| ; 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"} |