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1c46c7087d
It caused assertions to fire when building Chromium:
lib/CodeGen/LiveDebugValues.cpp:331: bool
{anonymous}::LiveDebugValues::OpenRangesSet::empty() const: Assertion
`Vars.empty() == VarLocs.empty() && "open ranges are inconsistent"' failed.
See https://crbug.com/992871#c3 for how to reproduce.
> Patch https://reviews.llvm.org/D43256 introduced more aggressive loop layout optimization which depends on profile information. If profile information is not available, the statically estimated profile information(generated by BranchProbabilityInfo.cpp) is used. If user program doesn't behave as BranchProbabilityInfo.cpp expected, the layout may be worse.
>
> To be conservative this patch restores the original layout algorithm in plain mode. But user can still try the aggressive layout optimization with -force-precise-rotation-cost=true.
>
> Differential Revision: https://reviews.llvm.org/D65673
llvm-svn: 368579
84 lines
3.0 KiB
LLVM
84 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse4.2 | FileCheck %s
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; widen a v3f32 to vfi32 to do a vector multiple and an add
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define void @update(<3 x float>* %dst, <3 x float>* %src, i32 %n) nounwind {
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; CHECK-LABEL: update:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushl %ebp
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; CHECK-NEXT: movl %esp, %ebp
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; CHECK-NEXT: andl $-16, %esp
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; CHECK-NEXT: subl $48, %esp
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; CHECK-NEXT: movl $1077936128, {{[0-9]+}}(%esp) # imm = 0x40400000
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; CHECK-NEXT: movl $1073741824, {{[0-9]+}}(%esp) # imm = 0x40000000
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; CHECK-NEXT: movl $1065353216, {{[0-9]+}}(%esp) # imm = 0x3F800000
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; CHECK-NEXT: movl $0, {{[0-9]+}}(%esp)
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; CHECK-NEXT: movaps {{.*#+}} xmm0 = <1.97604004E+3,1.97604004E+3,1.97604004E+3,u>
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_1: # %forcond
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: cmpl 16(%ebp), %eax
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; CHECK-NEXT: jge .LBB0_3
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; CHECK-NEXT: # %bb.2: # %forbody
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl 8(%ebp), %ecx
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; CHECK-NEXT: shll $4, %eax
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; CHECK-NEXT: movl 12(%ebp), %edx
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; CHECK-NEXT: movaps (%edx,%eax), %xmm1
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; CHECK-NEXT: mulps {{[0-9]+}}(%esp), %xmm1
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; CHECK-NEXT: addps %xmm0, %xmm1
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; CHECK-NEXT: extractps $2, %xmm1, 8(%ecx,%eax)
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; CHECK-NEXT: extractps $1, %xmm1, 4(%ecx,%eax)
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; CHECK-NEXT: movss %xmm1, (%ecx,%eax)
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; CHECK-NEXT: incl {{[0-9]+}}(%esp)
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; CHECK-NEXT: jmp .LBB0_1
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; CHECK-NEXT: .LBB0_3: # %afterfor
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; CHECK-NEXT: movl %ebp, %esp
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; CHECK-NEXT: popl %ebp
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; CHECK-NEXT: retl
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entry:
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%dst.addr = alloca <3 x float>*
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%src.addr = alloca <3 x float>*
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%n.addr = alloca i32
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%v = alloca <3 x float>, align 16
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%i = alloca i32, align 4
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store <3 x float>* %dst, <3 x float>** %dst.addr
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store <3 x float>* %src, <3 x float>** %src.addr
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store i32 %n, i32* %n.addr
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store <3 x float> < float 1.000000e+00, float 2.000000e+00, float 3.000000e+00 >, <3 x float>* %v
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store i32 0, i32* %i
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br label %forcond
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forcond:
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%tmp = load i32, i32* %i
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%tmp1 = load i32, i32* %n.addr
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%cmp = icmp slt i32 %tmp, %tmp1
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br i1 %cmp, label %forbody, label %afterfor
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forbody:
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%tmp2 = load i32, i32* %i
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%tmp3 = load <3 x float>*, <3 x float>** %dst.addr
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%arrayidx = getelementptr <3 x float>, <3 x float>* %tmp3, i32 %tmp2
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%tmp4 = load i32, i32* %i
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%tmp5 = load <3 x float>*, <3 x float>** %src.addr
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%arrayidx6 = getelementptr <3 x float>, <3 x float>* %tmp5, i32 %tmp4
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%tmp7 = load <3 x float>, <3 x float>* %arrayidx6
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%tmp8 = load <3 x float>, <3 x float>* %v
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%mul = fmul <3 x float> %tmp7, %tmp8
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%add = fadd <3 x float> %mul, < float 0x409EE02900000000, float 0x409EE02900000000, float 0x409EE02900000000 >
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store <3 x float> %add, <3 x float>* %arrayidx
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br label %forinc
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forinc:
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%tmp9 = load i32, i32* %i
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%inc = add i32 %tmp9, 1
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store i32 %inc, i32* %i
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br label %forcond
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afterfor:
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ret void
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}
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