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; Test the handling of base + 12-bit displacement addresses for large frames,
; in cases where no 20-bit form exists. The tests here assume z10 register
; pressure, without the high words being available.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | \
; RUN: FileCheck -check-prefix=CHECK-NOFP %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -frame-pointer=all | \
; RUN: FileCheck -check-prefix=CHECK-FP %s
; This file tests what happens when a displacement is converted from
; being relative to the start of a frame object to being relative to
; the frame itself. In some cases the test is only possible if two
; objects are allocated.
;
; Rather than rely on a particular order for those objects, the tests
; instead allocate two objects of the same size and apply the test to
; both of them. For consistency, all tests follow this model, even if
; one object would actually be enough.
; First check the highest in-range offset after conversion, which is 4092
; for word-addressing instructions like MVHI.
;
; The last in-range doubleword offset is 4088. Since the frame has two
; emergency spill slots at 160(%r15), the amount that we need to allocate
; in order to put another object at offset 4088 is (4088 - 176) / 4 = 978
; words.
define void @f1() {
; CHECK-NOFP-LABEL: f1:
; CHECK-NOFP: mvhi 4092(%r15), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f1:
; CHECK-FP: mvhi 4092(%r11), 42
; CHECK-FP: br %r14
%region1 = alloca [978 x i32], align 8
%region2 = alloca [978 x i32], align 8
%ptr1 = getelementptr inbounds [978 x i32], ptr %region1, i64 0, i64 1
%ptr2 = getelementptr inbounds [978 x i32], ptr %region2, i64 0, i64 1
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Test the first out-of-range offset. We cannot use an index register here.
define void @f2() {
; CHECK-NOFP-LABEL: f2:
; CHECK-NOFP: lay %r1, 4096(%r15)
; CHECK-NOFP: mvhi 0(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f2:
; CHECK-FP: lay %r1, 4096(%r11)
; CHECK-FP: mvhi 0(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [978 x i32], align 8
%region2 = alloca [978 x i32], align 8
%ptr1 = getelementptr inbounds [978 x i32], ptr %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [978 x i32], ptr %region2, i64 0, i64 2
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Test the next offset after that.
define void @f3() {
; CHECK-NOFP-LABEL: f3:
; CHECK-NOFP: lay %r1, 4096(%r15)
; CHECK-NOFP: mvhi 4(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f3:
; CHECK-FP: lay %r1, 4096(%r11)
; CHECK-FP: mvhi 4(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [978 x i32], align 8
%region2 = alloca [978 x i32], align 8
%ptr1 = getelementptr inbounds [978 x i32], ptr %region1, i64 0, i64 3
%ptr2 = getelementptr inbounds [978 x i32], ptr %region2, i64 0, i64 3
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Add 4096 bytes (1024 words) to the size of each object and repeat.
define void @f4() {
; CHECK-NOFP-LABEL: f4:
; CHECK-NOFP: lay %r1, 4096(%r15)
; CHECK-NOFP: mvhi 4092(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f4:
; CHECK-FP: lay %r1, 4096(%r11)
; CHECK-FP: mvhi 4092(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [2002 x i32], align 8
%region2 = alloca [2002 x i32], align 8
%ptr1 = getelementptr inbounds [2002 x i32], ptr %region1, i64 0, i64 1
%ptr2 = getelementptr inbounds [2002 x i32], ptr %region2, i64 0, i64 1
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; ...as above.
define void @f5() {
; CHECK-NOFP-LABEL: f5:
; CHECK-NOFP: lay %r1, 8192(%r15)
; CHECK-NOFP: mvhi 0(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f5:
; CHECK-FP: lay %r1, 8192(%r11)
; CHECK-FP: mvhi 0(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [2002 x i32], align 8
%region2 = alloca [2002 x i32], align 8
%ptr1 = getelementptr inbounds [2002 x i32], ptr %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [2002 x i32], ptr %region2, i64 0, i64 2
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; ...as above.
define void @f6() {
; CHECK-NOFP-LABEL: f6:
; CHECK-NOFP: lay %r1, 8192(%r15)
; CHECK-NOFP: mvhi 4(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f6:
; CHECK-FP: lay %r1, 8192(%r11)
; CHECK-FP: mvhi 4(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [2002 x i32], align 8
%region2 = alloca [2002 x i32], align 8
%ptr1 = getelementptr inbounds [2002 x i32], ptr %region1, i64 0, i64 3
%ptr2 = getelementptr inbounds [2002 x i32], ptr %region2, i64 0, i64 3
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Now try an offset of 4092 from the start of the object, with the object
; being at offset 8192. This time we need objects of (8192 - 176) / 4 = 2004
; words.
define void @f7() {
; CHECK-NOFP-LABEL: f7:
; CHECK-NOFP: lay %r1, 8192(%r15)
; CHECK-NOFP: mvhi 4092(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f7:
; CHECK-FP: lay %r1, 8192(%r11)
; CHECK-FP: mvhi 4092(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [2004 x i32], align 8
%region2 = alloca [2004 x i32], align 8
%ptr1 = getelementptr inbounds [2004 x i32], ptr %region1, i64 0, i64 1023
%ptr2 = getelementptr inbounds [2004 x i32], ptr %region2, i64 0, i64 1023
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Keep the object-relative offset the same but bump the size of the
; objects by one doubleword.
