mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 06:54:54 +00:00
This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.2 KiB
LLVM
111 lines
3.2 KiB
LLVM
; Test the allocation of frames in cases where we do not need to save
|
|
; registers in the prologue.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; The CFA offset is 160 (the caller-allocated part of the frame) + 168.
|
|
define void @f1(i64 %x) {
|
|
; CHECK: f1:
|
|
; CHECK: aghi %r15, -168
|
|
; CHECK: .cfi_def_cfa_offset 328
|
|
; CHECK: stg %r2, 160(%r15)
|
|
; CHECK: aghi %r15, 168
|
|
; CHECK: br %r14
|
|
%y = alloca i64, align 8
|
|
store volatile i64 %x, i64* %y
|
|
ret void
|
|
}
|
|
|
|
; Check frames of size 32760, which is the largest size that can be both
|
|
; allocated and freed using AGHI. This size is big enough to require
|
|
; an emergency spill slot at 160(%r15), for instructions with unsigned
|
|
; 12-bit offsets that end up being out of range. Fill the remaining
|
|
; 32760 - 168 bytes by allocating (32760 - 168) / 8 = 4074 doublewords.
|
|
define void @f2(i64 %x) {
|
|
; CHECK: f2:
|
|
; CHECK: aghi %r15, -32760
|
|
; CHECK: .cfi_def_cfa_offset 32920
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: aghi %r15, 32760
|
|
; CHECK: br %r14
|
|
%y = alloca [4074 x i64], align 8
|
|
%ptr = getelementptr inbounds [4074 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|
|
|
|
; Allocate one more doubleword. This is the one frame size that we can
|
|
; allocate using AGHI but must free using AGFI.
|
|
define void @f3(i64 %x) {
|
|
; CHECK: f3:
|
|
; CHECK: aghi %r15, -32768
|
|
; CHECK: .cfi_def_cfa_offset 32928
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: agfi %r15, 32768
|
|
; CHECK: br %r14
|
|
%y = alloca [4075 x i64], align 8
|
|
%ptr = getelementptr inbounds [4075 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|
|
|
|
; Allocate another doubleword on top of that. The allocation and free
|
|
; must both use AGFI.
|
|
define void @f4(i64 %x) {
|
|
; CHECK: f4:
|
|
; CHECK: agfi %r15, -32776
|
|
; CHECK: .cfi_def_cfa_offset 32936
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: agfi %r15, 32776
|
|
; CHECK: br %r14
|
|
%y = alloca [4076 x i64], align 8
|
|
%ptr = getelementptr inbounds [4076 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|
|
|
|
; The largest size that can be both allocated and freed using AGFI.
|
|
; At this point the frame is too big to represent properly in the CFI.
|
|
define void @f5(i64 %x) {
|
|
; CHECK: f5:
|
|
; CHECK: agfi %r15, -2147483640
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: agfi %r15, 2147483640
|
|
; CHECK: br %r14
|
|
%y = alloca [268435434 x i64], align 8
|
|
%ptr = getelementptr inbounds [268435434 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|
|
|
|
; The only frame size that can be allocated using a single AGFI but which
|
|
; must be freed using two instructions.
|
|
define void @f6(i64 %x) {
|
|
; CHECK: f6:
|
|
; CHECK: agfi %r15, -2147483648
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: agfi %r15, 2147483640
|
|
; CHECK: aghi %r15, 8
|
|
; CHECK: br %r14
|
|
%y = alloca [268435435 x i64], align 8
|
|
%ptr = getelementptr inbounds [268435435 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|
|
|
|
; The smallest frame size that needs two instructions to both allocate
|
|
; and free the frame.
|
|
define void @f7(i64 %x) {
|
|
; CHECK: f7:
|
|
; CHECK: agfi %r15, -2147483648
|
|
; CHECK: aghi %r15, -8
|
|
; CHECK: stg %r2, 168(%r15)
|
|
; CHECK: agfi %r15, 2147483640
|
|
; CHECK: aghi %r15, 16
|
|
; CHECK: br %r14
|
|
%y = alloca [268435436 x i64], align 8
|
|
%ptr = getelementptr inbounds [268435436 x i64]* %y, i64 0, i64 0
|
|
store volatile i64 %x, i64* %ptr
|
|
ret void
|
|
}
|