1 // Check code generation 2 // RUN: %clang_cc1 -no-opaque-pointers -verify -triple x86_64-pc-linux-gnu -fopenmp -fopenmp-version=51 -emit-llvm %s -o - | FileCheck %s --check-prefix=IR 3 4 // Check same results after serialization round-trip 5 // RUN: %clang_cc1 -no-opaque-pointers -verify -triple x86_64-pc-linux-gnu -fopenmp -fopenmp-version=51 -emit-pch -o %t %s 6 // RUN: %clang_cc1 -no-opaque-pointers -verify -triple x86_64-pc-linux-gnu -fopenmp -fopenmp-version=51 -include-pch %t -emit-llvm %s -o - | FileCheck %s --check-prefix=IR 7 // expected-no-diagnostics 8 9 #ifndef HEADER 10 #define HEADER 11 12 // placeholder for loop body code. 13 extern "C" void body(...) {} 14 15 16 // IR-LABEL: @func( 17 // IR-NEXT: [[ENTRY:.*]]: 18 // IR-NEXT: %[[I:.+]] = alloca i32, align 4 19 // IR-NEXT: store i32 7, i32* %[[I]], align 4 20 // IR-NEXT: br label %[[FOR_COND:.+]] 21 // IR-EMPTY: 22 // IR-NEXT: [[FOR_COND]]: 23 // IR-NEXT: %[[TMP0:.+]] = load i32, i32* %[[I]], align 4 24 // IR-NEXT: %[[CMP:.+]] = icmp slt i32 %[[TMP0]], 17 25 // IR-NEXT: br i1 %[[CMP]], label %[[FOR_BODY:.+]], label %[[FOR_END:.+]] 26 // IR-EMPTY: 27 // IR-NEXT: [[FOR_BODY]]: 28 // IR-NEXT: %[[TMP1:.+]] = load i32, i32* %[[I]], align 4 29 // IR-NEXT: call void (...) @body(i32 noundef %[[TMP1]]) 30 // IR-NEXT: br label %[[FOR_INC:.+]] 31 // IR-EMPTY: 32 // IR-NEXT: [[FOR_INC]]: 33 // IR-NEXT: %[[TMP2:.+]] = load i32, i32* %[[I]], align 4 34 // IR-NEXT: %[[ADD:.+]] = add nsw i32 %[[TMP2]], 3 35 // IR-NEXT: store i32 %[[ADD]], i32* %[[I]], align 4 36 // IR-NEXT: br label %[[FOR_COND]], !llvm.loop ![[LOOP2:[0-9]+]] 37 // IR-EMPTY: 38 // IR-NEXT: [[FOR_END]]: 39 // IR-NEXT: ret void 40 // IR-NEXT: } 41 extern "C" void func() { 42 #pragma omp unroll full 43 for (int i = 7; i < 17; i += 3) 44 body(i); 45 } 46 47 #endif /* HEADER */ 48 49 50 // IR: ![[LOOP2]] = distinct !{![[LOOP2]], ![[LOOPPROP3:[0-9]+]], ![[LOOPPROP4:[0-9]+]]} 51 // IR: ![[LOOPPROP3]] = !{!"llvm.loop.mustprogress"} 52 // IR: ![[LOOPPROP4]] = !{!"llvm.loop.unroll.full"} 53