You've already forked linux-packaging-mono
84 lines
2.1 KiB
LLVM
84 lines
2.1 KiB
LLVM
|
; RUN: llc -mcpu=core-avx2 -mtriple=x86_64 -o - %s | FileCheck %s
|
||
|
|
|
||
|
|
define i1 @try_cmpxchg(i128* %addr, i128 %desired, i128 %new) {
|
||
|
|
; CHECK-LABEL: try_cmpxchg:
|
||
|
|
; CHECK: cmpxchg16b
|
||
|
|
; CHECK-NOT: cmp
|
||
|
|
; CHECK: sete %al
|
||
|
|
; CHECK: retq
|
||
|
|
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
|
||
|
|
%success = extractvalue { i128, i1 } %pair, 1
|
||
|
|
ret i1 %success
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @cmpxchg_flow(i128* %addr, i128 %desired, i128 %new) {
|
||
|
|
; CHECK-LABEL: cmpxchg_flow:
|
||
|
|
; CHECK: cmpxchg16b
|
||
|
|
; CHECK-NOT: cmp
|
||
|
|
; CHECK-NOT: set
|
||
|
|
; CHECK: {{jne|jeq}}
|
||
|
|
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
|
||
|
|
%success = extractvalue { i128, i1 } %pair, 1
|
||
|
|
br i1 %success, label %true, label %false
|
||
|
|
|
||
|
|
true:
|
||
|
|
call void @foo()
|
||
|
|
ret void
|
||
|
|
|
||
|
|
false:
|
||
|
|
call void @bar()
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't use the flags here because cmpxchg16b only sets ZF.
|
||
|
|
define i1 @cmpxchg_arithcmp(i128* %addr, i128 %desired, i128 %new) {
|
||
|
|
; CHECK-LABEL: cmpxchg_arithcmp:
|
||
|
|
; CHECK: cmpxchg16b
|
||
|
|
; CHECK: cmpq
|
||
|
|
; CHECK: retq
|
||
|
|
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
|
||
|
|
%oldval = extractvalue { i128, i1 } %pair, 0
|
||
|
|
%success = icmp sge i128 %oldval, %desired
|
||
|
|
ret i1 %success
|
||
|
|
}
|
||
|
|
|
||
|
|
define i128 @cmpxchg_zext(i128* %addr, i128 %desired, i128 %new) {
|
||
|
|
; CHECK-LABEL: cmpxchg_zext:
|
||
|
|
; CHECK: xorl
|
||
|
|
; CHECK: cmpxchg16b
|
||
|
|
; CHECK-NOT: cmpq
|
||
|
|
; CHECK: sete
|
||
|
|
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
|
||
|
|
%success = extractvalue { i128, i1 } %pair, 1
|
||
|
|
%mask = zext i1 %success to i128
|
||
|
|
ret i128 %mask
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i128 @cmpxchg_use_eflags_and_val(i128* %addr, i128 %offset) {
|
||
|
|
; CHECK-LABEL: cmpxchg_use_eflags_and_val:
|
||
|
|
|
||
|
|
; CHECK: cmpxchg16b
|
||
|
|
; CHECK-NOT: cmpq
|
||
|
|
; CHECK: jne
|
||
|
|
entry:
|
||
|
|
%init = load atomic i128, i128* %addr seq_cst, align 16
|
||
|
|
br label %loop
|
||
|
|
|
||
|
|
loop:
|
||
|
|
%old = phi i128 [%init, %entry], [%oldval, %loop]
|
||
|
|
%new = add i128 %old, %offset
|
||
|
|
|
||
|
|
%pair = cmpxchg i128* %addr, i128 %old, i128 %new seq_cst seq_cst
|
||
|
|
%oldval = extractvalue { i128, i1 } %pair, 0
|
||
|
|
%success = extractvalue { i128, i1 } %pair, 1
|
||
|
|
|
||
|
|
br i1 %success, label %done, label %loop
|
||
|
|
|
||
|
|
done:
|
||
|
|
ret i128 %old
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @foo()
|
||
|
|
declare void @bar()
|