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llvm-mirror/test/CodeGen/ARM/segmented-stacks.ll
Tim Northover 6877f3a322 Segmented stacks: omit __morestack call when there's no frame. 
Patch by Florian Zeitz

llvm-svn: 209436
2014-05-22 13:03:43 +00:00

250 lines
6.9 KiB
LLVM
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; RUN: llc < %s -mtriple=arm-linux-androideabi -verify-machineinstrs | FileCheck %s -check-prefix=ARM-android
; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -verify-machineinstrs | FileCheck %s -check-prefix=ARM-linux
; We used to crash with filetype=obj
; RUN: llc < %s -mtriple=arm-linux-androideabi -filetype=obj
; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -filetype=obj
; Just to prevent the alloca from being optimized away
declare void @dummy_use(i32*, i32)
define void @test_basic() #0 {
%mem = alloca i32, i32 10
call void @dummy_use (i32* %mem, i32 10)
ret void
; ARM-linux: test_basic:
; ARM-linux: push {r4, r5}
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-linux-NEXT: mov r5, sp
; ARM-linux-NEXT: ldr r4, [r4, #4]
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB0_2
; ARM-linux: mov r4, #48
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
; ARM-linux-NEXT: ldm sp!, {lr}
; ARM-linux-NEXT: pop {r4, r5}
; ARM-linux-NEXT: bx lr
; ARM-linux: pop {r4, r5}
; ARM-android: test_basic:
; ARM-android: push {r4, r5}
; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-android-NEXT: mov r5, sp
; ARM-android-NEXT: ldr r4, [r4, #252]
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB0_2
; ARM-android: mov r4, #48
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
; ARM-android-NEXT: ldm sp!, {lr}
; ARM-android-NEXT: pop {r4, r5}
; ARM-android-NEXT: bx lr
; ARM-android: pop {r4, r5}
}
define i32 @test_nested(i32 * nest %closure, i32 %other) #0 {
%addend = load i32 * %closure
%result = add i32 %other, %addend
%mem = alloca i32, i32 10
call void @dummy_use (i32* %mem, i32 10)
ret i32 %result
; ARM-linux: test_nested:
; ARM-linux: push {r4, r5}
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-linux-NEXT: mov r5, sp
; ARM-linux-NEXT: ldr r4, [r4, #4]
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB1_2
; ARM-linux: mov r4, #56
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
; ARM-linux-NEXT: ldm sp!, {lr}
; ARM-linux-NEXT: pop {r4, r5}
; ARM-linux-NEXT: bx lr
; ARM-linux: pop {r4, r5}
; ARM-android: test_nested:
; ARM-android: push {r4, r5}
; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-android-NEXT: mov r5, sp
; ARM-android-NEXT: ldr r4, [r4, #252]
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB1_2
; ARM-android: mov r4, #56
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
; ARM-android-NEXT: ldm sp!, {lr}
; ARM-android-NEXT: pop {r4, r5}
; ARM-android-NEXT: bx lr
; ARM-android: pop {r4, r5}
}
define void @test_large() #0 {
%mem = alloca i32, i32 10000
call void @dummy_use (i32* %mem, i32 0)
ret void
; ARM-linux: test_large:
; ARM-linux: push {r4, r5}
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-linux-NEXT: sub r5, sp, #40192
; ARM-linux-NEXT: ldr r4, [r4, #4]
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB2_2
; ARM-linux: mov r4, #40192
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
; ARM-linux-NEXT: ldm sp!, {lr}
; ARM-linux-NEXT: pop {r4, r5}
; ARM-linux-NEXT: bx lr
; ARM-linux: pop {r4, r5}
; ARM-android: test_large:
; ARM-android: push {r4, r5}
; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-android-NEXT: sub r5, sp, #40192
; ARM-android-NEXT: ldr r4, [r4, #252]
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB2_2
; ARM-android: mov r4, #40192
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
; ARM-android-NEXT: ldm sp!, {lr}
; ARM-android-NEXT: pop {r4, r5}
; ARM-android-NEXT: bx lr
; ARM-android: pop {r4, r5}
}
define fastcc void @test_fastcc() #0 {
%mem = alloca i32, i32 10
call void @dummy_use (i32* %mem, i32 10)
ret void
; ARM-linux: test_fastcc:
; ARM-linux: push {r4, r5}
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-linux-NEXT: mov r5, sp
; ARM-linux-NEXT: ldr r4, [r4, #4]
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB3_2
; ARM-linux: mov r4, #48
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
; ARM-linux-NEXT: ldm sp!, {lr}
; ARM-linux-NEXT: pop {r4, r5}
; ARM-linux-NEXT: bx lr
; ARM-linux: pop {r4, r5}
; ARM-android: test_fastcc:
; ARM-android: push {r4, r5}
; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-android-NEXT: mov r5, sp
; ARM-android-NEXT: ldr r4, [r4, #252]
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB3_2
; ARM-android: mov r4, #48
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
; ARM-android-NEXT: ldm sp!, {lr}
; ARM-android-NEXT: pop {r4, r5}
; ARM-android-NEXT: bx lr
; ARM-android: pop {r4, r5}
}
define fastcc void @test_fastcc_large() #0 {
%mem = alloca i32, i32 10000
call void @dummy_use (i32* %mem, i32 0)
ret void
; ARM-linux: test_fastcc_large:
; ARM-linux: push {r4, r5}
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-linux-NEXT: sub r5, sp, #40192
; ARM-linux-NEXT: ldr r4, [r4, #4]
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB4_2
; ARM-linux: mov r4, #40192
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
; ARM-linux-NEXT: ldm sp!, {lr}
; ARM-linux-NEXT: pop {r4, r5}
; ARM-linux-NEXT: bx lr
; ARM-linux: pop {r4, r5}
; ARM-android: test_fastcc_large:
; ARM-android: push {r4, r5}
; ARM-android-NEXT: mrc p15, #0, r4, c13, c0, #3
; ARM-android-NEXT: sub r5, sp, #40192
; ARM-android-NEXT: ldr r4, [r4, #252]
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB4_2
; ARM-android: mov r4, #40192
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
; ARM-android-NEXT: ldm sp!, {lr}
; ARM-android-NEXT: pop {r4, r5}
; ARM-android-NEXT: bx lr
; ARM-android: pop {r4, r5}
}
define void @test_nostack() #0 {
ret void
; ARM-linux-LABEL: test_nostack:
; ARM-linux-NOT: bl __morestack
; ARM-android-LABEL: test_nostack:
; ARM-android-NOT: bl __morestack
}
attributes #0 = { "split-stack" }
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