735d27dc40
This node reads the rounding control which means it needs to be ordered properly with operations that change the rounding control. So it needs to be chained to maintain order. This patch adds a chain input and output to the node and connects it to the chain in SelectionDAGBuilder. I've update all in-tree targets to connect their chain through their lowering code. Differential Revision: https://reviews.llvm.org/D75132
199 lines
6.5 KiB
LLVM
199 lines
6.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=-sse -verify-machineinstrs < %s | FileCheck %s -check-prefixes=X86,X86-NOSSE
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; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=-sse2 -verify-machineinstrs < %s | FileCheck %s -check-prefixes=X86,X86-SSE
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -verify-machineinstrs < %s | FileCheck %s -check-prefixes=X64
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declare i32 @llvm.flt.rounds()
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define i32 @test_flt_rounds() nounwind {
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; X86-LABEL: test_flt_rounds:
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; X86: # %bb.0:
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; X86-NEXT: subl $2, %esp
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; X86-NEXT: fnstcw (%esp)
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; X86-NEXT: movzwl (%esp), %ecx
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; X86-NEXT: shrl $9, %ecx
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; X86-NEXT: andb $6, %cl
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; X86-NEXT: movl $45, %eax
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; X86-NEXT: # kill: def $cl killed $cl killed $ecx
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; X86-NEXT: shrl %cl, %eax
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; X86-NEXT: andl $3, %eax
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; X86-NEXT: addl $2, %esp
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; X86-NEXT: retl
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;
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; X64-LABEL: test_flt_rounds:
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; X64: # %bb.0:
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; X64-NEXT: fnstcw -{{[0-9]+}}(%rsp)
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; X64-NEXT: movzwl -{{[0-9]+}}(%rsp), %ecx
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; X64-NEXT: shrl $9, %ecx
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; X64-NEXT: andb $6, %cl
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; X64-NEXT: movl $45, %eax
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; X64-NEXT: # kill: def $cl killed $cl killed $ecx
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; X64-NEXT: shrl %cl, %eax
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; X64-NEXT: andl $3, %eax
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; X64-NEXT: retq
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%1 = call i32 @llvm.flt.rounds()
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ret i32 %1
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}
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; Make sure we preserve order with fesetround.
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define i32 @multiple_flt_rounds() nounwind {
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; X86-LABEL: multiple_flt_rounds:
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; X86: # %bb.0: # %entry
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; X86-NEXT: pushl %ebx
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; X86-NEXT: pushl %esi
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; X86-NEXT: subl $20, %esp
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; X86-NEXT: movl $1024, (%esp) # imm = 0x400
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; X86-NEXT: calll fesetround
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; X86-NEXT: fnstcw {{[0-9]+}}(%esp)
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; X86-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: shrl $9, %ecx
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; X86-NEXT: andb $6, %cl
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; X86-NEXT: movl $45, %esi
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; X86-NEXT: movl $45, %eax
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; X86-NEXT: # kill: def $cl killed $cl killed $ecx
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; X86-NEXT: shrl %cl, %eax
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; X86-NEXT: andl $3, %eax
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; X86-NEXT: xorl %ebx, %ebx
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; X86-NEXT: cmpl $3, %eax
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; X86-NEXT: setne %bl
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; X86-NEXT: movl $0, (%esp)
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; X86-NEXT: calll fesetround
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; X86-NEXT: fnstcw {{[0-9]+}}(%esp)
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; X86-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: shrl $9, %ecx
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; X86-NEXT: andb $6, %cl
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; X86-NEXT: movl $45, %eax
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; X86-NEXT: # kill: def $cl killed $cl killed $ecx
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; X86-NEXT: shrl %cl, %eax
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; X86-NEXT: andl $3, %eax
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; X86-NEXT: cmpl $1, %eax
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; X86-NEXT: je .LBB1_2
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; X86-NEXT: # %bb.1: # %entry
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; X86-NEXT: incl %ebx
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; X86-NEXT: .LBB1_2: # %entry
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; X86-NEXT: movl $3072, (%esp) # imm = 0xC00
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; X86-NEXT: calll fesetround
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; X86-NEXT: fnstcw {{[0-9]+}}(%esp)
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; X86-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: shrl $9, %ecx
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; X86-NEXT: andb $6, %cl
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; X86-NEXT: movl $45, %eax
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; X86-NEXT: # kill: def $cl killed $cl killed $ecx
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; X86-NEXT: shrl %cl, %eax
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; X86-NEXT: andl $3, %eax
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; X86-NEXT: cmpl $1, %eax
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; X86-NEXT: sbbl $-1, %ebx
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; X86-NEXT: movl $2048, (%esp) # imm = 0x800
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; X86-NEXT: calll fesetround
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; X86-NEXT: fnstcw {{[0-9]+}}(%esp)
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; X86-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: shrl $9, %ecx
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; X86-NEXT: andb $6, %cl
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; X86-NEXT: # kill: def $cl killed $cl killed $ecx
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; X86-NEXT: shrl %cl, %esi
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; X86-NEXT: andl $3, %esi
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; X86-NEXT: xorl %ecx, %ecx
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; X86-NEXT: cmpl $2, %esi
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; X86-NEXT: setne %cl
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; X86-NEXT: negl %ecx
