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; RUN: opt -O2 -S -mtriple=bpf-pc-linux %s -o %t1
; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK,CHECK-V1 %s
; RUN: opt -O2 -S -mtriple=bpf-pc-linux %s -o %t1
; RUN: llc %t1 -mcpu=v3 -o - | FileCheck -check-prefixes=CHECK,CHECK-V3 %s
;
; Source:
; int test1(unsigned long a) {
; if ((unsigned)a > 3) return 2;
; return 3;
; }
; int test2(unsigned long a) {
; if ((unsigned)a >= 4) return 2;
; return 3;
; }
; Compilation flag:
; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
; Function Attrs: nounwind
define dso_local i32 @test1(i64 %a) #0 {
entry:
%retval = alloca i32, align 4
%a.addr = alloca i64, align 8
store i64 %a, ptr %a.addr, align 8, !tbaa !3
%0 = load i64, ptr %a.addr, align 8, !tbaa !3
%conv = trunc i64 %0 to i32
%cmp = icmp ugt i32 %conv, 3
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
store i32 2, ptr %retval, align 4
br label %return
if.end: ; preds = %entry
store i32 3, ptr %retval, align 4
br label %return
return: ; preds = %if.end, %if.then
%1 = load i32, ptr %retval, align 4
ret i32 %1
}
; CHECK-LABEL: test1
; CHECK-V1: if r[[#]] > 3 goto
; CHECK-V3: if w[[#]] > 3 goto
; Function Attrs: nounwind
define dso_local i32 @test2(i64 %a) #0 {
entry:
%retval = alloca i32, align 4
%a.addr = alloca i64, align 8
store i64 %a, ptr %a.addr, align 8, !tbaa !3
%0 = load i64, ptr %a.addr, align 8, !tbaa !3
%conv = trunc i64 %0 to i32
%cmp = icmp uge i32 %conv, 4
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
store i32 2, ptr %retval, align 4
br label %return
if.end: ; preds = %entry
store i32 3, ptr %retval, align 4
br label %return
return: ; preds = %if.end, %if.then
%1 = load i32, ptr %retval, align 4
ret i32 %1
}
; CHECK-LABEL: test2
; CHECK-V1: if r[[#]] > 3 goto
; CHECK-V3: if w[[#]] > 3 goto
attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
!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 930ccf0191b4a33332d924522e5676fff583f083)"}
!3 = !{!4, !4, i64 0}
!4 = !{!"long", !5, i64 0}
!5 = !{!"omnipotent char", !6, i64 0}
!6 = !{!"Simple C/C++ TBAA"}
|
