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llvm-mirror/test/CodeGen/X86/sse1.ll
Geoff Berry eb996ef33b [MachineCopyPropagation] Extend pass to do COPY source forwarding 
Summary:
This change extends MachineCopyPropagation to do COPY source forwarding
and adds an additional run of the pass to the default pass pipeline just
after register allocation.

This version of this patch uses the newly added
MachineOperand::isRenamable bit to avoid forwarding registers is such a
way as to violate constraints that aren't captured in the
Machine IR (e.g. ABI or ISA constraints).

This change is a continuation of the work started in D30751.

Reviewers: qcolombet, javed.absar, MatzeB, jonpa, tstellar

Subscribers: tpr, mgorny, mcrosier, nhaehnle, nemanjai, jyknight, hfinkel, arsenm, inouehrs, eraman, sdardis, guyblank, fedor.sergeev, aheejin, dschuff, jfb, myatsina, llvm-commits

Differential Revision: https://reviews.llvm.org/D41835

llvm-svn: 323991
2018-02-01 18:54:01 +00:00

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9.6 KiB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; Tests for SSE1 and below, without SSE2+.
; RUN: llc < %s -mtriple=i386-unknown-unknown -mcpu=pentium3 -O3 | FileCheck %s --check-prefix=X32
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse2,+sse -O3 | FileCheck %s --check-prefix=X64
; PR7993
;define <4 x i32> @test3(<4 x i16> %a) nounwind {
; %c = sext <4 x i16> %a to <4 x i32> ; <<4 x i32>> [#uses=1]
; ret <4 x i32> %c
;}
; This should not emit shuffles to populate the top 2 elements of the 4-element
; vector that this ends up returning.
; rdar://8368414
define <2 x float> @test4(<2 x float> %A, <2 x float> %B) nounwind {
; X32-LABEL: test4:
; X32: # %bb.0: # %entry
; X32-NEXT: movaps %xmm0, %xmm2
; X32-NEXT: shufps {{.*#+}} xmm2 = xmm2[1,1],xmm0[2,3]
; X32-NEXT: addss %xmm1, %xmm0
; X32-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,1,2,3]
; X32-NEXT: subss %xmm1, %xmm2
; X32-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
; X32-NEXT: retl
;
; X64-LABEL: test4:
; X64: # %bb.0: # %entry
; X64-NEXT: movaps %xmm0, %xmm2
; X64-NEXT: shufps {{.*#+}} xmm2 = xmm2[1,1],xmm0[2,3]
; X64-NEXT: addss %xmm1, %xmm0
; X64-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,1,2,3]
; X64-NEXT: subss %xmm1, %xmm2
; X64-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
; X64-NEXT: retq
entry:
%tmp7 = extractelement <2 x float> %A, i32 0
%tmp5 = extractelement <2 x float> %A, i32 1
%tmp3 = extractelement <2 x float> %B, i32 0
%tmp1 = extractelement <2 x float> %B, i32 1
%add.r = fadd float %tmp7, %tmp3
%add.i = fsub float %tmp5, %tmp1
%tmp11 = insertelement <2 x float> undef, float %add.r, i32 0
%tmp9 = insertelement <2 x float> %tmp11, float %add.i, i32 1
ret <2 x float> %tmp9
}
; We used to get stuck in type legalization for this example when lowering the
; vselect. With SSE1 v4f32 is a legal type but v4i1 (or any vector integer type)
; is not. We used to ping pong between splitting the vselect for the v4i
; condition operand and widening the resulting vselect for the v4f32 result.
; PR18036
define <4 x float> @vselect(<4 x float>*%p, <4 x i32> %q) {
; X32-LABEL: vselect:
; X32: # %bb.0: # %entry
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: xorps %xmm0, %xmm0
; X32-NEXT: je .LBB1_1
; X32-NEXT: # %bb.2: # %entry
; X32-NEXT: xorps %xmm1, %xmm1
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: jne .LBB1_5
