llvm-6502/test/CodeGen/Thumb2/large-stack.ll
Peter Collingbourne f86c29ea2c ARM: When spilling extra registers for alignment, prefer low registers on all Thumb targets.
This makes it more likely that we can use the 16-bit push and pop instructions
on Thumb-2, saving around 4 bytes per function.

Differential Revision: http://reviews.llvm.org/D9165

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235637 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-23 20:31:26 +00:00

42 lines
1.1 KiB
LLVM

; RUN: llc < %s -march=thumb -mcpu=arm1156t2-s -mattr=+thumb2 \
; RUN: -mtriple=arm-apple-darwin | FileCheck %s -check-prefix=DARWIN
; RUN: llc < %s -march=thumb -mcpu=arm1156t2-s -mattr=+thumb2 \
; RUN: -mtriple=arm-linux-gnueabi | FileCheck %s -check-prefix=LINUX
define void @test1() {
; DARWIN-LABEL: test1:
; DARWIN: sub sp, #256
; LINUX-LABEL: test1:
; LINUX: sub sp, #256
%tmp = alloca [ 64 x i32 ] , align 4
ret void
}
define void @test2() {
; DARWIN-LABEL: test2:
; DARWIN: sub.w sp, sp, #4160
; DARWIN: sub sp, #8
; LINUX-LABEL: test2:
; LINUX: sub.w sp, sp, #4160
; LINUX: sub sp, #8
%tmp = alloca [ 4168 x i8 ] , align 4
ret void
}
define i32 @test3() {
; DARWIN-LABEL: test3:
; DARWIN: push {r4, r7, lr}
; DARWIN: sub.w sp, sp, #805306368
; DARWIN: sub sp, #20
; LINUX-LABEL: test3:
; LINUX: push {r4, r6, r7, lr}
; LINUX: sub.w sp, sp, #805306368
; LINUX: sub sp, #16
%retval = alloca i32, align 4
%tmp = alloca i32, align 4
%a = alloca [805306369 x i8], align 16
store i32 0, i32* %tmp
%tmp1 = load i32, i32* %tmp
ret i32 %tmp1
}