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https://github.com/c64scene-ar/llvm-6502.git
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59a5e979b5
This enables very common cases to switch to the smaller encoding. All of the standard LLVM canonicalizations of comparisons are the opposite of what we want. Compares with constants are moved to the RHS, but the first operand can be an inline immediate, literal constant, or SGPR using the 32-bit VOPC encoding. There are additional bad canonicalizations that should also be fixed, such as canonicalizing ge x, k to gt x, (k + 1) if this makes k no longer an inline immediate value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232988 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
958 B
LLVM
31 lines
958 B
LLVM
; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
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; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
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; SI-LABEL: {{^}}br_i1_phi:
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; SI: v_mov_b32_e32 [[REG:v[0-9]+]], 0{{$}}
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; SI: s_and_saveexec_b64
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; SI: s_xor_b64
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; SI: v_mov_b32_e32 [[REG]], -1{{$}}
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; SI: v_cmp_ne_i32_e32 vcc, 0, [[REG]]
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; SI: s_and_saveexec_b64
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; SI: s_xor_b64
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; SI: s_endpgm
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define void @br_i1_phi(i32 %arg, i1 %arg1) #0 {
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bb:
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br i1 %arg1, label %bb2, label %bb3
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bb2: ; preds = %bb
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br label %bb3
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bb3: ; preds = %bb2, %bb
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%tmp = phi i1 [ true, %bb2 ], [ false, %bb ]
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br i1 %tmp, label %bb4, label %bb6
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bb4: ; preds = %bb3
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%tmp5 = mul i32 undef, %arg
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br label %bb6
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bb6: ; preds = %bb4, %bb3
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ret void
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}
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