1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature 2; RUN: opt -S -O3 -o - %s | FileCheck %s 3 4; PR44154: LLVM c3b06d0c393e caused the body of @main to be replaced with 5; unreachable. Check that we perform the expected calls and optimizations. 6 7target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 8target triple = "x86_64-unknown-linux-gnu" 9 10define i32 @main(i32 %argc, ptr %argv) #0 { 11; CHECK-LABEL: define {{[^@]+}}@main 12; CHECK-SAME: (i32 [[ARGC:%.*]], ptr readonly captures(none) [[ARGV:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] { 13; CHECK-NEXT: entry: 14; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[ARGC]], 2 15; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TMP0]], i32 0, i32 [[ARGC]] 16; CHECK-NEXT: ret i32 [[SPEC_SELECT]] 17; 18entry: 19 %ptr = load ptr, ptr %argv 20 %0 = call i32 @compute(ptr %ptr, i32 %argc) 21 %1 = icmp slt i32 %argc, 2 22 br i1 %1, label %done, label %do_work 23 24do_work: 25 %2 = icmp eq ptr %ptr, null 26 br i1 %2, label %null, label %done 27 28null: 29 call void @call_if_null(ptr %ptr) 30 br label %done 31 32done: 33 %retval = phi i32 [0, %entry], [%0, %do_work], [%0, %null] 34 ret i32 %retval 35} 36 37define i32 @compute(ptr noundef nonnull %ptr, i32 %x) #1 { 38; CHECK-LABEL: define {{[^@]+}}@compute 39; CHECK-SAME: (ptr noundef nonnull readnone captures(none) [[PTR:%.*]], i32 returned [[X:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] { 40; CHECK-NEXT: ret i32 [[X]] 41; 42 ret i32 %x 43} 44 45declare void @call_if_null(ptr %ptr) #0 46 47attributes #0 = { nounwind } 48attributes #1 = { noinline nounwind readonly } 49