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clang-p2996/llvm/test/CodeGen/X86/i128-mul.ll
Jun Bum Lim 2ecb7ba4c6 [CodeGen] Add a new pass for PostRA sink 
Summary:
This pass sinks COPY instructions into a successor block, if the COPY is not
used in the current block and the COPY is live-in to a single successor
(i.e., doesn't require the COPY to be duplicated).  This avoids executing the
the copy on paths where their results aren't needed.  This also exposes
additional opportunites for dead copy elimination and shrink wrapping.

These copies were either not handled by or are inserted after the MachineSink
pass. As an example of the former case, the MachineSink pass cannot sink
COPY instructions with allocatable source registers; for AArch64 these type
of copy instructions are frequently used to move function parameters (PhyReg)
into virtual registers in the entry block..

For the machine IR below, this pass will sink %w19 in the entry into its
successor (%bb.1) because %w19 is only live-in in %bb.1.

```
   %bb.0:
      %wzr = SUBSWri %w1, 1
      %w19 = COPY %w0
      Bcc 11, %bb.2
    %bb.1:
      Live Ins: %w19
      BL @fun
      %w0 = ADDWrr %w0, %w19
      RET %w0
    %bb.2:
      %w0 = COPY %wzr
      RET %w0
```
As we sink %w19 (CSR in AArch64) into %bb.1, the shrink-wrapping pass will be
able to see %bb.0 as a candidate.

With this change I observed 12% more shrink-wrapping candidate and 13% more dead copies deleted  in spec2000/2006/2017 on AArch64.

Reviewers: qcolombet, MatzeB, thegameg, mcrosier, gberry, hfinkel, john.brawn, twoh, RKSimon, sebpop, kparzysz

Reviewed By: sebpop

Subscribers: evandro, sebpop, sfertile, aemerson, mgorny, javed.absar, kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D41463

llvm-svn: 328237
2018-03-22 20:06:47 +00:00

381 lines
14 KiB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefixes=X86,X86-NOBMI
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+bmi2 | FileCheck %s --check-prefixes=X86,X86-BMI
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefixes=X64,X64-NOBMI
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi2 | FileCheck %s --check-prefixes=X64,X64-BMI
; PR1198
define i64 @foo(i64 %x, i64 %y) nounwind {
; X86-NOBMI-LABEL: foo:
; X86-NOBMI: # %bb.0:
; X86-NOBMI-NEXT: pushl %ebp
; X86-NOBMI-NEXT: pushl %ebx
; X86-NOBMI-NEXT: pushl %edi
; X86-NOBMI-NEXT: pushl %esi
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ebp
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edi
; X86-NOBMI-NEXT: movl %ecx, %eax
; X86-NOBMI-NEXT: mull %ebp
; X86-NOBMI-NEXT: movl %edx, %ebx
; X86-NOBMI-NEXT: movl %esi, %eax
; X86-NOBMI-NEXT: mull %ebp
; X86-NOBMI-NEXT: movl %edx, %ebp
; X86-NOBMI-NEXT: movl %eax, %esi
; X86-NOBMI-NEXT: addl %ebx, %esi
