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|
; Test 32-bit compare and swap.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check the low end of the CS range.
define i32 @f1(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f1:
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK: br %r14
%pair = cmpxchg ptr %src, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the high end of the aligned CS range.
define i32 @f2(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f2:
; CHECK: cs %r2, %r3, 4092(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 1023
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the next word up, which should use CSY instead of CS.
define i32 @f3(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f3:
; CHECK: csy %r2, %r3, 4096(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 1024
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the high end of the aligned CSY range.
define i32 @f4(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f4:
; CHECK: csy %r2, %r3, 524284(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 131071
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i32 @f5(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f5:
; CHECK: agfi %r4, 524288
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 131072
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the high end of the negative aligned CSY range.
define i32 @f6(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f6:
; CHECK: csy %r2, %r3, -4(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 -1
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the low end of the CSY range.
define i32 @f7(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f7:
; CHECK: csy %r2, %r3, -524288(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 -131072
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check the next word down, which needs separate address logic.
; Other sequences besides this one would be OK.
define i32 @f8(i32 %cmp, i32 %swap, ptr %src) {
; CHECK-LABEL: f8:
; CHECK: agfi %r4, -524292
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 -131073
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check that CS does not allow an index.
define i32 @f9(i32 %cmp, i32 %swap, i64 %src, i64 %index) {
; CHECK-LABEL: f9:
; CHECK: agr %r4, %r5
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK: br %r14
%add1 = add i64 %src, %index
%ptr = inttoptr i64 %add1 to ptr
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check that CSY does not allow an index.
define i32 @f10(i32 %cmp, i32 %swap, i64 %src, i64 %index) {
; CHECK-LABEL: f10:
; CHECK: agr %r4, %r5
; CHECK: csy %r2, %r3, 4096(%r4)
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 4096
%ptr = inttoptr i64 %add2 to ptr
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check that a constant %cmp value is loaded into a register first.
define i32 @f11(i32 %dummy, i32 %swap, ptr %ptr) {
; CHECK-LABEL: f11:
; CHECK: lhi %r2, 1001
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK: br %r14
%pair = cmpxchg ptr %ptr, i32 1001, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check that a constant %swap value is loaded into a register first.
define i32 @f12(i32 %cmp, ptr %ptr) {
; CHECK-LABEL: f12:
; CHECK: lhi [[SWAP:%r[0-9]+]], 1002
; CHECK: cs %r2, [[SWAP]], 0(%r3)
; CHECK: br %r14
%pair = cmpxchg ptr %ptr, i32 %cmp, i32 1002 seq_cst seq_cst
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
; Check generating the comparison result.
; CHECK-LABEL: f13
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK-NEXT: ipm %r2
; CHECK-NEXT: afi %r2, -268435456
; CHECK-NEXT: srl %r2, 31
; CHECK: br %r14
define i32 @f13(i32 %cmp, i32 %swap, ptr %src) {
%pairval = cmpxchg ptr %src, i32 %cmp, i32 %swap seq_cst seq_cst
%val = extractvalue { i32, i1 } %pairval, 1
%res = zext i1 %val to i32
ret i32 %res
}
declare void @g()
; Check using the comparison result for a branch.
; CHECK-LABEL: f14
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK-NEXT: jge g
; CHECK: br %r14
define void @f14(i32 %cmp, i32 %swap, ptr %src) {
%pairval = cmpxchg ptr %src, i32 %cmp, i32 %swap seq_cst seq_cst
%cond = extractvalue { i32, i1 } %pairval, 1
br i1 %cond, label %call, label %exit
call:
tail call void @g()
br label %exit
exit:
ret void
}
; ... and the same with the inverted direction.
; CHECK-LABEL: f15
; CHECK: cs %r2, %r3, 0(%r4)
; CHECK-NEXT: jgl g
; CHECK: br %r14
define void @f15(i32 %cmp, i32 %swap, ptr %src) {
%pairval = cmpxchg ptr %src, i32 %cmp, i32 %swap seq_cst seq_cst
%cond = extractvalue { i32, i1 } %pairval, 1
br i1 %cond, label %exit, label %call
call:
tail call void @g()
br label %exit
exit:
ret void
}
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