forked from OSchip/llvm-project
50 lines
1.5 KiB
LLVM
50 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
|
|
; RUN: opt -S -O3 -o - %s | FileCheck %s
|
|
|
|
; PR44154: LLVM c3b06d0c393e caused the body of @main to be replaced with
|
|
; unreachable. Check that we perform the expected calls and optimizations.
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
define i32 @main(i32 %argc, i8** %argv) #0 {
|
|
; CHECK-LABEL: define {{[^@]+}}@main
|
|
; CHECK-SAME: (i32 [[ARGC:%.*]], i8** nocapture readnone [[ARGV:%.*]]) local_unnamed_addr #0
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[ARGC]], 2
|
|
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TMP0]], i32 0, i32 [[ARGC]]
|
|
; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
|
|
;
|
|
entry:
|
|
%0 = getelementptr inbounds i8*, i8** %argv, i32 0
|
|
%ptr = load i8*, i8** %0
|
|
%1 = call i32 @compute(i8* %ptr, i32 %argc)
|
|
%2 = icmp slt i32 %argc, 2
|
|
br i1 %2, label %done, label %do_work
|
|
|
|
do_work:
|
|
%3 = icmp eq i8* %ptr, null
|
|
br i1 %3, label %null, label %done
|
|
|
|
null:
|
|
call void @call_if_null(i8* %ptr)
|
|
br label %done
|
|
|
|
done:
|
|
%retval = phi i32 [0, %entry], [%1, %do_work], [%1, %null]
|
|
ret i32 %retval
|
|
}
|
|
|
|
define i32 @compute(i8* nonnull %ptr, i32 %x) #1 {
|
|
; CHECK-LABEL: define {{[^@]+}}@compute
|
|
; CHECK-SAME: (i8* nocapture nonnull readnone [[PTR:%.*]], i32 returned [[X:%.*]]) local_unnamed_addr #1
|
|
; CHECK-NEXT: ret i32 [[X]]
|
|
;
|
|
ret i32 %x
|
|
}
|
|
|
|
declare void @call_if_null(i8* %ptr) #0
|
|
|
|
attributes #0 = { nounwind }
|
|
attributes #1 = { noinline nounwind readonly }
|