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365 lines
9.3 KiB
C++
365 lines
9.3 KiB
C++
// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o %t.cir
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// RUN: FileCheck --input-file=%t.cir %s --check-prefix=CIR
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// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t-cir.ll
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// RUN: FileCheck --input-file=%t-cir.ll %s --check-prefix=LLVM
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// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o %t.ll
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// RUN: FileCheck --input-file=%t.ll %s --check-prefix=OGCG
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void pre_case_label() {
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switch (1) {
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LABEL1:;
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z14pre_case_labelv
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "LABEL1"
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield loc(#loc7)
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// LLVM-LABEL: define{{.*}} void @_Z14pre_case_labelv
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[LABEL:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[JUMPS_TO_CASE1:.*]]
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// LLVM: [[JUMPS_TO_CASE1]]:
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// LLVM: br label %[[CASE1]]
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// CIR inserts a bunch of 'empty' blocks all over the place that just jump to
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// the next, so unifying these check blocks/checking more is pretty
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// awful/doesn't result in good checks.
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// LLVM: [[END]]:
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// LLVM: br label
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// OGCG-LABEL: define{{.*}} void @_Z14pre_case_labelv
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// OGCG: switch i32 1, label %[[END:.*]] [
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// OGCG: i32 1, label %[[CASE1:.*]]
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// OGCG: ]
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// OGCG: [[LABEL:.*]]:{{.*}}; No predecessors!
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// OGCG: br label %[[CASE1]]
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// OGCG: [[CASE1]]:
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// OGCG: br label %[[END]]
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// OGCG: [[END]]:
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// OGCG: ret void
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void multiple_pre_case_labels() {
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switch (1) {
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LABEL1:;
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LABEL2:;
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z24multiple_pre_case_labelsv
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "LABEL1"
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// CIR: cir.br ^bb2
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// CIR: ^bb2:
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// CIR: cir.label "LABEL2"
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// LLVM-LABEL: define{{.*}} @_Z24multiple_pre_case_labelsv
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[LABEL1:.*]]:
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// LLVM: br label %[[LABEL2:.*]]
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// LLVM: [[LABEL2]]:
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// LLVM: br label %[[JUMPS_TO_CASE1:.*]]
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// LLVM: [[JUMPS_TO_CASE1]]:
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// LLVM: br label %[[CASE1]]
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// LLVM: [[CASE1]]:
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// LLVM: br label %[[JUMPS_TO_END:.*]]
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// LLVM: [[JUMPS_TO_END]]:
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// LLVM: br label %[[END]]
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// LLVM: [[END]]:
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// LLVM: br label
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// OGCG-LABEL: define{{.*}} @_Z24multiple_pre_case_labelsv
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// OGCG: switch i32 1, label %[[END:.*]] [
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// OGCG: i32 1, label %[[CASE1:.*]]
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// OGCG: ]
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// OGCG: [[LABEL1:.*]]:{{.*}}; No predecessors!
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// OGCG: br label %[[LABEL2:.*]]
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// OGCG: [[LABEL2]]:
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// OGCG: br label %[[CASE1]]
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// OGCG: [[CASE1]]:
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// OGCG: br label %[[END]]
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// OGCG: [[END]]:
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// OGCG: ret void
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// OGCG: }
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void pre_case_goto() {
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switch (1) {
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goto end;
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case 1:;
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end:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z13pre_case_gotov
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.goto "end"
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// CIR: ^bb1:
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "end"
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// Classic-codegen manages to remove the switch, but we don't have that sort of
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// analysis working right. So this variant has a switch still in place.
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// LLVM-LABEL: define{{.*}} @_Z13pre_case_gotov
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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//
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// OGCG-LABEL: define{{.*}} @_Z13pre_case_gotov
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// OGCG: br label %[[END:.*]]
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// OGCG: [[END]]:
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// OGCG: ret void
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void pre_case_if(int cond) {
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switch (1) {
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if (cond) {}
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z11pre_case_ifi
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.scope {
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// CIR: cir.load
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// CIR: cir.cast int_to_bool
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// CIR: cir.if {{.*}} {
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// CIR: }
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// CIR: }
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// Once again, classic-codegen manages to make this a 'noop' and remove it.
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// LLVM-LABEL: define{{.*}} @_Z11pre_case_ifi
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[ENTRY:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[IF_BLOCK:.*]]
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// LLVM: [[IF_BLOCK]]:
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// LLVM: load i32
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// LLVM: icmp ne i32
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// LLVM: br i1 %{{.*}}, label %[[TRUE:.*]], label %[[FALSE:.*]]
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// LLVM: [[TRUE]]:
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// LLVM: br label %[[FALSE]]
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// LLVM: [[FALSE]]:
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// LLVM: br label %[[JUMPS_TO_CASE1:.*]]
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// LLVM: [[JUMPS_TO_CASE1:.*]]:
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// LLVM: br label %[[CASE1]]
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// LLVM: [[CASE1]]:
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// LLVM: [[END]]:
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// OGCG-LABEL: define{{.*}} @_Z11pre_case_ifi
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// OGCG: alloca i32
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// OGCG: store i32 %{{.*}}, ptr %
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// OGCG: ret void
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void pre_case_return() {
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switch (1) {
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return;
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z15pre_case_returnv
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.return
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// CIR: ^bb1:
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// Once again, classic codegen skips this entirely, but CIR doesn't.
