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.
172 lines
5.5 KiB
172 lines
5.5 KiB
4 months ago
|
; Test 8-bit compare and swap.
|
||
|
|
;
|
||
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-MAIN
|
||
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT
|
||
|
|
|
||
|
|
; Check compare and swap with a variable.
|
||
|
|
; - CHECK is for the main loop.
|
||
|
|
; - CHECK-SHIFT makes sure that the negated shift count used by the second
|
||
|
|
; RLL is set up correctly. The negation is independent of the NILL and L
|
||
|
|
; tested in CHECK. CHECK-SHIFT also checks that %r3 is not modified before
|
||
|
|
; being used in the RISBG (in contrast to things like atomic addition,
|
||
|
|
; which shift %r3 left so that %b is at the high end of the word).
|
||
|
|
define i8 @f1(i8 %dummy, i8 *%src, i8 %cmp, i8 %swap) {
|
||
|
|
; CHECK-MAIN-LABEL: f1:
|
||
|
|
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
|
||
|
|
; CHECK-MAIN-DAG: sll %r3, 3
|
||
|
|
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
|
||
|
|
; CHECK-MAIN: rll %r2, [[OLD]], 8(%r3)
|
||
|
|
; CHECK-MAIN: risbg %r4, %r2, 32, 55, 0
|
||
|
|
; CHECK-MAIN: crjlh %r2, %r4, [[EXIT:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: risbg %r5, %r2, 32, 55, 0
|
||
|
|
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -8({{%r[1-9]+}})
|
||
|
|
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: jl [[LOOP]]
|
||
|
|
; CHECK-MAIN: [[EXIT]]:
|
||
|
|
; CHECK-MAIN-NOT: %r2
|
||
|
|
; CHECK-MAIN: br %r14
|
||
|
|
;
|
||
|
|
; CHECK-SHIFT-LABEL: f1:
|
||
|
|
; CHECK-SHIFT: sll [[SHIFT:%r[1-9]+]], 3
|
||
|
|
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]]
|
||
|
|
; CHECK-SHIFT: rll
|
||
|
|
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -8([[NEGSHIFT]])
|
||
|
|
%pair = cmpxchg i8 *%src, i8 %cmp, i8 %swap seq_cst seq_cst
|
||
|
|
%res = extractvalue { i8, i1 } %pair, 0
|
||
|
|
ret i8 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check compare and swap with constants. We should force the constants into
|
||
|
|
; registers and use the sequence above.
|
||
|
|
define i8 @f2(i8 *%src) {
|
||
|
|
; CHECK-LABEL: f2:
|
||
|
|
; CHECK: lhi [[CMP:%r[0-9]+]], 42
|
||
|
|
; CHECK: risbg [[CMP]], {{%r[0-9]+}}, 32, 55, 0
|
||
|
|
; CHECK: risbg
|
||
|
|
; CHECK: br %r14
|
||
|
|
;
|
||
|
|
; CHECK-SHIFT-LABEL: f2:
|
||
|
|
; CHECK-SHIFT: lhi [[SWAP:%r[0-9]+]], 88
|
||
|
|
; CHECK-SHIFT: risbg
|
||
|
|
; CHECK-SHIFT: risbg [[SWAP]], {{%r[0-9]+}}, 32, 55, 0
|
||
|
|
; CHECK-SHIFT: br %r14
|
||
|
|
%pair = cmpxchg i8 *%src, i8 42, i8 88 seq_cst seq_cst
|
||
|
|
%res = extractvalue { i8, i1 } %pair, 0
|
||
|
|
ret i8 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check generating the comparison result.
