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llvm-project/llvm/test/CodeGen/X86/atomic64.ll

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Fix PR15355 - Clear 'mayStore' flag when loading from the atomic variable before the spin loop - Clear kill flag from one use to multiple use in registers forming the address to that atomic variable - don't use a physical register as live-in register in BB (neither entry nor landing pad.) by copying it into virtual register (patch by Cameron Zwarich) llvm-svn: 176538
2013-03-06 08:17:04 +08:00
; RUN: llc < %s -O0 -march=x86-64 -mcpu=corei7 -verify-machineinstrs | FileCheck %s --check-prefix X64
Re-work X86 code generation of atomic ops with spin-loop - Rewrite/merge pseudo-atomic instruction emitters to address the following issue: * Reduce one unnecessary load in spin-loop previously the spin-loop looks like thisMBB: newMBB: ld t1 = [bitinstr.addr] op t2 = t1, [bitinstr.val] not t3 = t2 (if Invert) mov EAX = t1 lcs dest = [bitinstr.addr], t3 [EAX is implicit] bz newMBB fallthrough -->nextMBB the 'ld' at the beginning of newMBB should be lift out of the loop as lcs (or CMPXCHG on x86) will load the current memory value into EAX. This loop is refined as: thisMBB: EAX = LOAD [MI.addr] mainMBB: t1 = OP [MI.val], EAX LCMPXCHG [MI.addr], t1, [EAX is implicitly used & defined] JNE mainMBB sinkMBB: * Remove immopc as, so far, all pseudo-atomic instructions has all-register form only, there is no immedidate operand. * Remove unnecessary attributes/modifiers in pseudo-atomic instruction td * Fix issues in PR13458 - Add comprehensive tests on atomic ops on various data types. NOTE: Some of them are turned off due to missing functionality. - Revise tests due to the new spin-loop generated. llvm-svn: 164281
2012-09-20 11:06:15 +08:00
@sc64 = external global i64
define void @atomic_fetch_add64() nounwind {
; X64: atomic_fetch_add64
entry:
%t1 = atomicrmw add i64* @sc64, i64 1 acquire
; X64: lock
; X64: incq
%t2 = atomicrmw add i64* @sc64, i64 3 acquire
; X64: lock
; X64: addq $3
%t3 = atomicrmw add i64* @sc64, i64 5 acquire
; X64: lock
; X64: xaddq
%t4 = atomicrmw add i64* @sc64, i64 %t3 acquire
; X64: lock
; X64: addq
ret void
; X64: ret
}
define void @atomic_fetch_sub64() nounwind {
; X64: atomic_fetch_sub64
%t1 = atomicrmw sub i64* @sc64, i64 1 acquire
; X64: lock
; X64: decq
%t2 = atomicrmw sub i64* @sc64, i64 3 acquire
; X64: lock
; X64: subq $3
%t3 = atomicrmw sub i64* @sc64, i64 5 acquire
; X64: lock
; X64: xaddq
%t4 = atomicrmw sub i64* @sc64, i64 %t3 acquire
; X64: lock
; X64: subq
ret void
; X64: ret
}
define void @atomic_fetch_and64() nounwind {
; X64: atomic_fetch_and64
%t1 = atomicrmw and i64* @sc64, i64 3 acquire
; X64: lock
; X64: andq $3
%t2 = atomicrmw and i64* @sc64, i64 5 acquire
; X64: andq
; X64: lock
; X64: cmpxchgq
%t3 = atomicrmw and i64* @sc64, i64 %t2 acquire
; X64: lock
; X64: andq
ret void
; X64: ret
}
define void @atomic_fetch_or64() nounwind {
; X64: atomic_fetch_or64
%t1 = atomicrmw or i64* @sc64, i64 3 acquire
; X64: lock
; X64: orq $3
%t2 = atomicrmw or i64* @sc64, i64 5 acquire
; X64: orq
; X64: lock
; X64: cmpxchgq
%t3 = atomicrmw or i64* @sc64, i64 %t2 acquire
; X64: lock
; X64: orq
ret void
; X64: ret
}
define void @atomic_fetch_xor64() nounwind {
; X64: atomic_fetch_xor64
%t1 = atomicrmw xor i64* @sc64, i64 3 acquire
; X64: lock
; X64: xorq $3
%t2 = atomicrmw xor i64* @sc64, i64 5 acquire
; X64: xorq
; X64: lock
; X64: cmpxchgq
%t3 = atomicrmw xor i64* @sc64, i64 %t2 acquire
; X64: lock
; X64: xorq
ret void
; X64: ret
}
define void @atomic_fetch_nand64(i64 %x) nounwind {
; X64: atomic_fetch_nand64
; X32: atomic_fetch_nand64
%t1 = atomicrmw nand i64* @sc64, i64 %x acquire
; X64: andq
; X64: notq
; X64: lock
; X64: cmpxchgq
; X32: andl
; X32: andl
; X32: notl
; X32: notl
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_max64(i64 %x) nounwind {
%t1 = atomicrmw max i64* @sc64, i64 %x acquire
; X64: cmpq
; X64: cmov
; X64: lock
; X64: cmpxchgq
; X32: cmpl
; X32: cmpl
; X32: cmov
; X32: cmov
; X32: cmov
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_min64(i64 %x) nounwind {
%t1 = atomicrmw min i64* @sc64, i64 %x acquire
; X64: cmpq
; X64: cmov
; X64: lock
; X64: cmpxchgq
; X32: cmpl
; X32: cmpl
; X32: cmov
; X32: cmov
; X32: cmov
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_umax64(i64 %x) nounwind {
%t1 = atomicrmw umax i64* @sc64, i64 %x acquire
; X64: cmpq
; X64: cmov
; X64: lock
; X64: cmpxchgq
; X32: cmpl
; X32: cmpl
; X32: cmov
; X32: cmov
; X32: cmov
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_umin64(i64 %x) nounwind {
%t1 = atomicrmw umin i64* @sc64, i64 %x acquire
; X64: cmpq
; X64: cmov
; X64: lock
; X64: cmpxchgq
; X32: cmpl
; X32: cmpl
; X32: cmov
; X32: cmov
; X32: cmov
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_cmpxchg64() nounwind {
%t1 = cmpxchg i64* @sc64, i64 0, i64 1 acquire
; X64: lock
; X64: cmpxchgq
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_store64(i64 %x) nounwind {
store atomic i64 %x, i64* @sc64 release, align 8
; X64-NOT: lock
; X64: movq
; X32: lock
; X32: cmpxchg8b
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_swap64(i64 %x) nounwind {
%t1 = atomicrmw xchg i64* @sc64, i64 %x acquire
; X64-NOT: lock
; X64: xchgq
; X32: lock
; X32: xchg8b
ret void
; X64: ret
; X32: ret
}