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TheRock/compiler/amd-llvm/clang/test/CIR/Transforms/ternary-fold.cir
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derek.holloway 7502bf64a4
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// RUN: cir-opt -cir-canonicalize -cir-simplify -o %t.cir %s
// RUN: FileCheck --input-file=%t.cir %s
!s32i = !cir.int<s, 32>
module {
cir.func @fold_ternary(%arg0: !s32i, %arg1: !s32i) -> !s32i {
%0 = cir.const #cir.bool<false> : !cir.bool
%1 = cir.ternary (%0, true {
cir.yield %arg0 : !s32i
}, false {
cir.yield %arg1 : !s32i
}) : (!cir.bool) -> !s32i
cir.return %1 : !s32i
}
// CHECK: cir.func{{.*}} @fold_ternary(%{{.+}}: !s32i, %[[ARG:.+]]: !s32i) -> !s32i {
// CHECK-NEXT: cir.return %[[ARG]] : !s32i
// CHECK-NEXT: }
cir.func @simplify_ternary(%arg0 : !cir.bool, %arg1 : !s32i) -> !s32i {
%0 = cir.ternary (%arg0, true {
%1 = cir.const #cir.int<42> : !s32i
cir.yield %1 : !s32i
}, false {
cir.yield %arg1 : !s32i
}) : (!cir.bool) -> !s32i
cir.return %0 : !s32i
}
// CHECK: cir.func{{.*}} @simplify_ternary(%[[ARG0:.+]]: !cir.bool, %[[ARG1:.+]]: !s32i) -> !s32i {
// CHECK-NEXT: %[[#A:]] = cir.const #cir.int<42> : !s32i
// CHECK-NEXT: %[[#B:]] = cir.select if %[[ARG0]] then %[[#A]] else %[[ARG1]] : (!cir.bool, !s32i, !s32i) -> !s32i
// CHECK-NEXT: cir.return %[[#B]] : !s32i
// CHECK-NEXT: }
cir.func @simplify_ternary_false_const(%arg0 : !cir.bool, %arg1 : !s32i) -> !s32i {
%0 = cir.ternary (%arg0, true {
cir.yield %arg1 : !s32i
}, false {
%1 = cir.const #cir.int<24> : !s32i
cir.yield %1 : !s32i
}) : (!cir.bool) -> !s32i
cir.return %0 : !s32i
}
// CHECK: cir.func{{.*}} @simplify_ternary_false_const(%[[ARG0:.+]]: !cir.bool, %[[ARG1:.+]]: !s32i) -> !s32i {
// CHECK-NEXT: %[[#A:]] = cir.const #cir.int<24> : !s32i
// CHECK-NEXT: %[[#B:]] = cir.select if %[[ARG0]] then %[[ARG1]] else %[[#A]] : (!cir.bool, !s32i, !s32i) -> !s32i
// CHECK-NEXT: cir.return %[[#B]] : !s32i
// CHECK-NEXT: }
cir.func @non_simplifiable_ternary(%arg0 : !cir.bool) -> !s32i {
%0 = cir.alloca !s32i, !cir.ptr<!s32i>, ["a", init] {alignment = 4 : i64}
%1 = cir.ternary (%arg0, true {
%2 = cir.const #cir.int<42> : !s32i
cir.yield %2 : !s32i
}, false {
%3 = cir.load %0 : !cir.ptr<!s32i>, !s32i
cir.yield %3 : !s32i
}) : (!cir.bool) -> !s32i
cir.return %1 : !s32i
}
// CHECK: cir.func{{.*}} @non_simplifiable_ternary(%[[ARG0:.+]]: !cir.bool) -> !s32i {
// CHECK-NEXT: %[[#A:]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["a", init]
// CHECK-NEXT: %[[#B:]] = cir.ternary(%[[ARG0]], true {
// CHECK-NEXT: %[[#C:]] = cir.const #cir.int<42> : !s32i
// CHECK-NEXT: cir.yield %[[#C]] : !s32i
// CHECK-NEXT: }, false {
// CHECK-NEXT: %[[#D:]] = cir.load %[[#A]] : !cir.ptr<!s32i>, !s32i
// CHECK-NEXT: cir.yield %[[#D]] : !s32i
// CHECK-NEXT: }) : (!cir.bool) -> !s32i
// CHECK-NEXT: cir.return %[[#B]] : !s32i
// CHECK-NEXT: }
}