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// LLVM-LABEL: define{{.*}} @_Z15pre_case_returnv
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[ENTRY:.*]]:{{.*}}; No predecessors!
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// LLVM: ret void
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// LLVM: [[CASE1]]:
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// LLVM: [[END]]:
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// OGCG-LABEL: define{{.*}} @_Z15pre_case_returnv
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// OGCG: ret void
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void pre_case_break() {
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switch (1) {
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break;
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z14pre_case_breakv
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.break
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// CIR: ^bb1:
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// LLVM-LABEL: define{{.*}} @_Z14pre_case_breakv
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[ENTRY:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[END]]
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// LLVM: [[CASE1]]:
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// LLVM: [[END]]:
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//
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// OGCG-LABEL: define{{.*}} @_Z14pre_case_breakv
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// OGCG: ret void
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void label_only_switch() {
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switch (1) {
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LABEL:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z17label_only_switchv
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "LABEL"
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// CIR: cir.yield
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// CIR: }
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// CIR:}
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// LLVM-LABEL: define{{.*}} @_Z17label_only_switchv
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: ]
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// LLVM: [[LABEL:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[JUMPS_TO_END:.*]]
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// LLVM: [[JUMPS_TO_END]]:
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// LLVM: br label %[[END]]
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// OGCG-LABEL: define{{.*}} @_Z17label_only_switchv
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// OGCG: switch i32 1, label %[[END:.*]] [
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// OGCG: ]
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// OGCG: [[LABEL:.*]]:{{.*}}; No predecessors!
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// OGCG: br label %[[END]]
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// OGCG: [[END]]:
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// OGCG: ret void
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void external_goto_into_pre_case(int cond) {
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if (cond) goto LABEL;
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switch (1) {
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LABEL:;
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case 1:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z27external_goto_into_pre_casei
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// CIR: cir.if {{.*}} {
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// CIR: cir.goto "LABEL"
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "LABEL"
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// CIR: cir.case(equal, [#cir.int<1> : !s32i]) {
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// LLVM-LABEL: define{{.*}} @_Z27external_goto_into_pre_casei
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// LLVM: br i1 %{{.*}}, label %[[TRUE:.*]], label %[[FALSE:.*]]
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// LLVM: [[TRUE]]:
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// LLVM: br label %[[LABEL:.*]]
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// LLVM: [[FALSE]]:
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// Some empty blocks that just do jumps removed here.
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: i32 1, label %[[CASE1:.*]]
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// LLVM: ]
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// LLVM: [[ENTRY:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[LABEL]]
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// LLVM: [[LABEL]]:
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// LLVM: br label %[[CASE1]]
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// LLVM: [[CASE1]]:
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// LLVM: [[END]]:
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// OGCG-LABEL: define{{.*}} @_Z27external_goto_into_pre_casei
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// OGCG: br i1 %{{.*}}, label %[[TRUE:.*]], label %[[FALSE:.*]]
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// OGCG: [[TRUE]]:
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// OGCG: br label %[[LABEL:.*]]
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// OGCG: [[FALSE]]:
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// OGCG: switch i32 1, label %[[END:.*]] [
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// OGCG: i32 1, label %[[CASE1:.*]]
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// OGCG: ]
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// OGCG: [[LABEL]]:
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// OGCG: br label %[[CASE1]]
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// OGCG: [[CASE1]]:
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// OGCG: br label %[[END]]
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// OGCG: [[END]]:
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// OGCG: ret void
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void external_goto_into_pre_case_empty(int cond) {
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if (cond) goto LABEL;
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switch (1) {
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LABEL:;
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}
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}
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// CIR-LABEL: cir.func{{.*}} @_Z33external_goto_into_pre_case_emptyi
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// CIR: cir.if {{.*}} {
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// CIR: cir.goto "LABEL"
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// CIR: cir.switch({{.*}} : !s32i) {
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// CIR: cir.br ^bb1
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// CIR: ^bb1:
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// CIR: cir.label "LABEL"
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// CIR: cir.yield
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// CIR: }
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// LLVM-LABEL: define{{.*}} @_Z33external_goto_into_pre_case_emptyi
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// LLVM: br i1 %{{.*}}, label %[[TRUE:.*]], label %[[FALSE:.*]]
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// LLVM: [[TRUE]]:
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// LLVM: br label %[[LABEL:.*]]
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// LLVM: [[FALSE]]:
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// Some empty blocks that just do jumps removed here.
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// LLVM: switch i32 1, label %[[END:.*]] [
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// LLVM: ]
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// LLVM: [[ENTRY:.*]]:{{.*}}; No predecessors!
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// LLVM: br label %[[LABEL]]
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// LLVM: [[LABEL]]:
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// LLVM: br label %[[END]]
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// LLVM: [[END]]:
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// OGCG-LABEL: define{{.*}} @_Z33external_goto_into_pre_case_emptyi
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// OGCG: br i1 %{{.*}}, label %[[TRUE:.*]], label %[[FALSE:.*]]
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// OGCG: [[TRUE]]:
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// OGCG: br label %[[LABEL:.*]]
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// OGCG: [[FALSE]]:
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// OGCG: switch i32 1, label %[[END:.*]] [
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// OGCG: ]
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// OGCG: [[LABEL]]:
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// OGCG: br label %[[END]]
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// OGCG: [[END]]:
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// OGCG: ret void
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