; X86-NOBMI-NEXT: adcl $0, %ebp
; X86-NOBMI-NEXT: movl %ecx, %eax
; X86-NOBMI-NEXT: mull %edi
; X86-NOBMI-NEXT: movl %edx, %ebx
; X86-NOBMI-NEXT: addl %esi, %eax
; X86-NOBMI-NEXT: adcl %ebp, %ebx
; X86-NOBMI-NEXT: setb %al
; X86-NOBMI-NEXT: movzbl %al, %ecx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: mull %edi
; X86-NOBMI-NEXT: movl %edx, %esi
; X86-NOBMI-NEXT: movl %eax, %ebp
; X86-NOBMI-NEXT: addl %ebx, %ebp
; X86-NOBMI-NEXT: adcl %ecx, %esi
; X86-NOBMI-NEXT: xorl %ecx, %ecx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: mull %ecx
; X86-NOBMI-NEXT: movl %edx, %edi
; X86-NOBMI-NEXT: movl %eax, %ebx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: mull %ecx
; X86-NOBMI-NEXT: addl %ebx, %eax
; X86-NOBMI-NEXT: adcl %edi, %edx
; X86-NOBMI-NEXT: addl %ebp, %eax
; X86-NOBMI-NEXT: adcl %esi, %edx
; X86-NOBMI-NEXT: popl %esi
; X86-NOBMI-NEXT: popl %edi
; X86-NOBMI-NEXT: popl %ebx
; X86-NOBMI-NEXT: popl %ebp
; X86-NOBMI-NEXT: retl
;
; X86-BMI-LABEL: foo:
; X86-BMI: # %bb.0:
; X86-BMI-NEXT: pushl %ebp
; X86-BMI-NEXT: pushl %ebx
; X86-BMI-NEXT: pushl %edi
; X86-BMI-NEXT: pushl %esi
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %edi
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: mulxl %esi, %edx, %ebx
; X86-BMI-NEXT: movl %eax, %edx
; X86-BMI-NEXT: mulxl %esi, %ebp, %eax
; X86-BMI-NEXT: addl %ebx, %ebp
; X86-BMI-NEXT: adcl $0, %eax
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: mulxl %edi, %edx, %ebx
; X86-BMI-NEXT: addl %ebp, %edx
; X86-BMI-NEXT: adcl %eax, %ebx
; X86-BMI-NEXT: setb %al
; X86-BMI-NEXT: movzbl %al, %eax
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-BMI-NEXT: mulxl %edi, %edi, %ebp
; X86-BMI-NEXT: addl %ebx, %edi
; X86-BMI-NEXT: adcl %eax, %ebp
; X86-BMI-NEXT: xorl %eax, %eax
; X86-BMI-NEXT: movl %esi, %edx
; X86-BMI-NEXT: mulxl %eax, %ebx, %esi
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: mulxl %eax, %eax, %edx
; X86-BMI-NEXT: addl %ebx, %eax
; X86-BMI-NEXT: adcl %esi, %edx
; X86-BMI-NEXT: addl %edi, %eax
; X86-BMI-NEXT: adcl %ebp, %edx
; X86-BMI-NEXT: popl %esi
; X86-BMI-NEXT: popl %edi
; X86-BMI-NEXT: popl %ebx
; X86-BMI-NEXT: popl %ebp
; X86-BMI-NEXT: retl
;
; X64-NOBMI-LABEL: foo:
; X64-NOBMI: # %bb.0:
; X64-NOBMI-NEXT: movq %rdi, %rax
; X64-NOBMI-NEXT: mulq %rsi
; X64-NOBMI-NEXT: movq %rdx, %rax
; X64-NOBMI-NEXT: retq
;
; X64-BMI-LABEL: foo:
; X64-BMI: # %bb.0:
; X64-BMI-NEXT: movq %rdi, %rdx
; X64-BMI-NEXT: mulxq %rsi, %rcx, %rax
; X64-BMI-NEXT: retq
%tmp0 = zext i64 %x to i128
%tmp1 = zext i64 %y to i128
%tmp2 = mul i128 %tmp0, %tmp1
%tmp7 = zext i32 64 to i128
%tmp3 = lshr i128 %tmp2, %tmp7
%tmp4 = trunc i128 %tmp3 to i64
ret i64 %tmp4
}
; <rdar://problem/14096009> superfluous multiply by high part of
; zero-extended value.
