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-rw-r--r--test/CodeGen/X86/atomic8.ll251
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diff --git a/test/CodeGen/X86/atomic8.ll b/test/CodeGen/X86/atomic8.ll
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+++ b/test/CodeGen/X86/atomic8.ll
@@ -0,0 +1,251 @@
+; RUN: llc < %s -O0 -march=x86-64 -mcpu=corei7 | FileCheck %s --check-prefix X64
+; RUN: llc < %s -O0 -march=x86 -mcpu=corei7 | FileCheck %s --check-prefix X32
+; XFAIL: *
+
+@sc8 = external global i8
+
+define void @atomic_fetch_add8() nounwind {
+; X64: atomic_fetch_add8
+; X32: atomic_fetch_add8
+entry:
+; 32-bit
+ %t1 = atomicrmw add i8* @sc8, i8 1 acquire
+; X64: lock
+; X64: incb
+; X32: lock
+; X32: incb
+ %t2 = atomicrmw add i8* @sc8, i8 3 acquire
+; X64: lock
+; X64: addb $3
+; X32: lock
+; X32: addb $3
+ %t3 = atomicrmw add i8* @sc8, i8 5 acquire
+; X64: lock
+; X64: xaddb
+; X32: lock
+; X32: xaddb
+ %t4 = atomicrmw add i8* @sc8, i8 %t3 acquire
+; X64: lock
+; X64: addb
+; X32: lock
+; X32: addb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_sub8() nounwind {
+; X64: atomic_fetch_sub8
+; X32: atomic_fetch_sub8
+ %t1 = atomicrmw sub i8* @sc8, i8 1 acquire
+; X64: lock
+; X64: decb
+; X32: lock
+; X32: decb
+ %t2 = atomicrmw sub i8* @sc8, i8 3 acquire
+; X64: lock
+; X64: subb $3
+; X32: lock
+; X32: subb $3
+ %t3 = atomicrmw sub i8* @sc8, i8 5 acquire
+; X64: lock
+; X64: xaddb
+; X32: lock
+; X32: xaddb
+ %t4 = atomicrmw sub i8* @sc8, i8 %t3 acquire
+; X64: lock
+; X64: subb
+; X32: lock
+; X32: subb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_and8() nounwind {
+; X64: atomic_fetch_and8
+; X32: atomic_fetch_and8
+ %t1 = atomicrmw and i8* @sc8, i8 3 acquire
+; X64: lock
+; X64: andb $3
+; X32: lock
+; X32: andb $3
+ %t2 = atomicrmw and i8* @sc8, i8 5 acquire
+; X64: andb
+; X64: lock
+; X64: cmpxchgb
+; X32: andb
+; X32: lock
+; X32: cmpxchgb
+ %t3 = atomicrmw and i8* @sc8, i8 %t2 acquire
+; X64: lock
+; X64: andb
+; X32: lock
+; X32: andb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_or8() nounwind {
+; X64: atomic_fetch_or8
+; X32: atomic_fetch_or8
+ %t1 = atomicrmw or i8* @sc8, i8 3 acquire
+; X64: lock
+; X64: orb $3
+; X32: lock
+; X32: orb $3
+ %t2 = atomicrmw or i8* @sc8, i8 5 acquire
+; X64: orb
+; X64: lock
+; X64: cmpxchgb
+; X32: orb
+; X32: lock
+; X32: cmpxchgb
+ %t3 = atomicrmw or i8* @sc8, i8 %t2 acquire
+; X64: lock
+; X64: orb
+; X32: lock
+; X32: orb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_xor8() nounwind {
+; X64: atomic_fetch_xor8
+; X32: atomic_fetch_xor8
+ %t1 = atomicrmw xor i8* @sc8, i8 3 acquire
+; X64: lock
+; X64: xorb $3
+; X32: lock
+; X32: xorb $3
+ %t2 = atomicrmw xor i8* @sc8, i8 5 acquire
+; X64: xorb
+; X64: lock
+; X64: cmpxchgb
+; X32: xorb
+; X32: lock
+; X32: cmpxchgb
+ %t3 = atomicrmw xor i8* @sc8, i8 %t2 acquire
+; X64: lock
+; X64: xorb
+; X32: lock
+; X32: xorb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_nand8(i8 %x) nounwind {
+; X64: atomic_fetch_nand8
+; X32: atomic_fetch_nand8
+ %t1 = atomicrmw nand i8* @sc8, i8 %x acquire
+; X64: andb
+; X64: notb
+; X64: lock
+; X64: cmpxchgb
+; X32: andb
+; X32: notb
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_max8(i8 %x) nounwind {
+ %t1 = atomicrmw max i8* @sc8, i8 %x acquire
+; X64: cmpb
+; X64: cmov
+; X64: lock
+; X64: cmpxchgb
+
+; X32: cmpb
+; X32: cmov
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_min8(i8 %x) nounwind {
+ %t1 = atomicrmw min i8* @sc8, i8 %x acquire
+; X64: cmpb
+; X64: cmov
+; X64: lock
+; X64: cmpxchgb
+
+; X32: cmpb
+; X32: cmov
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_umax8(i8 %x) nounwind {
+ %t1 = atomicrmw umax i8* @sc8, i8 %x acquire
+; X64: cmpb
+; X64: cmov
+; X64: lock
+; X64: cmpxchgb
+
+; X32: cmpb
+; X32: cmov
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_umin8(i8 %x) nounwind {
+ %t1 = atomicrmw umin i8* @sc8, i8 %x acquire
+; X64: cmpb
+; X64: cmov
+; X64: lock
+; X64: cmpxchgb
+; X32: cmpb
+; X32: cmov
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_cmpxchg8() nounwind {
+ %t1 = cmpxchg i8* @sc8, i8 0, i8 1 acquire
+; X64: lock
+; X64: cmpxchgb
+; X32: lock
+; X32: cmpxchgb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_store8(i8 %x) nounwind {
+ store atomic i8 %x, i8* @sc8 release, align 4
+; X64-NOT: lock
+; X64: movb
+; X32-NOT: lock
+; X32: movb
+ ret void
+; X64: ret
+; X32: ret
+}
+
+define void @atomic_fetch_swap8(i8 %x) nounwind {
+ %t1 = atomicrmw xchg i8* @sc8, i8 %x acquire
+; X64-NOT: lock
+; X64: xchgb
+; X32-NOT: lock
+; X32: xchgb
+ ret void
+; X64: ret
+; X32: ret
+}