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; X86-NEXT: xorl %eax, %eax
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; X86-NEXT: cmpl %ecx, %ebx
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; X86-NEXT: setne %al
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; X86-NEXT: addl $20, %esp
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; X86-NEXT: popl %esi
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; X86-NEXT: popl %ebx
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; X86-NEXT: retl
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;
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; X64-LABEL: multiple_flt_rounds:
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; X64: # %bb.0: # %entry
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; X64-NEXT: pushq %rbp
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; X64-NEXT: pushq %r14
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; X64-NEXT: pushq %rbx
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; X64-NEXT: subq $16, %rsp
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; X64-NEXT: movl $1024, %edi # imm = 0x400
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; X64-NEXT: callq fesetround
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; X64-NEXT: fnstcw {{[0-9]+}}(%rsp)
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; X64-NEXT: movzwl {{[0-9]+}}(%rsp), %ecx
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; X64-NEXT: shrl $9, %ecx
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; X64-NEXT: andb $6, %cl
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; X64-NEXT: movl $45, %r14d
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; X64-NEXT: movl $45, %eax
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; X64-NEXT: # kill: def $cl killed $cl killed $ecx
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; X64-NEXT: shrl %cl, %eax
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; X64-NEXT: andl $3, %eax
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; X64-NEXT: xorl %ebx, %ebx
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; X64-NEXT: cmpl $3, %eax
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; X64-NEXT: setne %bl
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; X64-NEXT: xorl %edi, %edi
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; X64-NEXT: callq fesetround
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; X64-NEXT: fnstcw {{[0-9]+}}(%rsp)
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; X64-NEXT: movzwl {{[0-9]+}}(%rsp), %ecx
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; X64-NEXT: shrl $9, %ecx
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; X64-NEXT: andb $6, %cl
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; X64-NEXT: movl $45, %eax
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; X64-NEXT: # kill: def $cl killed $cl killed $ecx
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; X64-NEXT: shrl %cl, %eax
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; X64-NEXT: andl $3, %eax
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; X64-NEXT: leal 1(%rbx), %ebp
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; X64-NEXT: cmpl $1, %eax
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; X64-NEXT: cmovel %ebx, %ebp
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; X64-NEXT: movl $3072, %edi # imm = 0xC00
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; X64-NEXT: callq fesetround
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; X64-NEXT: fnstcw {{[0-9]+}}(%rsp)
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; X64-NEXT: movzwl {{[0-9]+}}(%rsp), %ecx
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; X64-NEXT: shrl $9, %ecx
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; X64-NEXT: andb $6, %cl
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; X64-NEXT: movl $45, %eax
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; X64-NEXT: # kill: def $cl killed $cl killed $ecx
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; X64-NEXT: shrl %cl, %eax
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; X64-NEXT: andl $3, %eax
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; X64-NEXT: cmpl $1, %eax
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; X64-NEXT: sbbl $-1, %ebp
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; X64-NEXT: movl $2048, %edi # imm = 0x800
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; X64-NEXT: callq fesetround
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; X64-NEXT: fnstcw {{[0-9]+}}(%rsp)
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; X64-NEXT: movzwl {{[0-9]+}}(%rsp), %ecx
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; X64-NEXT: shrl $9, %ecx
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; X64-NEXT: andb $6, %cl
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; X64-NEXT: # kill: def $cl killed $cl killed $ecx
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; X64-NEXT: shrl %cl, %r14d
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; X64-NEXT: andl $3, %r14d
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; X64-NEXT: xorl %ecx, %ecx
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; X64-NEXT: cmpl $2, %r14d
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; X64-NEXT: setne %cl
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; X64-NEXT: negl %ecx
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: cmpl %ecx, %ebp
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; X64-NEXT: setne %al
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; X64-NEXT: addq $16, %rsp
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; X64-NEXT: popq %rbx
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; X64-NEXT: popq %r14
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; X64-NEXT: popq %rbp
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; X64-NEXT: retq
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entry:
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%call = tail call i32 @fesetround(i32 1024)
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%0 = tail call i32 @llvm.flt.rounds()
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%cmp = icmp ne i32 %0, 3
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%spec.select = zext i1 %cmp to i32
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%call1 = tail call i32 @fesetround(i32 0)
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%1 = tail call i32 @llvm.flt.rounds()
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%cmp2 = icmp eq i32 %1, 1
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%inc4 = select i1 %cmp, i32 2, i32 1
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%errs.1 = select i1 %cmp2, i32 %spec.select, i32 %inc4
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%call6 = tail call i32 @fesetround(i32 3072)
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%2 = tail call i32 @llvm.flt.rounds()
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%cmp7 = icmp ne i32 %2, 0
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%inc9 = zext i1 %cmp7 to i32
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%spec.select22 = add nuw nsw i32 %errs.1, %inc9
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%call11 = tail call i32 @fesetround(i32 2048)
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%3 = tail call i32 @llvm.flt.rounds()
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%cmp12 = icmp ne i32 %3, 2
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%inc14.neg = sext i1 %cmp12 to i32
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%cmp16 = icmp ne i32 %spec.select22, %inc14.neg
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%cond = zext i1 %cmp16 to i32
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ret i32 %cond
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}
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; Function Attrs: nounwind
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declare dso_local i32 @fesetround(i32) local_unnamed_addr #1
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