; X32-NEXT: .LBB1_4:
; X32-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: jne .LBB1_8
; X32-NEXT: .LBB1_7:
; X32-NEXT: movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm3[0],xmm2[1],xmm3[1]
; X32-NEXT: je .LBB1_10
; X32-NEXT: jmp .LBB1_11
; X32-NEXT: .LBB1_1:
; X32-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: je .LBB1_4
; X32-NEXT: .LBB1_5: # %entry
; X32-NEXT: xorps %xmm2, %xmm2
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: je .LBB1_7
; X32-NEXT: .LBB1_8: # %entry
; X32-NEXT: xorps %xmm3, %xmm3
; X32-NEXT: cmpl $0, {{[0-9]+}}(%esp)
; X32-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm3[0],xmm2[1],xmm3[1]
; X32-NEXT: jne .LBB1_11
; X32-NEXT: .LBB1_10:
; X32-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X32-NEXT: .LBB1_11: # %entry
; X32-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; X32-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0],xmm2[0]
; X32-NEXT: retl
;
; X64-LABEL: vselect:
; X64: # %bb.0: # %entry
; X64-NEXT: testl %edx, %edx
; X64-NEXT: xorps %xmm0, %xmm0
; X64-NEXT: je .LBB1_1
; X64-NEXT: # %bb.2: # %entry
; X64-NEXT: xorps %xmm1, %xmm1
; X64-NEXT: testl %ecx, %ecx
; X64-NEXT: jne .LBB1_5
; X64-NEXT: .LBB1_4:
; X64-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
; X64-NEXT: testl %r8d, %r8d
; X64-NEXT: jne .LBB1_8
; X64-NEXT: .LBB1_7:
; X64-NEXT: movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
; X64-NEXT: testl %esi, %esi
; X64-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm3[0],xmm2[1],xmm3[1]
; X64-NEXT: je .LBB1_10
; X64-NEXT: jmp .LBB1_11
; X64-NEXT: .LBB1_1:
; X64-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
; X64-NEXT: testl %ecx, %ecx
; X64-NEXT: je .LBB1_4
; X64-NEXT: .LBB1_5: # %entry
; X64-NEXT: xorps %xmm2, %xmm2
; X64-NEXT: testl %r8d, %r8d
; X64-NEXT: je .LBB1_7
; X64-NEXT: .LBB1_8: # %entry
; X64-NEXT: xorps %xmm3, %xmm3
; X64-NEXT: testl %esi, %esi
; X64-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm3[0],xmm2[1],xmm3[1]
; X64-NEXT: jne .LBB1_11
; X64-NEXT: .LBB1_10:
; X64-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X64-NEXT: .LBB1_11: # %entry
; X64-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; X64-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0],xmm2[0]
; X64-NEXT: retq
entry:
%a1 = icmp eq <4 x i32> %q, zeroinitializer
%a14 = select <4 x i1> %a1, <4 x float> <float 1.000000e+00, float 2.000000e+00, float 3.000000e+00, float 4.000000e+0> , <4 x float> zeroinitializer
ret <4 x float> %a14
}
; v4i32 isn't legal for SSE1, but this should be cmpps.
define <4 x float> @PR28044(<4 x float> %a0, <4 x float> %a1) nounwind {
; X32-LABEL: PR28044:
; X32: # %bb.0:
; X32-NEXT: cmpeqps %xmm1, %xmm0
; X32-NEXT: retl
;
; X64-LABEL: PR28044:
; X64: # %bb.0:
; X64-NEXT: cmpeqps %xmm1, %xmm0
; X64-NEXT: retq
%cmp = fcmp oeq <4 x float> %a0, %a1
%sext = sext <4 x i1> %cmp to <4 x i32>
%res = bitcast <4 x i32> %sext to <4 x float>
ret <4 x float> %res
}
; Don't crash trying to do the impossible: an integer vector comparison doesn't exist, so we must scalarize.
; https://llvm.org/bugs/show_bug.cgi?id=30512
define <4 x i32> @PR30512(<4 x i32> %x, <4 x i32> %y) nounwind {
; X32-LABEL: PR30512:
; X32: # %bb.0:
; X32-NEXT: pushl %ebx
; X32-NEXT: pushl %edi
; X32-NEXT: pushl %esi
; X32-NEXT: subl $16, %esp
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
; X32-NEXT: movl {{[0-9]+}}(%esp), %edi
; X32-NEXT: xorl %ebx, %ebx
; X32-NEXT: cmpl {{[0-9]+}}(%esp), %edi
