target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" target triple = "armv7m-none-eabi" @"runtime.lookupPanic$string" = constant [18 x i8] c"index out of range" declare void @runtime.runtimePanic(i8*, i32) declare void @runtime._panic(i32, i8*) define void @runtime.lookupPanic() { call void @llvm.trap() call void @runtime.runtimePanic(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @"runtime.lookupPanic$string", i64 0, i64 0), i32 18) ret void } define void @someFunc(i32 %typecode, i8* %value) { call void @llvm.trap() call void @runtime._panic(i32 %typecode, i8* %value) unreachable } ; Function Attrs: cold noreturn nounwind declare void @llvm.trap() #0 attributes #0 = { cold noreturn nounwind }