fno-unroll-loops-metadata.cpp
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// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s -O0 -disable-llvm-optzns -fno-unroll-loops | FileCheck --check-prefix=NO_UNROLL_MD %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s -O1 -disable-llvm-optzns -fno-unroll-loops | FileCheck --check-prefix=UNROLL_DISABLED_MD %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s -O2 -disable-llvm-optzns -fno-unroll-loops | FileCheck --check-prefix=UNROLL_DISABLED_MD %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s -O3 -disable-llvm-optzns -fno-unroll-loops | FileCheck --check-prefix=UNROLL_DISABLED_MD %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s -O3 -disable-llvm-optzns | FileCheck --check-prefix=NO_UNROLL_MD %s
// NO_UNROLL_MD-NOT: llvm.loop
// Verify unroll.disable metadata is added to while loop with -fno-unroll-loops
// and optlevel > 0.
void while_test(int *List, int Length) {
// UNROLL_DISABLED_MD: define {{.*}} @_Z10while_test
int i = 0;
while (i < Length) {
// UNROLL_DISABLED_MD: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
List[i] = i * 2;
i++;
}
}
// Verify unroll.disable metadata is added to do-while loop with
// -fno-unroll-loops and optlevel > 0.
void do_test(int *List, int Length) {
// UNROLL_DISABLED_MD: define {{.*}} @_Z7do_test
int i = 0;
do {
// UNROLL_DISABLED_MD: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
List[i] = i * 2;
i++;
} while (i < Length);
}
// Verify unroll.disable metadata is added to while loop with -fno-unroll-loops
// and optlevel > 0.
void for_test(int *List, int Length) {
// UNROLL_DISABLED_MD: define {{.*}} @_Z8for_test
for (int i = 0; i < Length; i++) {
// UNROLL_DISABLED_MD: br label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
List[i] = i * 2;
}
}
// UNROLL_DISABLED_MD: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[UNROLL_DISABLE:.*]]}
// UNROLL_DISABLED_MD: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"}
// UNROLL_DISABLED_MD: ![[LOOP_2]] = distinct !{![[LOOP_2:.*]], ![[UNROLL_DISABLE:.*]]}
// UNROLL_DISABLED_MD: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[UNROLL_DISABLE:.*]]}