fc62990657
This PR upstreams the GotoSolver pass. It works by walking the function and matching each label to a goto. If a label is not matched to a goto, it is removed and not lowered.
53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
// RUN: cir-opt %s --pass-pipeline='builtin.module(cir-to-llvm,canonicalize{region-simplify=disabled})' -o - | FileCheck %s -check-prefix=MLIR
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!s32i = !cir.int<s, 32>
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module {
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cir.func @gotoFromIf(%arg0: !s32i) -> !s32i {
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%0 = cir.alloca !s32i, !cir.ptr<!s32i>, ["x", init] {alignment = 4 : i64}
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%1 = cir.alloca !s32i, !cir.ptr<!s32i>, ["__retval"] {alignment = 4 : i64}
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cir.store %arg0, %0 : !s32i, !cir.ptr<!s32i>
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cir.scope {
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%6 = cir.load %0 : !cir.ptr<!s32i>, !s32i
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%7 = cir.const #cir.int<5> : !s32i
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%8 = cir.cmp(gt, %6, %7) : !s32i, !cir.bool
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cir.if %8 {
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cir.goto "err"
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}
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}
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%2 = cir.const #cir.int<0> : !s32i
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cir.store %2, %1 : !s32i, !cir.ptr<!s32i>
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cir.br ^bb1
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^bb1:
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%3 = cir.load %1 : !cir.ptr<!s32i>, !s32i
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cir.return %3 : !s32i
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^bb2:
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cir.label "err"
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%4 = cir.const #cir.int<1> : !s32i
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%5 = cir.unary(minus, %4) : !s32i, !s32i
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cir.store %5, %1 : !s32i, !cir.ptr<!s32i>
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cir.br ^bb1
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}
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// MLIR: llvm.func @gotoFromIf
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// MLIR: %[[#One:]] = llvm.mlir.constant(1 : i32) : i32
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// MLIR: %[[#Zero:]] = llvm.mlir.constant(0 : i32) : i32
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// MLIR: llvm.cond_br {{.*}}, ^bb[[#COND_YES:]], ^bb[[#COND_NO:]]
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// MLIR: ^bb[[#COND_YES]]:
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// MLIR: llvm.br ^bb[[#GOTO_BLK:]]
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// MLIR: ^bb[[#COND_NO]]:
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// MLIR: llvm.br ^bb[[#BLK:]]
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// MLIR: ^bb[[#BLK]]:
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// MLIR: llvm.store %[[#Zero]], %[[#Ret_val_addr:]] {{.*}}: i32, !llvm.ptr
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// MLIR: llvm.br ^bb[[#RETURN:]]
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// MLIR: ^bb[[#RETURN]]:
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// MLIR: %[[#Ret_val:]] = llvm.load %[[#Ret_val_addr]] {alignment = 4 : i64} : !llvm.ptr -> i32
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// MLIR: llvm.return %[[#Ret_val]] : i32
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// MLIR: ^bb[[#GOTO_BLK]]:
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// MLIR: %[[#Neg_one:]] = llvm.sub %[[#Zero]], %[[#One]] : i32
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// MLIR: llvm.store %[[#Neg_one]], %[[#Ret_val_addr]] {{.*}}: i32, !llvm.ptr
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// MLIR: llvm.br ^bb[[#RETURN]]
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// MLIR: }
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}
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