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llvm-6502/test/CodeGen/X86/atomic32.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) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176538 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-06 00:17:04 +00:00
; RUN: llc < %s -O0 -march=x86-64 -mcpu=corei7 -verify-machineinstrs | FileCheck %s --check-prefix X64
; RUN: llc < %s -O0 -march=x86 -mcpu=corei7 -verify-machineinstrs | FileCheck %s --check-prefix X32
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; RUN: llc < %s -O0 -march=x86 -mcpu=corei7 -mattr=-cmov -verify-machineinstrs | FileCheck %s --check-prefix NOCMOV
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
@sc32 = external global i32
define void @atomic_fetch_add32() nounwind {
; X64: atomic_fetch_add32
; X32: atomic_fetch_add32
entry:
; 32-bit
%t1 = atomicrmw add i32* @sc32, i32 1 acquire
; X64: lock
; X64: incl
; X32: lock
; X32: incl
%t2 = atomicrmw add i32* @sc32, i32 3 acquire
; X64: lock
; X64: addl $3
; X32: lock
; X32: addl $3
%t3 = atomicrmw add i32* @sc32, i32 5 acquire
; X64: lock
; X64: xaddl
; X32: lock
; X32: xaddl
%t4 = atomicrmw add i32* @sc32, i32 %t3 acquire
; X64: lock
; X64: addl
; X32: lock
; X32: addl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_sub32() nounwind {
; X64: atomic_fetch_sub32
; X32: atomic_fetch_sub32
%t1 = atomicrmw sub i32* @sc32, i32 1 acquire
; X64: lock
; X64: decl
; X32: lock
; X32: decl
%t2 = atomicrmw sub i32* @sc32, i32 3 acquire
; X64: lock
; X64: subl $3
; X32: lock
; X32: subl $3
%t3 = atomicrmw sub i32* @sc32, i32 5 acquire
; X64: lock
; X64: xaddl
; X32: lock
; X32: xaddl
%t4 = atomicrmw sub i32* @sc32, i32 %t3 acquire
; X64: lock
; X64: subl
; X32: lock
; X32: subl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_and32() nounwind {
; X64: atomic_fetch_and32
; X32: atomic_fetch_and32
%t1 = atomicrmw and i32* @sc32, i32 3 acquire
; X64: lock
; X64: andl $3
; X32: lock
; X32: andl $3
%t2 = atomicrmw and i32* @sc32, i32 5 acquire
; X64: andl
; X64: lock
; X64: cmpxchgl
; X32: andl
; X32: lock
; X32: cmpxchgl
%t3 = atomicrmw and i32* @sc32, i32 %t2 acquire
; X64: lock
; X64: andl
; X32: lock
; X32: andl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_or32() nounwind {
; X64: atomic_fetch_or32
; X32: atomic_fetch_or32
%t1 = atomicrmw or i32* @sc32, i32 3 acquire
; X64: lock
; X64: orl $3
; X32: lock
; X32: orl $3
%t2 = atomicrmw or i32* @sc32, i32 5 acquire
; X64: orl
; X64: lock
; X64: cmpxchgl
; X32: orl
; X32: lock
; X32: cmpxchgl
%t3 = atomicrmw or i32* @sc32, i32 %t2 acquire
; X64: lock
; X64: orl
; X32: lock
; X32: orl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_xor32() nounwind {
; X64: atomic_fetch_xor32
; X32: atomic_fetch_xor32
%t1 = atomicrmw xor i32* @sc32, i32 3 acquire
; X64: lock
; X64: xorl $3
; X32: lock
; X32: xorl $3
%t2 = atomicrmw xor i32* @sc32, i32 5 acquire
; X64: xorl
; X64: lock
; X64: cmpxchgl
; X32: xorl
; X32: lock
; X32: cmpxchgl
%t3 = atomicrmw xor i32* @sc32, i32 %t2 acquire
; X64: lock
; X64: xorl
; X32: lock
; X32: xorl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_nand32(i32 %x) nounwind {
; X64: atomic_fetch_nand32
; X32: atomic_fetch_nand32
%t1 = atomicrmw nand i32* @sc32, i32 %x acquire
; X64: andl
; X64: notl
; X64: lock
; X64: cmpxchgl
; X32: andl
; X32: notl
; X32: lock
; X32: cmpxchgl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_max32(i32 %x) nounwind {
%t1 = atomicrmw max i32* @sc32, i32 %x acquire
; X64: cmpl
; X64: cmov
; X64: lock
; X64: cmpxchgl
; X32: cmpl
; X32: cmov
; X32: lock
; X32: cmpxchgl
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: cmpl
; NOCMOV: jl
; NOCMOV: lock
; NOCMOV: cmpxchgl
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
ret void
; X64: ret
; X32: ret
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: ret
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
}
define void @atomic_fetch_min32(i32 %x) nounwind {
%t1 = atomicrmw min i32* @sc32, i32 %x acquire
; X64: cmpl
; X64: cmov
; X64: lock
; X64: cmpxchgl
; X32: cmpl
; X32: cmov
; X32: lock
; X32: cmpxchgl
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: cmpl
; NOCMOV: jg
; NOCMOV: lock
; NOCMOV: cmpxchgl
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
ret void
; X64: ret
; X32: ret
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: ret
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
}
define void @atomic_fetch_umax32(i32 %x) nounwind {
%t1 = atomicrmw umax i32* @sc32, i32 %x acquire
; X64: cmpl
; X64: cmov
; X64: lock
; X64: cmpxchgl
; X32: cmpl
; X32: cmov
; X32: lock
; X32: cmpxchgl
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: cmpl
; NOCMOV: jb
; NOCMOV: lock
; NOCMOV: cmpxchgl
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
ret void
; X64: ret
; X32: ret
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: ret
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
}
define void @atomic_fetch_umin32(i32 %x) nounwind {
%t1 = atomicrmw umin i32* @sc32, i32 %x acquire
; X64: cmpl
; X64: cmov
; X64: lock
; X64: cmpxchgl
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
; X32: cmpl
; X32: cmov
; X32: lock
; X32: cmpxchgl
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: cmpl
; NOCMOV: ja
; NOCMOV: lock
; NOCMOV: cmpxchgl
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
ret void
; X64: ret
; X32: ret
Fix two remaining issue after fixing PR15355 when CMOV is not available - Phi nodes should be replaced/updated after lowering CMOV into branch because 'mainMBB' updating operand in Phi node is changed. - Add EFLAGS in livein before lowering the 2nd CMOV. It's necessary as we will reuse the EFLAGS generated before the 1st lowered CMOV, which won't clobber EFLAGS. However, we need explicitly specify that. - '-attr=-cmov' test case are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176598 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 01:01:29 +00:00
; NOCMOV: ret
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164281 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-20 03:06:15 +00:00
}
define void @atomic_fetch_cmpxchg32() nounwind {
%t1 = cmpxchg i32* @sc32, i32 0, i32 1 acquire
; X64: lock
; X64: cmpxchgl
; X32: lock
; X32: cmpxchgl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_store32(i32 %x) nounwind {
store atomic i32 %x, i32* @sc32 release, align 4
; X64-NOT: lock
; X64: movl
; X32-NOT: lock
; X32: movl
ret void
; X64: ret
; X32: ret
}
define void @atomic_fetch_swap32(i32 %x) nounwind {
%t1 = atomicrmw xchg i32* @sc32, i32 %x acquire
; X64-NOT: lock
; X64: xchgl
; X32-NOT: lock
; X32: xchgl
ret void
; X64: ret
; X32: ret
}
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