1 // Check code generation 2 // RUN: %clang_cc1 -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 -verify -triple x86_64-pc-linux-gnu -fopenmp -fopenmp-version=51 -emit-pch -o %t %s 6 // RUN: %clang_cc1 -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: %[[START_ADDR:.+]] = alloca i32, align 4 19 // IR-NEXT: %[[END_ADDR:.+]] = alloca i32, align 4 20 // IR-NEXT: %[[STEP_ADDR:.+]] = alloca i32, align 4 21 // IR-NEXT: %[[I:.+]] = alloca i32, align 4 22 // IR-NEXT: store i32 %[[START:.+]], i32* %[[START_ADDR]], align 4 23 // IR-NEXT: store i32 %[[END:.+]], i32* %[[END_ADDR]], align 4 24 // IR-NEXT: store i32 %[[STEP:.+]], i32* %[[STEP_ADDR]], align 4 25 // IR-NEXT: %[[TMP0:.+]] = load i32, i32* %[[START_ADDR]], align 4 26 // IR-NEXT: store i32 %[[TMP0]], i32* %[[I]], align 4 27 // IR-NEXT: br label %[[FOR_COND:.+]] 28 // IR-EMPTY: 29 // IR-NEXT: [[FOR_COND]]: 30 // IR-NEXT: %[[TMP1:.+]] = load i32, i32* %[[I]], align 4 31 // IR-NEXT: %[[TMP2:.+]] = load i32, i32* %[[END_ADDR]], align 4 32 // IR-NEXT: %[[CMP:.+]] = icmp slt i32 %[[TMP1]], %[[TMP2]] 33 // IR-NEXT: br i1 %[[CMP]], label %[[FOR_BODY:.+]], label %[[FOR_END:.+]] 34 // IR-EMPTY: 35 // IR-NEXT: [[FOR_BODY]]: 36 // IR-NEXT: %[[TMP3:.+]] = load i32, i32* %[[START_ADDR]], align 4 37 // IR-NEXT: %[[TMP4:.+]] = load i32, i32* %[[END_ADDR]], align 4 38 // IR-NEXT: %[[TMP5:.+]] = load i32, i32* %[[STEP_ADDR]], align 4 39 // IR-NEXT: %[[TMP6:.+]] = load i32, i32* %[[I]], align 4 40 // IR-NEXT: call void (...) @body(i32 %[[TMP3]], i32 %[[TMP4]], i32 %[[TMP5]], i32 %[[TMP6]]) 41 // IR-NEXT: br label %[[FOR_INC:.+]] 42 // IR-EMPTY: 43 // IR-NEXT: [[FOR_INC]]: 44 // IR-NEXT: %[[TMP7:.+]] = load i32, i32* %[[STEP_ADDR]], align 4 45 // IR-NEXT: %[[TMP8:.+]] = load i32, i32* %[[I]], align 4 46 // IR-NEXT: %[[ADD:.+]] = add nsw i32 %[[TMP8]], %[[TMP7]] 47 // IR-NEXT: store i32 %[[ADD]], i32* %[[I]], align 4 48 // IR-NEXT: br label %[[FOR_COND]], !llvm.loop ![[LOOP2:[0-9]+]] 49 // IR-EMPTY: 50 // IR-NEXT: [[FOR_END]]: 51 // IR-NEXT: ret void 52 // IR-NEXT: } 53 extern "C" void func(int start, int end, int step) { 54 #pragma omp unroll partial(4) 55 for (int i = start; i < end; i+=step) 56 body(start, end, step, i); 57 } 58 59 #endif /* HEADER */ 60 61 62 // IR: ![[LOOP2]] = distinct !{![[LOOP2]], ![[LOOPPROP3:[0-9]+]], ![[LOOPPROP4:[0-9]+]], ![[LOOPPROP5:[0-9]+]]} 63 // IR: ![[LOOPPROP3]] = !{!"llvm.loop.mustprogress"} 64 // IR: ![[LOOPPROP4]] = !{!"llvm.loop.unroll.count", i32 4} 65 // IR: ![[LOOPPROP5]] = !{!"llvm.loop.unroll.enable"} 66