(i32 %x) #0
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ret i32 %call
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; ARM-linux-LABEL: test_sibling_call_empty_frame:
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; ARM-linux: bl __morestack
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; ARM-android-LABEL: test_sibling_call_empty_frame:
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; ARM-android: bl __morestack
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}
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declare void @panic() unnamed_addr
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; We used to crash while compiling the following function.
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; ARM-linux-LABEL: build_should_not_segfault:
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; ARM-android-LABEL: build_should_not_segfault:
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define void @build_should_not_segfault(i8 %x) unnamed_addr #0 {
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start:
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%_0 = icmp ult i8 %x, 16
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%or.cond = select i1 undef, i1 true, i1 %_0
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br i1 %or.cond, label %bb1, label %bb2
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bb1:
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ret void
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bb2:
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call void @panic()
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unreachable
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}
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attributes #0 = { "split-stack" }
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