|
||
|
|
define i32 @f3(i8 %dummy, i8 *%src, i8 %cmp, i8 %swap) {
|
||
|
|
; CHECK-MAIN-LABEL: f3:
|
||
|
|
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
|
||
|
|
; CHECK-MAIN-DAG: sll %r3, 3
|
||
|
|
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
|
||
|
|
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 8(%r3)
|
||
|
|
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: cr [[TMP]], %r4
|
||
|
|
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: risbg %r5, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -8({{%r[1-9]+}})
|
||
|
|
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: jl [[LOOP]]
|
||
|
|
; CHECK-MAIN: [[EXIT]]:
|
||
|
|
; CHECK-MAIN-NEXT: ipm %r2
|
||
|
|
; CHECK-MAIN-NEXT: afi %r2, -268435456
|
||
|
|
; CHECK-MAIN-NEXT: srl %r2, 31
|
||
|
|
; CHECK-MAIN-NOT: %r2
|
||
|
|
; CHECK-MAIN: br %r14
|
||
|
|
;
|
||
|
|
; CHECK-SHIFT-LABEL: f3:
|
||
|
|
; CHECK-SHIFT: sll [[SHIFT:%r[1-9]+]], 3
|
||
|
|
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]]
|
||
|
|
; CHECK-SHIFT: rll
|
||
|
|
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -8([[NEGSHIFT]])
|
||
|
|
%pair = cmpxchg i8 *%src, i8 %cmp, i8 %swap seq_cst seq_cst
|
||
|
|
%val = extractvalue { i8, i1 } %pair, 1
|
||
|
|
%res = zext i1 %val to i32
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
declare void @g()
|
||
|
|
|
||
|
|
; Check using the comparison result for a branch.
|
||
|
|
; CHECK-LABEL: f4
|
||
|
|
; CHECK-MAIN-LABEL: f4:
|
||
|
|
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
|
||
|
|
; CHECK-MAIN-DAG: sll %r2, 3
|
||
|
|
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
|
||
|
|
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 8(%r2)
|
||
|
|
; CHECK-MAIN: risbg %r3, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: cr [[TMP]], %r3
|
||
|
|
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -8({{%r[1-9]+}})
|
||
|
|
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: jl [[LOOP]]
|
||
|
|
; CHECK-MAIN: [[EXIT]]:
|
||
|
|
; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: jg g
|
||
|
|
; CHECK-MAIN: [[LABEL]]:
|
||
|
|
; CHECK-MAIN: br %r14
|
||
|
|
;
|
||
|
|
; CHECK-SHIFT-LABEL: f4:
|
||
|
|
; CHECK-SHIFT: sll %r2, 3
|
||
|
|
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
|
||
|
|
; CHECK-SHIFT: rll
|
||
|
|
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -8([[NEGSHIFT]])
|
||
|
|
define void @f4(i8 *%src, i8 %cmp, i8 %swap) {
|
||
|
|
%pair = cmpxchg i8 *%src, i8 %cmp, i8 %swap seq_cst seq_cst
|
||
|
|
%cond = extractvalue { i8, i1 } %pair, 1
|
||
|
|
br i1 %cond, label %call, label %exit
|
||
|
|
|
||
|
|
call:
|
||
|
|
tail call void @g()
|
||
|
|
br label %exit
|
||
|
|
|
||
|
|
exit:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; ... and the same with the inverted direction.
|
||
|
|
; CHECK-MAIN-LABEL: f5:
|
||
|
|
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
|
||
|
|
; CHECK-MAIN-DAG: sll %r2, 3
|
||
|
|
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
|
||
|
|
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 8(%r2)
|
||
|
|
; CHECK-MAIN: risbg %r3, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: cr [[TMP]], %r3
|
||
|
|
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 55, 0
|
||
|
|
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -8({{%r[1-9]+}})
|
||
|
|
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
||
|
|
; CHECK-MAIN: jl [[LOOP]]
|
||
|
|
; CHECK-MAIN: [[EXIT]]:
|
||
|
|
; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
|
||
|
|
; CHECK-MAIN: br %r14
|
||
|
|
; CHECK-MAIN: [[LABEL]]:
|
||
|
|
; CHECK-MAIN: jg g
|
||
|
|
;
|
||
|
|
; CHECK-SHIFT-LABEL: f5:
|
||
|
|
; CHECK-SHIFT: sll %r2, 3
|
||
|
|
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
|
||
|
|
; CHECK-SHIFT: rll
|
||
|
|
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -8([[NEGSHIFT]])
|
||
|
|
define void @f5(i8 *%src, i8 %cmp, i8 %swap) {
|
||
|
|
%pair = cmpxchg i8 *%src, i8 %cmp, i8 %swap seq_cst seq_cst
|
||
|
|
%cond = extractvalue { i8, i1 } %pair, 1
|
||
|
|
br i1 %cond, label %exit, label %call
|
||
|
|
|
||
|
|
call:
|
||
|
|
tail call void @g()
|
||
|
|
br label %exit
|
||
|
|
|
||
|
|
exit:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|