forked from OSchip/llvm-project
86 lines
2.6 KiB
LLVM
86 lines
2.6 KiB
LLVM
; RUN: opt -O2 -S -mtriple=bpf-pc-linux %s -o %t1
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; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK,CHECK-V1 %s
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; RUN: opt -O2 -S -mtriple=bpf-pc-linux %s -o %t1
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; RUN: llc %t1 -mcpu=v3 -o - | FileCheck -check-prefixes=CHECK,CHECK-V3 %s
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;
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; Source:
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; int test1(unsigned long a) {
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; if ((unsigned)a > 3) return 2;
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; return 3;
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; }
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; int test2(unsigned long a) {
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; if ((unsigned)a >= 4) return 2;
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; return 3;
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; }
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; Compilation flag:
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; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
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; Function Attrs: nounwind
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define dso_local i32 @test1(i64 %a) #0 {
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entry:
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%retval = alloca i32, align 4
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%a.addr = alloca i64, align 8
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store i64 %a, i64* %a.addr, align 8, !tbaa !3
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%0 = load i64, i64* %a.addr, align 8, !tbaa !3
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%conv = trunc i64 %0 to i32
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%cmp = icmp ugt i32 %conv, 3
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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store i32 2, i32* %retval, align 4
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br label %return
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if.end: ; preds = %entry
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store i32 3, i32* %retval, align 4
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br label %return
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return: ; preds = %if.end, %if.then
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%1 = load i32, i32* %retval, align 4
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ret i32 %1
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}
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; CHECK-LABEL: test1
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; CHECK-V1: if r[[#]] > 3 goto
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; CHECK-V3: if w[[#]] > 3 goto
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; Function Attrs: nounwind
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define dso_local i32 @test2(i64 %a) #0 {
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entry:
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%retval = alloca i32, align 4
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%a.addr = alloca i64, align 8
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store i64 %a, i64* %a.addr, align 8, !tbaa !3
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%0 = load i64, i64* %a.addr, align 8, !tbaa !3
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%conv = trunc i64 %0 to i32
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%cmp = icmp uge i32 %conv, 4
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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store i32 2, i32* %retval, align 4
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br label %return
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if.end: ; preds = %entry
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store i32 3, i32* %retval, align 4
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br label %return
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return: ; preds = %if.end, %if.then
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%1 = load i32, i32* %retval, align 4
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ret i32 %1
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}
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; CHECK-LABEL: test2
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; CHECK-V1: if r[[#]] > 3 goto
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; CHECK-V3: if w[[#]] > 3 goto
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attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"frame-pointer", i32 2}
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!2 = !{!"clang version 14.0.0 (https://github.com/llvm/llvm-project.git 930ccf0191b4a33332d924522e5676fff583f083)"}
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!3 = !{!4, !4, i64 0}
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!4 = !{!"long", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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