define void @f8() {
; CHECK-NOFP-LABEL: f8:
; CHECK-NOFP: lay %r1, 12288(%r15)
; CHECK-NOFP: mvhi 4(%r1), 42
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f8:
; CHECK-FP: lay %r1, 12288(%r11)
; CHECK-FP: mvhi 4(%r1), 42
; CHECK-FP: br %r14
%region1 = alloca [2006 x i32], align 8
%region2 = alloca [2006 x i32], align 8
%ptr1 = getelementptr inbounds [2006 x i32], ptr %region1, i64 0, i64 1023
%ptr2 = getelementptr inbounds [2006 x i32], ptr %region2, i64 0, i64 1023
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Check a case where the original displacement is out of range. The backend
; should force STY to be used instead.
define void @f9() {
; CHECK-NOFP-LABEL: f9:
; CHECK-NOFP: lhi [[TMP:%r[0-5]]], 42
; CHECK-NOFP: sty [[TMP]], 12296(%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f9:
; CHECK-FP: lhi [[TMP:%r[0-5]]], 42
; CHECK-FP: sty [[TMP]], 12296(%r11)
; CHECK-FP: br %r14
%region1 = alloca [2006 x i32], align 8
%region2 = alloca [2006 x i32], align 8
%ptr1 = getelementptr inbounds [2006 x i32], ptr %region1, i64 0, i64 1024
%ptr2 = getelementptr inbounds [2006 x i32], ptr %region2, i64 0, i64 1024
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
ret void
}
; Repeat f2 in a case that needs the emergency spill slots (because all
; call-clobbered registers are live and no call-saved ones have been
; allocated).
define void @f10(ptr %vptr) {
; CHECK-NOFP-LABEL: f10:
; CHECK-NOFP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r15)
; CHECK-NOFP: lay [[REGISTER]], 4096(%r15)
; CHECK-NOFP: mvhi 0([[REGISTER]]), 42
; CHECK-NOFP: lg [[REGISTER]], [[OFFSET]](%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f10:
; CHECK-FP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r11)
; CHECK-FP: lay [[REGISTER]], 4096(%r11)
; CHECK-FP: mvhi 0([[REGISTER]]), 42
; CHECK-FP: lg [[REGISTER]], [[OFFSET]](%r11)
; CHECK-FP: br %r14
%i0 = load volatile i32, ptr %vptr
%i1 = load volatile i32, ptr %vptr
%i3 = load volatile i32, ptr %vptr
%i4 = load volatile i32, ptr %vptr
%i5 = load volatile i32, ptr %vptr
%region1 = alloca [978 x i32], align 8
%region2 = alloca [978 x i32], align 8
%ptr1 = getelementptr inbounds [978 x i32], ptr %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [978 x i32], ptr %region2, i64 0, i64 2
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
store volatile i32 %i0, ptr %vptr
store volatile i32 %i1, ptr %vptr
store volatile i32 %i3, ptr %vptr
store volatile i32 %i4, ptr %vptr
store volatile i32 %i5, ptr %vptr
ret void
}
; And again with maximum register pressure. The only spill slots that the
; NOFP case needs are the emergency ones, so the offsets are the same as for f2.
; The FP case needs to spill an extra register and is too dependent on
; register allocation heuristics for a stable test.
define void @f11(ptr %vptr) {
; CHECK-NOFP-LABEL: f11:
; CHECK-NOFP: stmg %r6, %r15,
; CHECK-NOFP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r15)
; CHECK-NOFP: lay [[REGISTER]], 4096(%r15)
; CHECK-NOFP: mvhi 0([[REGISTER]]), 42
; CHECK-NOFP: lg [[REGISTER]], [[OFFSET]](%r15)
; CHECK-NOFP: lmg %r6, %r15,
; CHECK-NOFP: br %r14
%i0 = load volatile i32, ptr %vptr
%i1 = load volatile i32, ptr %vptr
%i3 = load volatile i32, ptr %vptr
%i4 = load volatile i32, ptr %vptr
%i5 = load volatile i32, ptr %vptr
%i6 = load volatile i32, ptr %vptr
%i7 = load volatile i32, ptr %vptr
%i8 = load volatile i32, ptr %vptr
%i9 = load volatile i32, ptr %vptr
%i10 = load volatile i32, ptr %vptr
%i11 = load volatile i32, ptr %vptr
%i12 = load volatile i32, ptr %vptr
%i13 = load volatile i32, ptr %vptr
%i14 = load volatile i32, ptr %vptr
%region1 = alloca [978 x i32], align 8
%region2 = alloca [978 x i32], align 8
%ptr1 = getelementptr inbounds [978 x i32], ptr %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [978 x i32], ptr %region2, i64 0, i64 2
store volatile i32 42, ptr %ptr1
store volatile i32 42, ptr %ptr2
store volatile i32 %i0, ptr %vptr
store volatile i32 %i1, ptr %vptr
store volatile i32 %i3, ptr %vptr
store volatile i32 %i4, ptr %vptr
store volatile i32 %i5, ptr %vptr
store volatile i32 %i6, ptr %vptr
store volatile i32 %i7, ptr %vptr
store volatile i32 %i8, ptr %vptr
store volatile i32 %i9, ptr %vptr
store volatile i32 %i10, ptr %vptr
store volatile i32 %i11, ptr %vptr
store volatile i32 %i12, ptr %vptr
store volatile i32 %i13, ptr %vptr
store volatile i32 %i14, ptr %vptr
ret void
}
|
