mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-01-31 20:51:52 +01:00
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
94 lines
2.9 KiB
LLVM
94 lines
2.9 KiB
LLVM
; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx803 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
|
|
|
|
; Where the mask of lanes wanting to exit the loop on this iteration is not
|
|
; obviously already masked by exec (in this case, the xor with -1 inserted by
|
|
; control flow annotation), then lower control flow must insert an S_AND_B64
|
|
; with exec.
|
|
|
|
; GCN-LABEL: {{^}}needs_and:
|
|
; GCN: s_xor_b64 [[REG1:[^ ,]*]], {{[^ ,]*, -1$}}
|
|
; GCN: s_and_b64 [[REG2:[^ ,]*]], exec, [[REG1]]
|
|
; GCN: s_or_b64 [[REG3:[^ ,]*]], [[REG2]],
|
|
; GCN: s_andn2_b64 exec, exec, [[REG3]]
|
|
|
|
define void @needs_and(i32 %arg) {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%tmp23phi = phi i32 [ %tmp23, %endif ], [ 0, %entry ]
|
|
%tmp23 = add nuw i32 %tmp23phi, 1
|
|
%tmp27 = icmp ult i32 %arg, %tmp23
|
|
br i1 %tmp27, label %then, label %endif
|
|
|
|
then: ; preds = %bb
|
|
call void @llvm.amdgcn.buffer.store.f32(float undef, <4 x i32> undef, i32 0, i32 undef, i1 false, i1 false) #1
|
|
br label %endif
|
|
|
|
endif: ; preds = %bb28, %bb
|
|
br i1 %tmp27, label %loop, label %loopexit
|
|
|
|
loopexit:
|
|
ret void
|
|
}
|
|
|
|
; Where the mask of lanes wanting to exit the loop on this iteration is
|
|
; obviously already masked by exec (a V_CMP), then lower control flow can omit
|
|
; the S_AND_B64 to avoid an unnecessary instruction.
|
|
|
|
; GCN-LABEL: {{^}}doesnt_need_and:
|
|
; GCN: v_cmp{{[^ ]*}} [[REG1:[^ ,]*]]
|
|
; GCN: s_or_b64 [[REG2:[^ ,]*]], [[REG1]],
|
|
; GCN: s_andn2_b64 exec, exec, [[REG2]]
|
|
|
|
define void @doesnt_need_and(i32 %arg) {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%tmp23phi = phi i32 [ %tmp23, %loop ], [ 0, %entry ]
|
|
%tmp23 = add nuw i32 %tmp23phi, 1
|
|
%tmp27 = icmp ult i32 %arg, %tmp23
|
|
call void @llvm.amdgcn.buffer.store.f32(float undef, <4 x i32> undef, i32 0, i32 undef, i1 false, i1 false) #1
|
|
br i1 %tmp27, label %loop, label %loopexit
|
|
|
|
loopexit:
|
|
ret void
|
|
}
|
|
|
|
; Another case where the mask of lanes wanting to exit the loop is not masked
|
|
; by exec, because it is a function parameter.
|
|
|
|
; GCN-LABEL: {{^}}break_cond_is_arg:
|
|
; GCN: s_xor_b64 [[REG1:[^ ,]*]], {{[^ ,]*, -1$}}
|
|
; GCN: s_andn2_b64 exec, exec, [[REG3:[^ ,]*]]
|
|
; GCN: s_and_b64 [[REG2:[^ ,]*]], exec, [[REG1]]
|
|
; GCN: s_or_b64 [[REG3]], [[REG2]],
|
|
|
|
define void @break_cond_is_arg(i32 %arg, i1 %breakcond) {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%tmp23phi = phi i32 [ %tmp23, %endif ], [ 0, %entry ]
|
|
%tmp23 = add nuw i32 %tmp23phi, 1
|
|
%tmp27 = icmp ult i32 %arg, %tmp23
|
|
br i1 %tmp27, label %then, label %endif
|
|
|
|
then: ; preds = %bb
|
|
call void @llvm.amdgcn.buffer.store.f32(float undef, <4 x i32> undef, i32 0, i32 undef, i1 false, i1 false) #1
|
|
br label %endif
|
|
|
|
endif: ; preds = %bb28, %bb
|
|
br i1 %breakcond, label %loop, label %loopexit
|
|
|
|
loopexit:
|
|
ret void
|
|
}
|
|
|
|
|
|
declare void @llvm.amdgcn.buffer.store.f32(float, <4 x i32>, i32, i32, i1, i1) #3
|
|
|
|
attributes #3 = { nounwind writeonly }
|
|
|