; X32-NEXT: sete %bl
; X32-NEXT: negl %ebx
; X32-NEXT: movl %ebx, {{[0-9]+}}(%esp)
; X32-NEXT: xorl %ebx, %ebx
; X32-NEXT: cmpl {{[0-9]+}}(%esp), %esi
; X32-NEXT: sete %bl
; X32-NEXT: negl %ebx
; X32-NEXT: movl %ebx, {{[0-9]+}}(%esp)
; X32-NEXT: xorl %ebx, %ebx
; X32-NEXT: cmpl {{[0-9]+}}(%esp), %edx
; X32-NEXT: sete %bl
; X32-NEXT: negl %ebx
; X32-NEXT: movl %ebx, {{[0-9]+}}(%esp)
; X32-NEXT: xorl %edx, %edx
; X32-NEXT: cmpl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: sete %dl
; X32-NEXT: negl %edx
; X32-NEXT: movl %edx, (%esp)
; X32-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X32-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
; X32-NEXT: unpcklps {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
; X32-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X32-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
; X32-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm0[0],xmm2[1],xmm0[1]
; X32-NEXT: movlhps {{.*#+}} xmm2 = xmm2[0],xmm1[0]
; X32-NEXT: andps {{\.LCPI.*}}, %xmm2
; X32-NEXT: movaps %xmm2, (%eax)
; X32-NEXT: addl $16, %esp
; X32-NEXT: popl %esi
; X32-NEXT: popl %edi
; X32-NEXT: popl %ebx
; X32-NEXT: retl $4
;
; X64-LABEL: PR30512:
; X64: # %bb.0:
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: cmpl {{[0-9]+}}(%rsp), %r8d
; X64-NEXT: sete %al
; X64-NEXT: negl %eax
; X64-NEXT: movl %eax, -{{[0-9]+}}(%rsp)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: cmpl {{[0-9]+}}(%rsp), %ecx
; X64-NEXT: sete %al
; X64-NEXT: negl %eax
; X64-NEXT: movl %eax, -{{[0-9]+}}(%rsp)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: cmpl {{[0-9]+}}(%rsp), %edx
; X64-NEXT: sete %al
; X64-NEXT: negl %eax
; X64-NEXT: movl %eax, -{{[0-9]+}}(%rsp)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: cmpl %r9d, %esi
; X64-NEXT: sete %al
; X64-NEXT: negl %eax
; X64-NEXT: movl %eax, -{{[0-9]+}}(%rsp)
; X64-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X64-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
; X64-NEXT: unpcklps {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
; X64-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X64-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
; X64-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm0[0],xmm2[1],xmm0[1]
; X64-NEXT: movlhps {{.*#+}} xmm2 = xmm2[0],xmm1[0]
; X64-NEXT: andps {{.*}}(%rip), %xmm2
; X64-NEXT: movaps %xmm2, (%rdi)
; X64-NEXT: movq %rdi, %rax
; X64-NEXT: retq
%cmp = icmp eq <4 x i32> %x, %y
%zext = zext <4 x i1> %cmp to <4 x i32>
ret <4 x i32> %zext
}
; Fragile test warning - we need to induce the generation of a vselect
; post-legalization to cause the crash seen in:
; https://llvm.org/bugs/show_bug.cgi?id=31672
; Is there a way to do that without an unsafe/fast sqrt intrinsic call?
;
; We now no longer try to lower sqrt using rsqrt with SSE1 only as the
; v4i32 vselect mentioned above should never have been created. We ended up
; scalarizing it anyway.
define <2 x float> @PR31672() #0 {
; X32-LABEL: PR31672:
; X32: # %bb.0:
; X32-NEXT: sqrtps {{\.LCPI.*}}, %xmm0
; X32-NEXT: retl
;
; X64-LABEL: PR31672:
; X64: # %bb.0:
; X64-NEXT: sqrtps {{.*}}(%rip), %xmm0
; X64-NEXT: retq
%t0 = call fast <2 x float> @llvm.sqrt.v2f32(<2 x float> <float 42.0, float 3.0>)
ret <2 x float> %t0
}
declare <2 x float> @llvm.sqrt.v2f32(<2 x float>) #1
attributes #0 = { nounwind "unsafe-fp-math"="true" }
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