define i64 @mul1(i64 %n, i64* nocapture %z, i64* nocapture %x, i64 %y) nounwind {
; X86-NOBMI-LABEL: mul1:
; X86-NOBMI: # %bb.0: # %entry
; X86-NOBMI-NEXT: pushl %ebp
; X86-NOBMI-NEXT: pushl %ebx
; X86-NOBMI-NEXT: pushl %edi
; X86-NOBMI-NEXT: pushl %esi
; X86-NOBMI-NEXT: subl $28, %esp
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: orl %ecx, %eax
; X86-NOBMI-NEXT: je .LBB1_3
; X86-NOBMI-NEXT: # %bb.1: # %for.body.preheader
; X86-NOBMI-NEXT: xorl %eax, %eax
; X86-NOBMI-NEXT: xorl %edx, %edx
; X86-NOBMI-NEXT: xorl %ebx, %ebx
; X86-NOBMI-NEXT: movl $0, {{[0-9]+}}(%esp) # 4-byte Folded Spill
; X86-NOBMI-NEXT: .p2align 4, 0x90
; X86-NOBMI-NEXT: .LBB1_2: # %for.body
; X86-NOBMI-NEXT: # =>This Inner Loop Header: Depth=1
; X86-NOBMI-NEXT: movl %edx, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl %eax, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: movl %eax, %ecx
; X86-NOBMI-NEXT: movl (%eax,%ebx,8), %ebp
; X86-NOBMI-NEXT: movl 4(%eax,%ebx,8), %esi
; X86-NOBMI-NEXT: movl %esi, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl %ebp, %eax
; X86-NOBMI-NEXT: movl %ebp, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NOBMI-NEXT: mull %ecx
; X86-NOBMI-NEXT: movl %edx, %edi
; X86-NOBMI-NEXT: movl %eax, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl %esi, %eax
; X86-NOBMI-NEXT: mull %ecx
; X86-NOBMI-NEXT: movl %edx, %ecx
; X86-NOBMI-NEXT: movl %eax, %esi
; X86-NOBMI-NEXT: addl %edi, %esi
; X86-NOBMI-NEXT: adcl $0, %ecx
; X86-NOBMI-NEXT: movl %ebp, %eax
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NOBMI-NEXT: mull %edx
; X86-NOBMI-NEXT: movl %edx, %ebp
; X86-NOBMI-NEXT: movl %eax, %edi
; X86-NOBMI-NEXT: addl %esi, %edi
; X86-NOBMI-NEXT: adcl %ecx, %ebp
; X86-NOBMI-NEXT: setb {{[0-9]+}}(%esp) # 1-byte Folded Spill
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax # 4-byte Reload
; X86-NOBMI-NEXT: mull {{[0-9]+}}(%esp)
; X86-NOBMI-NEXT: movl %edx, %ecx
; X86-NOBMI-NEXT: movl %eax, %esi
; X86-NOBMI-NEXT: addl %ebp, %esi
; X86-NOBMI-NEXT: movzbl {{[0-9]+}}(%esp), %eax # 1-byte Folded Reload
; X86-NOBMI-NEXT: adcl %eax, %ecx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI-NEXT: xorl %edx, %edx
; X86-NOBMI-NEXT: mull %edx
; X86-NOBMI-NEXT: movl %edx, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: movl %eax, %ebp
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax # 4-byte Reload
; X86-NOBMI-NEXT: xorl %edx, %edx
; X86-NOBMI-NEXT: mull %edx
; X86-NOBMI-NEXT: addl %ebp, %eax
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ebp
; X86-NOBMI-NEXT: adcl {{[0-9]+}}(%esp), %edx # 4-byte Folded Reload
; X86-NOBMI-NEXT: addl %esi, %eax
; X86-NOBMI-NEXT: adcl %ecx, %edx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi # 4-byte Reload
; X86-NOBMI-NEXT: addl {{[0-9]+}}(%esp), %esi # 4-byte Folded Reload
; X86-NOBMI-NEXT: adcl {{[0-9]+}}(%esp), %edi # 4-byte Folded Reload
; X86-NOBMI-NEXT: adcl $0, %eax
; X86-NOBMI-NEXT: adcl $0, %edx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NOBMI-NEXT: movl %esi, (%ecx,%ebx,8)
; X86-NOBMI-NEXT: movl %edi, 4(%ecx,%ebx,8)
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NOBMI-NEXT: movl %ecx, %edi
