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R600/SI: Fix illegal VGPR->SGPR copy inside of loop

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195026 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2013-11-18 18:50:20 +00:00
parent bf9ddd5e8f
commit 204c953cd5
2 changed files with 32 additions and 2 deletions
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3
lib/Target/R600/SIFixSGPRCopies.cpp
View File

@ -188,8 +188,7 @@ bool SIFixSGPRCopies::isVGPRToSGPRCopy(const MachineInstr &Copy,
return false;
SrcRC = inferRegClassFromDef(TRI, MRI, SrcReg, SrcSubReg);
return TRI->isSGPRClass(DstRC) &&
!TRI->getCommonSubClass(DstRC, SrcRC);
return TRI->isSGPRClass(DstRC) && TRI->hasVGPRs(SrcRC);
}
bool SIFixSGPRCopies::runOnMachineFunction(MachineFunction &MF) {

31
test/CodeGen/R600/sgpr-copy.ll
View File

@ -294,3 +294,34 @@ endif:
store float %6, float addrspace(1)* %out
ret void
}
; This test is just checking that we don't crash / assertion fail.
; CHECK-LABEL: @copy2
; CHECK: S_ENDPGM
define void @copy2([17 x <16 x i8>] addrspace(2)* byval, [32 x <16 x i8>] addrspace(2)* byval, [16 x <32 x i8>] addrspace(2)* byval, float inreg, i32 inreg, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float, float, float, float, float) #0 {
entry:
br label %LOOP68
LOOP68:
%temp4.7 = phi float [ 0.000000e+00, %entry ], [ %v, %ENDIF69 ]
%t = phi i32 [ 20, %entry ], [ %x, %ENDIF69 ]
%g = icmp eq i32 0, %t
%l = bitcast float %temp4.7 to i32
br i1 %g, label %IF70, label %ENDIF69
IF70:
%q = icmp ne i32 %l, 13
%temp.8 = select i1 %q, float 1.000000e+00, float 0.000000e+00
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 0, float %temp.8, float 0.000000e+00, float 0.000000e+00, float 1.000000e+00)
ret void
ENDIF69:
%u = add i32 %l, %t
%v = bitcast i32 %u to float
%x = add i32 %t, -1
br label %LOOP68
}
attributes #0 = { "ShaderType"="0" }