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TheRock/compiler/amd-llvm/clang/test/CodeGen/extend-variable-liveness.c
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30 lines
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C

// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness -o - | FileCheck %s --implicit-check-not=llvm.fake.use
// Check that fake use calls are emitted at the correct locations, i.e.
// at the end of lexical blocks and at the end of the function.
int glob_i;
char glob_c;
float glob_f;
int foo(int i) {
// CHECK-LABEL: define{{.*}}foo
if (i < 4) {
char j = i * 3;
if (glob_i > 3) {
float f = glob_f;
j = f;
glob_c = j;
// CHECK: call void (...) @llvm.fake.use(float %
// CHECK-NEXT: br label %
}
glob_i = j;
// CHECK: call void (...) @llvm.fake.use(i8 %
// CHECK-NEXT: br label %
}
// CHECK: call void (...) @llvm.fake.use(i32 %
// CHECK-NEXT: ret
return 4;
}
// CHECK: declare void @llvm.fake.use(...)