; X86-NOBMI-NEXT: addl $1, %ebx
; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi # 4-byte Reload
; X86-NOBMI-NEXT: adcl $0, %esi
; X86-NOBMI-NEXT: movl %ebx, %ecx
; X86-NOBMI-NEXT: xorl %ebp, %ecx
; X86-NOBMI-NEXT: movl %esi, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-NOBMI-NEXT: xorl %edi, %esi
; X86-NOBMI-NEXT: orl %ecx, %esi
; X86-NOBMI-NEXT: jne .LBB1_2
; X86-NOBMI-NEXT: .LBB1_3: # %for.end
; X86-NOBMI-NEXT: xorl %eax, %eax
; X86-NOBMI-NEXT: xorl %edx, %edx
; X86-NOBMI-NEXT: addl $28, %esp
; X86-NOBMI-NEXT: popl %esi
; X86-NOBMI-NEXT: popl %edi
; X86-NOBMI-NEXT: popl %ebx
; X86-NOBMI-NEXT: popl %ebp
; X86-NOBMI-NEXT: retl
;
; X86-BMI-LABEL: mul1:
; X86-BMI: # %bb.0: # %entry
; X86-BMI-NEXT: pushl %ebp
; X86-BMI-NEXT: pushl %ebx
; X86-BMI-NEXT: pushl %edi
; X86-BMI-NEXT: pushl %esi
; X86-BMI-NEXT: subl $20, %esp
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: orl %ecx, %eax
; X86-BMI-NEXT: je .LBB1_3
; X86-BMI-NEXT: # %bb.1: # %for.body.preheader
; X86-BMI-NEXT: xorl %ecx, %ecx
; X86-BMI-NEXT: xorl %edx, %edx
; X86-BMI-NEXT: xorl %edi, %edi
; X86-BMI-NEXT: movl $0, {{[0-9]+}}(%esp) # 4-byte Folded Spill
; X86-BMI-NEXT: .p2align 4, 0x90
; X86-BMI-NEXT: .LBB1_2: # %for.body
; X86-BMI-NEXT: # =>This Inner Loop Header: Depth=1
; X86-BMI-NEXT: movl %ecx, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-BMI-NEXT: movl %edx, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: movl (%eax,%edi,8), %ecx
; X86-BMI-NEXT: movl 4(%eax,%edi,8), %ebx
; X86-BMI-NEXT: movl %ebx, (%esp) # 4-byte Spill
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: movl %eax, %esi
; X86-BMI-NEXT: mulxl %eax, %eax, %ebp
; X86-BMI-NEXT: movl %eax, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-BMI-NEXT: movl %ebx, %edx
; X86-BMI-NEXT: mulxl %esi, %eax, %esi
; X86-BMI-NEXT: addl %ebp, %eax
; X86-BMI-NEXT: adcl $0, %esi
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: mulxl {{[0-9]+}}(%esp), %ebp, %ebx
; X86-BMI-NEXT: addl %eax, %ebp
; X86-BMI-NEXT: adcl %esi, %ebx
; X86-BMI-NEXT: movl (%esp), %edx # 4-byte Reload
; X86-BMI-NEXT: mulxl {{[0-9]+}}(%esp), %eax, %esi
; X86-BMI-NEXT: setb %dl
; X86-BMI-NEXT: addl %ebx, %eax
; X86-BMI-NEXT: movzbl %dl, %edx
; X86-BMI-NEXT: adcl %edx, %esi
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-BMI-NEXT: xorl %ebx, %ebx
; X86-BMI-NEXT: mulxl %ebx, %ebx, %edx
; X86-BMI-NEXT: movl %edx, (%esp) # 4-byte Spill
; X86-BMI-NEXT: movl %ecx, %edx
; X86-BMI-NEXT: xorl %ecx, %ecx
; X86-BMI-NEXT: mulxl %ecx, %ecx, %edx
; X86-BMI-NEXT: addl %ebx, %ecx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ebx
; X86-BMI-NEXT: adcl (%esp), %edx # 4-byte Folded Reload
; X86-BMI-NEXT: addl %eax, %ecx
; X86-BMI-NEXT: adcl %esi, %edx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %esi # 4-byte Reload
; X86-BMI-NEXT: addl {{[0-9]+}}(%esp), %esi # 4-byte Folded Reload
; X86-BMI-NEXT: adcl {{[0-9]+}}(%esp), %ebp # 4-byte Folded Reload
; X86-BMI-NEXT: adcl $0, %ecx
; X86-BMI-NEXT: adcl $0, %edx
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: movl %esi, (%eax,%edi,8)
; X86-BMI-NEXT: movl %ebp, 4(%eax,%edi,8)
