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[CIR][Transform] Add ternary simplification #809
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // RUN: cir-opt -cir-simplify -o %t.cir %s | ||
| // RUN: FileCheck --input-file=%t.cir %s | ||
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| !s32i = !cir.int<s, 32> | ||
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| 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 | ||
| } | ||
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| // CHECK: cir.func @fold_ternary(%{{.+}}: !s32i, %[[ARG:.+]]: !s32i) -> !s32i { | ||
| // CHECK-NEXT: cir.return %[[ARG]] : !s32i | ||
| // CHECK-NEXT: } | ||
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| 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 | ||
| } | ||
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| // 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: } | ||
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| cir.func @non_simplifiable_ternary(%arg0 : !cir.bool) -> !s32i { | ||
| %0 = cir.alloca !s32i, !cir.ptr<!s32i>, ["a", init] | ||
| %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 | ||
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| cir.yield %3 : !s32i | ||
| }) : (!cir.bool) -> !s32i | ||
| cir.return %1 : !s32i | ||
| } | ||
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| // 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: } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -mmlir --mlir-print-ir-before=cir-simplify %s -o %t1.cir 2>&1 | FileCheck -check-prefix=CIR-BEFORE %s | ||
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -mmlir --mlir-print-ir-after=cir-simplify %s -o %t2.cir 2>&1 | FileCheck -check-prefix=CIR-AFTER %s | ||
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t.ll | ||
| // RUN: FileCheck --input-file=%t.ll --check-prefix=LLVM %s | ||
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| int test(bool x) { | ||
| return x ? 1 : 2; | ||
| } | ||
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| // CIR-BEFORE: cir.func @_Z4testb | ||
| // CIR-BEFORE: %{{.+}} = cir.ternary(%{{.+}}, true { | ||
| // CIR-BEFORE-NEXT: %[[#A:]] = cir.const #cir.int<1> : !s32i | ||
| // CIR-BEFORE-NEXT: cir.yield %[[#A]] : !s32i | ||
| // CIR-BEFORE-NEXT: }, false { | ||
| // CIR-BEFORE-NEXT: %[[#B:]] = cir.const #cir.int<2> : !s32i | ||
| // CIR-BEFORE-NEXT: cir.yield %[[#B]] : !s32i | ||
| // CIR-BEFORE-NEXT: }) : (!cir.bool) -> !s32i | ||
| // CIR-BEFORE: } | ||
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| // CIR-AFTER: cir.func @_Z4testb | ||
| // CIR-AFTER: %[[#A:]] = cir.const #cir.int<1> : !s32i | ||
| // CIR-AFTER-NEXT: %[[#B:]] = cir.const #cir.int<2> : !s32i | ||
| // CIR-AFTER-NEXT: %{{.+}} = cir.select if %{{.+}} then %[[#A]] else %[[#B]] : (!cir.bool, !s32i, !s32i) -> !s32i | ||
| // CIR-AFTER: } | ||
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| // LLVM: define dso_local i32 @_Z4testb | ||
| // LLVM: %{{.+}} = select i1 %{{.+}}, i32 1, i32 2 | ||
| // LLVM: } | ||
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| int test2(bool cond) { | ||
| constexpr int x = 1; | ||
| constexpr int y = 2; | ||
| return cond ? x : y; | ||
| } | ||
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| // CIR-BEFORE: cir.func @_Z5test2b | ||
| // CIR-BEFORE: %[[#COND:]] = cir.load %{{.+}} : !cir.ptr<!cir.bool>, !cir.bool | ||
| // CIR-BEFORE-NEXT: %{{.+}} = cir.ternary(%[[#COND]], true { | ||
| // CIR-BEFORE-NEXT: %[[#A:]] = cir.const #cir.int<1> : !s32i | ||
| // CIR-BEFORE-NEXT: cir.yield %[[#A]] : !s32i | ||
| // CIR-BEFORE-NEXT: }, false { | ||
| // CIR-BEFORE-NEXT: %[[#B:]] = cir.const #cir.int<2> : !s32i | ||
| // CIR-BEFORE-NEXT: cir.yield %[[#B]] : !s32i | ||
| // CIR-BEFORE-NEXT: }) : (!cir.bool) -> !s32i | ||
| // CIR-BEFORE: } | ||
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| // CIR-AFTER: cir.func @_Z5test2b | ||
| // CIR-AFTER: %[[#COND:]] = cir.load %{{.+}} : !cir.ptr<!cir.bool>, !cir.bool | ||
| // CIR-AFTER-NEXT: %[[#A:]] = cir.const #cir.int<1> : !s32i | ||
| // CIR-AFTER-NEXT: %[[#B:]] = cir.const #cir.int<2> : !s32i | ||
| // CIR-AFTER-NEXT: %{{.+}} = cir.select if %[[#COND]] then %[[#A]] else %[[#B]] : (!cir.bool, !s32i, !s32i) -> !s32i | ||
| // CIR-AFTER: } | ||
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| // LLVM: define dso_local i32 @_Z5test2b | ||
| // LLVM: %{{.+}} = select i1 %{{.+}}, i32 1, i32 2 | ||
| // LLVM: } | ||
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