You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
4.5 KiB
161 lines
4.5 KiB
; Test 64-bit compare and swap.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; Check CSG without a displacement.
|
|
define i64 @f1(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK: br %r14
|
|
%pairval = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check the high end of the aligned CSG range.
|
|
define i64 @f2(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: csg %r2, %r3, 524280(%r4)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64, i64 *%src, i64 65535
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check the next doubleword up, which needs separate address logic.
|
|
; Other sequences besides this one would be OK.
|
|
define i64 @f3(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: agfi %r4, 524288
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64, i64 *%src, i64 65536
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check the high end of the negative aligned CSG range.
|
|
define i64 @f4(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: csg %r2, %r3, -8(%r4)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64, i64 *%src, i64 -1
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check the low end of the CSG range.
|
|
define i64 @f5(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: csg %r2, %r3, -524288(%r4)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64, i64 *%src, i64 -65536
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check the next doubleword down, which needs separate address logic.
|
|
; Other sequences besides this one would be OK.
|
|
define i64 @f6(i64 %cmp, i64 %swap, i64 *%src) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: agfi %r4, -524296
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64, i64 *%src, i64 -65537
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check that CSG does not allow an index.
|
|
define i64 @f7(i64 %cmp, i64 %swap, i64 %src, i64 %index) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: agr %r4, %r5
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK: br %r14
|
|
%add1 = add i64 %src, %index
|
|
%ptr = inttoptr i64 %add1 to i64 *
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check that a constant %cmp value is loaded into a register first.
|
|
define i64 @f8(i64 %dummy, i64 %swap, i64 *%ptr) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: lghi %r2, 1001
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK: br %r14
|
|
%pairval = cmpxchg i64 *%ptr, i64 1001, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check that a constant %swap value is loaded into a register first.
|
|
define i64 @f9(i64 %cmp, i64 *%ptr) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: lghi [[SWAP:%r[0-9]+]], 1002
|
|
; CHECK: csg %r2, [[SWAP]], 0(%r3)
|
|
; CHECK: br %r14
|
|
%pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 1002 seq_cst seq_cst
|
|
%val = extractvalue { i64, i1 } %pairval, 0
|
|
ret i64 %val
|
|
}
|
|
|
|
; Check generating the comparison result.
|
|
; CHECK-LABEL: f10
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK-NEXT: ipm %r2
|
|
; CHECK-NEXT: afi %r2, -268435456
|
|
; CHECK-NEXT: srl %r2, 31
|
|
; CHECK: br %r14
|
|
define i32 @f10(i64 %cmp, i64 %swap, i64 *%src) {
|
|
%pairval = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%val = extractvalue { i64, 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: f11
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK-NEXT: jge g
|
|
; CHECK: br %r14
|
|
define void @f11(i64 %cmp, i64 %swap, i64 *%src) {
|
|
%pairval = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%cond = extractvalue { i64, 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: f12
|
|
; CHECK: csg %r2, %r3, 0(%r4)
|
|
; CHECK-NEXT: jgl g
|
|
; CHECK: br %r14
|
|
define void @f12(i64 %cmp, i64 %swap, i64 *%src) {
|
|
%pairval = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst seq_cst
|
|
%cond = extractvalue { i64, i1 } %pairval, 1
|
|
br i1 %cond, label %exit, label %call
|
|
|
|
call:
|
|
tail call void @g()
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|