; RUN: llc < %s -march=bpf -verify-machineinstrs | FileCheck %s ; Source code: ;struct __sk_buff; ;unsigned long long ;load_byte(void *skb, unsigned long long off) asm("llvm.bpf.load.byte"); ;unsigned long long ;load_half(void *skb, unsigned long long off) asm("llvm.bpf.load.half"); ;typedef unsigned char uint8_t; ;typedef unsigned short uint16_t; ; ;int func_b(struct __sk_buff *skb) ;{ ; uint8_t t = load_byte(skb, 0); ; return t; ;} ; ;int func_h(struct __sk_buff *skb) ;{ ; uint16_t t = load_half(skb, 0); ; return t; ;} ; ;int func_w(struct __sk_buff *skb) ;{ ; uint32_t t = load_word(skb, 0); ; return t; ;} %struct.__sk_buff = type opaque ; Function Attrs: nounwind readonly define i32 @func_b(%struct.__sk_buff* %skb) local_unnamed_addr #0 { entry: %0 = bitcast %struct.__sk_buff* %skb to i8* %call = tail call i64 @llvm.bpf.load.byte(i8* %0, i64 0) %conv = trunc i64 %call to i32 %conv1 = and i32 %conv, 255 ; CHECK-NOT: r0 &= 255 ret i32 %conv1 } ; Function Attrs: nounwind readonly declare i64 @llvm.bpf.load.byte(i8*, i64) #1 ; Function Attrs: nounwind readonly define i32 @func_h(%struct.__sk_buff* %skb) local_unnamed_addr #0 { entry: %0 = bitcast %struct.__sk_buff* %skb to i8* %call = tail call i64 @llvm.bpf.load.half(i8* %0, i64 0) %conv = trunc i64 %call to i32 %conv1 = and i32 %conv, 65535 ; CHECK-NOT: r0 &= 65535 ret i32 %conv1 } ; Function Attrs: nounwind readonly declare i64 @llvm.bpf.load.half(i8*, i64) #1