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI-NEXT: movl %eax, %esi
; X86-BMI-NEXT: addl $1, %edi
; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ebp # 4-byte Reload
; X86-BMI-NEXT: adcl $0, %ebp
; X86-BMI-NEXT: movl %edi, %eax
; X86-BMI-NEXT: xorl %esi, %eax
; X86-BMI-NEXT: movl %ebp, {{[0-9]+}}(%esp) # 4-byte Spill
; X86-BMI-NEXT: movl %ebp, %esi
; X86-BMI-NEXT: xorl %ebx, %esi
; X86-BMI-NEXT: orl %eax, %esi
; X86-BMI-NEXT: jne .LBB1_2
; X86-BMI-NEXT: .LBB1_3: # %for.end
; X86-BMI-NEXT: xorl %eax, %eax
; X86-BMI-NEXT: xorl %edx, %edx
; X86-BMI-NEXT: addl $20, %esp
; X86-BMI-NEXT: popl %esi
; X86-BMI-NEXT: popl %edi
; X86-BMI-NEXT: popl %ebx
; X86-BMI-NEXT: popl %ebp
; X86-BMI-NEXT: retl
;
; X64-NOBMI-LABEL: mul1:
; X64-NOBMI: # %bb.0: # %entry
; X64-NOBMI-NEXT: testq %rdi, %rdi
; X64-NOBMI-NEXT: je .LBB1_3
; X64-NOBMI-NEXT: # %bb.1: # %for.body.preheader
; X64-NOBMI-NEXT: movq %rcx, %r8
; X64-NOBMI-NEXT: movq %rdx, %r9
; X64-NOBMI-NEXT: xorl %r10d, %r10d
; X64-NOBMI-NEXT: xorl %ecx, %ecx
; X64-NOBMI-NEXT: .p2align 4, 0x90
; X64-NOBMI-NEXT: .LBB1_2: # %for.body
; X64-NOBMI-NEXT: # =>This Inner Loop Header: Depth=1
; X64-NOBMI-NEXT: movq %r8, %rax
; X64-NOBMI-NEXT: mulq (%r9,%rcx,8)
; X64-NOBMI-NEXT: addq %r10, %rax
; X64-NOBMI-NEXT: adcq $0, %rdx
; X64-NOBMI-NEXT: movq %rax, (%rsi,%rcx,8)
; X64-NOBMI-NEXT: incq %rcx
; X64-NOBMI-NEXT: cmpq %rcx, %rdi
; X64-NOBMI-NEXT: movq %rdx, %r10
; X64-NOBMI-NEXT: jne .LBB1_2
; X64-NOBMI-NEXT: .LBB1_3: # %for.end
; X64-NOBMI-NEXT: xorl %eax, %eax
; X64-NOBMI-NEXT: retq
;
; X64-BMI-LABEL: mul1:
; X64-BMI: # %bb.0: # %entry
; X64-BMI-NEXT: testq %rdi, %rdi
; X64-BMI-NEXT: je .LBB1_3
; X64-BMI-NEXT: # %bb.1: # %for.body.preheader
; X64-BMI-NEXT: movq %rcx, %r8
; X64-BMI-NEXT: movq %rdx, %r9
; X64-BMI-NEXT: xorl %r10d, %r10d
; X64-BMI-NEXT: xorl %eax, %eax
; X64-BMI-NEXT: .p2align 4, 0x90
; X64-BMI-NEXT: .LBB1_2: # %for.body
; X64-BMI-NEXT: # =>This Inner Loop Header: Depth=1
; X64-BMI-NEXT: movq %r8, %rdx
; X64-BMI-NEXT: mulxq (%r9,%rax,8), %rcx, %rdx
; X64-BMI-NEXT: addq %r10, %rcx
; X64-BMI-NEXT: adcq $0, %rdx
; X64-BMI-NEXT: movq %rcx, (%rsi,%rax,8)
; X64-BMI-NEXT: incq %rax
; X64-BMI-NEXT: cmpq %rax, %rdi
; X64-BMI-NEXT: movq %rdx, %r10
; X64-BMI-NEXT: jne .LBB1_2
; X64-BMI-NEXT: .LBB1_3: # %for.end
; X64-BMI-NEXT: xorl %eax, %eax
; X64-BMI-NEXT: retq
entry:
%conv = zext i64 %y to i128
%cmp11 = icmp eq i64 %n, 0
br i1 %cmp11, label %for.end, label %for.body
for.body: ; preds = %entry, %for.body
%carry.013 = phi i64 [ %conv6, %for.body ], [ 0, %entry ]
%i.012 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i64, i64* %x, i64 %i.012
%0 = load i64, i64* %arrayidx, align 8
%conv2 = zext i64 %0 to i128
%mul = mul i128 %conv2, %conv
%conv3 = zext i64 %carry.013 to i128
%add = add i128 %mul, %conv3
%conv4 = trunc i128 %add to i64
%arrayidx5 = getelementptr inbounds i64, i64* %z, i64 %i.012
store i64 %conv4, i64* %arrayidx5, align 8
%shr = lshr i128 %add, 64
%conv6 = trunc i128 %shr to i64
%inc = add i64 %i.012, 1
%exitcond = icmp eq i64 %inc, %n
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret i64 0
}
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