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139 lines
4.2 KiB
Plaintext
139 lines
4.2 KiB
Plaintext
// RUN: cir-opt %s -cir-flatten-cfg -o - | FileCheck %s
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!s32i = !cir.int<s, 32>
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module {
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cir.func @foo(%arg0: !s32i) -> !s32i {
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%0 = cir.alloca !s32i, !cir.ptr<!s32i>, ["y", 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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%2 = cir.load %0 : !cir.ptr<!s32i>, !s32i
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%3 = cir.const #cir.int<0> : !s32i
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%4 = cir.cmp gt %2, %3 : !s32i
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%5 = cir.ternary(%4, true {
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%7 = cir.const #cir.int<3> : !s32i
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cir.yield %7 : !s32i
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}, false {
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%7 = cir.const #cir.int<5> : !s32i
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cir.yield %7 : !s32i
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}) : (!cir.bool) -> !s32i
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cir.store %5, %1 : !s32i, !cir.ptr<!s32i>
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%6 = cir.load %1 : !cir.ptr<!s32i>, !s32i
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cir.return %6 : !s32i
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}
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// CHECK: cir.func{{.*}} @foo(%arg0: !s32i) -> !s32i {
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// CHECK: %0 = cir.alloca !s32i, !cir.ptr<!s32i>, ["y", init] {alignment = 4 : i64}
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// CHECK: %1 = cir.alloca !s32i, !cir.ptr<!s32i>, ["__retval"] {alignment = 4 : i64}
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// CHECK: cir.store %arg0, %0 : !s32i, !cir.ptr<!s32i>
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// CHECK: %2 = cir.load %0 : !cir.ptr<!s32i>, !s32i
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// CHECK: %3 = cir.const #cir.int<0> : !s32i
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// CHECK: %4 = cir.cmp gt %2, %3 : !s32i
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// CHECK: cir.brcond %4 ^bb1, ^bb2
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// CHECK: ^bb1: // pred: ^bb0
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// CHECK: %5 = cir.const #cir.int<3> : !s32i
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// CHECK: cir.br ^bb3(%5 : !s32i)
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// CHECK: ^bb2: // pred: ^bb0
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// CHECK: %6 = cir.const #cir.int<5> : !s32i
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// CHECK: cir.br ^bb3(%6 : !s32i)
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// CHECK: ^bb3(%7: !s32i): // 2 preds: ^bb1, ^bb2
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// CHECK: cir.br ^bb4
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// CHECK: ^bb4: // pred: ^bb3
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// CHECK: cir.store %7, %1 : !s32i, !cir.ptr<!s32i>
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// CHECK: %8 = cir.load %1 : !cir.ptr<!s32i>, !s32i
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// CHECK: cir.return %8 : !s32i
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// CHECK: }
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cir.func @foo2(%arg0: !cir.bool) {
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cir.ternary(%arg0, true {
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cir.yield
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}, false {
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cir.yield
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}) : (!cir.bool) -> ()
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cir.return
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}
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// CHECK: cir.func{{.*}} @foo2(%arg0: !cir.bool) {
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// CHECK: cir.brcond %arg0 ^bb1, ^bb2
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// CHECK: ^bb1: // pred: ^bb0
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// CHECK: cir.br ^bb3
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// CHECK: ^bb2: // pred: ^bb0
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// CHECK: cir.br ^bb3
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// CHECK: ^bb3: // 2 preds: ^bb1, ^bb2
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// CHECK: cir.br ^bb4
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// CHECK: ^bb4: // pred: ^bb3
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// CHECK: cir.return
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// CHECK: }
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// Ternary with cir.trap as the false-region terminator. This pattern is
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// emitted by libc++ assertion macros that expand to
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// `cond ? (void)0 : __builtin_trap()`. The flatten-cfg pass must accept
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// cir.trap (a non-returning Terminator) as a valid region terminator and
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// leave it in place rather than rewriting it into a branch.
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cir.func @ternary_trap_false(%arg0: !cir.bool) {
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cir.ternary(%arg0, true {
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cir.yield
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}, false {
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cir.trap
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}) : (!cir.bool) -> ()
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cir.return
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}
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// CHECK: cir.func{{.*}} @ternary_trap_false(%arg0: !cir.bool) {
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// CHECK: cir.brcond %arg0 ^bb1, ^bb2
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// CHECK: ^bb1: // pred: ^bb0
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// CHECK: cir.br ^bb3
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// CHECK: ^bb2: // pred: ^bb0
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// CHECK: cir.trap
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// CHECK: ^bb3: // pred: ^bb1
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// CHECK: cir.br ^bb4
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// CHECK: ^bb4: // pred: ^bb3
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// CHECK: cir.return
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// CHECK: }
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// Mirror case: cir.trap in the true region.
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cir.func @ternary_trap_true(%arg0: !cir.bool) {
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cir.ternary(%arg0, true {
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cir.trap
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}, false {
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cir.yield
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}) : (!cir.bool) -> ()
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cir.return
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}
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// CHECK: cir.func{{.*}} @ternary_trap_true(%arg0: !cir.bool) {
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// CHECK: cir.brcond %arg0 ^bb1, ^bb2
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// CHECK: ^bb1: // pred: ^bb0
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// CHECK: cir.trap
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// CHECK: ^bb2: // pred: ^bb0
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// CHECK: cir.br ^bb3
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// CHECK: ^bb3: // pred: ^bb2
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// CHECK: cir.br ^bb4
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// CHECK: ^bb4: // pred: ^bb3
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// CHECK: cir.return
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// CHECK: }
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// cir.unreachable as the false-region terminator (e.g. throw expressions).
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cir.func @ternary_unreachable_false(%arg0: !cir.bool) {
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cir.ternary(%arg0, true {
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cir.yield
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}, false {
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cir.unreachable
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}) : (!cir.bool) -> ()
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cir.return
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}
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// CHECK: cir.func{{.*}} @ternary_unreachable_false(%arg0: !cir.bool) {
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// CHECK: cir.brcond %arg0 ^bb1, ^bb2
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// CHECK: ^bb1: // pred: ^bb0
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// CHECK: cir.br ^bb3
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// CHECK: ^bb2: // pred: ^bb0
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// CHECK: cir.unreachable
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// CHECK: ^bb3: // pred: ^bb1
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// CHECK: cir.br ^bb4
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// CHECK: ^bb4: // pred: ^bb3
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// CHECK: cir.return
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// CHECK: }
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}
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