derek.holloway
7502bf64a4
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64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* RUN: %clang_cc1 -std=c89 -pedantic -verify -emit-llvm -o - %s | FileCheck %s
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RUN: %clang_cc1 -std=c99 -pedantic -verify -emit-llvm -o - %s | FileCheck %s
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RUN: %clang_cc1 -std=c11 -pedantic -verify -emit-llvm -o - %s | FileCheck %s
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RUN: %clang_cc1 -std=c17 -pedantic -verify -emit-llvm -o - %s | FileCheck %s
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RUN: %clang_cc1 -std=c2x -pedantic -verify -emit-llvm -o - %s | FileCheck %s
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*/
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/* expected-no-diagnostics */
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/* WG14 DR268: yes
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* Jumps into iteration statements
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*/
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void foo(void);
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void dr268(void) {
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int i = 5;
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goto goto_target;
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for (i = 0; i < 10; ++i) {
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if (i > 2) ++i;
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goto_target:
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foo();
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}
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/* Ensure that the goto jumps into the middle of the for loop body, and that
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* the initialization and controlling expression are not evaluated on the
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* first pass through.
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*/
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/* Get us to the right function.
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CHECK-LABEL: define{{.*}} void @dr268() {{.*}} {
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First is the initialization and goto.
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CHECK: store i32 5
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CHECK-NEXT: br label %[[GOTO_TARGET:.+]]
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Then comes the initialization of the for loop variable.
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CHECK: store i32 0
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CHECK-NEXT: br label %[[FOR_COND:.+]]
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Then comes the for loop condition check label followed eventually by the
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for loop body label.
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CHECK: [[FOR_COND]]:
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CHECK: {{.+}} = icmp slt i32 {{.+}}, 10
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CHECK: [[FOR_BODY:.+]]:
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CHECK: {{.+}} = icmp sgt i32 {{.+}}, 2
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Then comes the then branch of the if statement.
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CHECK: %[[I:.+]] = load i32,
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CHECK-NEXT: %[[INC:.+]] = add nsw i32 %[[I]], 1
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CHECK-NEXT: store i32 %[[INC]],
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Eventually, we get to the goto label and its call
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CHECK: [[GOTO_TARGET]]:
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CHECK-NEXT: call void @foo()
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CHECK-NEXT: br label %[[FOR_INC:.+]]
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CHECK: [[FOR_INC]]:
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CHECK-NEXT: %[[I2:.+]] = load i32,
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CHECK-NEXT: %[[INC2:.+]] = add nsw i32 %[[I2]], 1
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CHECK-NEXT: store i32 %[[INC2]],
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CHECK-NEXT: br label %[[FOR_COND]]
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*/
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}
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