; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3 ; RUN: opt -O2 -S < %s | FileCheck %s ; ; Source code: ; typedef unsigned long u64; ; void foo(char *data, int idx, u64 *); ; int test(int len, char *data) { ; if (len < 100) { ; for (int i = 1; i < len; i++) { ; u64 d[1]; ; d[0] = data[0] ?: '0'; ; foo("%c", i, d); ; } ; } ; return 0; ; } ; Compilation flag: ; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c ; ModuleID = 'test.c' source_filename = "test.c" target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128" target triple = "bpf" @.str = private unnamed_addr constant [3 x i8] c"%c\00", align 1 ; Function Attrs: nounwind define dso_local i32 @test(i32 %len, ptr %data) #0 { ; CHECK-LABEL: define dso_local noundef i32 @test( ; CHECK-SAME: i32 [[LEN:%.*]], ptr nocapture readonly [[DATA:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[D:%.*]] = alloca [1 x i64], align 8 ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LEN]], -2 ; CHECK-NEXT: [[OR_COND:%.*]] = icmp ult i32 [[TMP0]], 98 ; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_BODY:%.*]], label [[IF_END:%.*]] ; CHECK: for.body: ; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 1, [[ENTRY:%.*]] ] ; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr nonnull [[D]]) #[[ATTR3:[0-9]+]] ; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[DATA]], align 1, !tbaa [[TBAA3:![0-9]+]] ; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i8 [[TMP1]], 0 ; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TOBOOL_NOT]], i8 48, i8 [[TMP1]] ; CHECK-NEXT: [[CONV2:%.*]] = sext i8 [[NARROW]] to i64 ; CHECK-NEXT: store i64 [[CONV2]], ptr [[D]], align 8, !tbaa [[TBAA6:![0-9]+]] ; CHECK-NEXT: call void @foo(ptr nonnull @.str, i32 [[I_05]], ptr nonnull [[D]]) #[[ATTR3]] ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[D]]) #[[ATTR3]] ; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1 ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[INC]], [[LEN]] ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[IF_END]], label [[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]] ; CHECK: if.end: ; CHECK-NEXT: ret i32 0 ; entry: %len.addr = alloca i32, align 4 %data.addr = alloca ptr, align 8 %i = alloca i32, align 4 %d = alloca [1 x i64], align 8 store i32 %len, ptr %len.addr, align 4, !tbaa !3 store ptr %data, ptr %data.addr, align 8, !tbaa !7 %0 = load i32, ptr %len.addr, align 4, !tbaa !3 %cmp = icmp slt i32 %0, 100 br i1 %cmp, label %if.then, label %if.end if.then: ; preds = %entry call void @llvm.lifetime.start.p0(i64 4, ptr %i) #3 store i32 1, ptr %i, align 4, !tbaa !3 br label %for.cond for.cond: ; preds = %for.inc, %if.then %1 = load i32, ptr %i, align 4, !tbaa !3 %2 = load i32, ptr %len.addr, align 4, !tbaa !3 %cmp1 = icmp slt i32 %1, %2 br i1 %cmp1, label %for.body, label %for.cond.cleanup for.cond.cleanup: ; preds = %for.cond call void @llvm.lifetime.end.p0(i64 4, ptr %i) #3 br label %for.end for.body: ; preds = %for.cond call void @llvm.lifetime.start.p0(i64 8, ptr %d) #3 %3 = load ptr, ptr %data.addr, align 8, !tbaa !7 %4 = load i8, ptr %3, align 1, !tbaa !9 %conv = sext i8 %4 to i32 %tobool = icmp ne i32 %conv, 0 br i1 %tobool, label %cond.true, label %cond.false cond.true: ; preds = %for.body br label %cond.end cond.false: ; preds = %for.body br label %cond.end cond.end: ; preds = %cond.false, %cond.true %cond = phi i32 [ %conv, %cond.true ], [ 48, %cond.false ] %conv2 = sext i32 %cond to i64 store i64 %conv2, ptr %d, align 8, !tbaa !10 %5 = load i32, ptr %i, align 4, !tbaa !3 call void @foo(ptr @.str, i32 %5, ptr %d) call void @llvm.lifetime.end.p0(i64 8, ptr %d) #3 br label %for.inc for.inc: ; preds = %cond.end %6 = load i32, ptr %i, align 4, !tbaa !3 %inc = add nsw i32 %6, 1 store i32 %inc, ptr %i, align 4, !tbaa !3 br label %for.cond, !llvm.loop !12 for.end: ; preds = %for.cond.cleanup br label %if.end if.end: ; preds = %for.end, %entry ret i32 0 } ; Function Attrs: argmemonly nofree nosync nounwind willreturn declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1 declare dso_local void @foo(ptr, i32, ptr) #2 ; Function Attrs: argmemonly nofree nosync nounwind willreturn declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1 attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } attributes #1 = { argmemonly nofree nosync nounwind willreturn } attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } attributes #3 = { nounwind } !llvm.module.flags = !{!0, !1} !llvm.ident = !{!2} !0 = !{i32 1, !"wchar_size", i32 4} !1 = !{i32 7, !"frame-pointer", i32 2} !2 = !{!"clang version 14.0.0 (https://github.com/llvm/llvm-project.git 8385de118443144518c9fba8b3d831d9076e746b)"} !3 = !{!4, !4, i64 0} !4 = !{!"int", !5, i64 0} !5 = !{!"omnipotent char", !6, i64 0} !6 = !{!"Simple C/C++ TBAA"} !7 = !{!8, !8, i64 0} !8 = !{!"any pointer", !5, i64 0} !9 = !{!5, !5, i64 0} !10 = !{!11, !11, i64 0} !11 = !{!"long", !5, i64 0} !12 = distinct !{!12, !13} !13 = !{!"llvm.loop.mustprogress"}