mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
0e5fd5471e
Commit b5cbc7760ab8 ("[bpf] allow direct and indirect calls")
allowed more than one function in the bpf program, and
commit 114353884415 ("bpf: fix a bug in trunc-op optimization")
fixed a bug in trunc-op optimization which only showed up
with more than one function in the bpf program.
This patch added a test case for trunc-op optimization
for bpf programs with two functions. Reverting commit
"bpf: fix a bug in trunc-op optimization" will cause
failure for this test case.
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 318695
107 lines
2.8 KiB
LLVM
107 lines
2.8 KiB
LLVM
; RUN: llc < %s -march=bpf -verify-machineinstrs | FileCheck %s
|
|
|
|
; Source code:
|
|
; struct xdp_md {
|
|
; unsigned data;
|
|
; unsigned data_end;
|
|
; };
|
|
;
|
|
; int gbl;
|
|
; int xdp_dummy(struct xdp_md *xdp)
|
|
; {
|
|
; char tmp;
|
|
; long addr;
|
|
;
|
|
; if (gbl) {
|
|
; long addr1 = (long)xdp->data;
|
|
; tmp = *(char *)addr1;
|
|
; if (tmp == 1)
|
|
; return 3;
|
|
; } else {
|
|
; tmp = *(volatile char *)(long)xdp->data_end;
|
|
; if (tmp == 1)
|
|
; return 2;
|
|
; }
|
|
; addr = (long)xdp->data;
|
|
; tmp = *(volatile char *)addr;
|
|
; if (tmp == 0)
|
|
; return 1;
|
|
; return 0;
|
|
; }
|
|
;
|
|
; unsigned int rol32(unsigned int word, unsigned int shift)
|
|
; {
|
|
; return (word << shift) | (word >> ((-shift) & 31));
|
|
; }
|
|
%struct.xdp_md = type { i32, i32 }
|
|
|
|
@gbl = common local_unnamed_addr global i32 0, align 4
|
|
|
|
; Function Attrs: norecurse nounwind
|
|
define i32 @xdp_dummy(%struct.xdp_md* nocapture readonly) local_unnamed_addr #0 {
|
|
%2 = load i32, i32* @gbl, align 4
|
|
%3 = icmp eq i32 %2, 0
|
|
br i1 %3, label %11, label %4
|
|
|
|
; <label>:4: ; preds = %1
|
|
%5 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 0
|
|
%6 = load i32, i32* %5, align 4
|
|
%7 = zext i32 %6 to i64
|
|
%8 = inttoptr i64 %7 to i8*
|
|
%9 = load i8, i8* %8, align 1
|
|
%10 = icmp eq i8 %9, 1
|
|
br i1 %10, label %28, label %23
|
|
; CHECK: r1 = *(u32 *)(r1 + 0)
|
|
; CHECK: r2 = *(u8 *)(r1 + 0)
|
|
|
|
; <label>:11: ; preds = %1
|
|
%12 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 1
|
|
%13 = load i32, i32* %12, align 4
|
|
%14 = zext i32 %13 to i64
|
|
; CHECK: r2 = *(u32 *)(r1 + 4)
|
|
%15 = inttoptr i64 %14 to i8*
|
|
%16 = load volatile i8, i8* %15, align 1
|
|
; CHECK: r2 = *(u8 *)(r2 + 0)
|
|
%17 = icmp eq i8 %16, 1
|
|
br i1 %17, label %28, label %18
|
|
|
|
; <label>:18: ; preds = %11
|
|
%19 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 0
|
|
%20 = load i32, i32* %19, align 4
|
|
%21 = zext i32 %20 to i64
|
|
%22 = inttoptr i64 %21 to i8*
|
|
br label %23
|
|
; CHECK: r1 = *(u32 *)(r1 + 0)
|
|
|
|
; <label>:23: ; preds = %18, %4
|
|
%24 = phi i8* [ %22, %18 ], [ %8, %4 ]
|
|
; CHECK-NOT: r1 <<= 32
|
|
; CHECK-NOT: r1 >>= 32
|
|
%25 = load volatile i8, i8* %24, align 1
|
|
; CHECK: r1 = *(u8 *)(r1 + 0)
|
|
%26 = icmp eq i8 %25, 0
|
|
%27 = zext i1 %26 to i32
|
|
br label %28
|
|
|
|
; <label>:28: ; preds = %4, %23, %11
|
|
%29 = phi i32 [ 3, %4 ], [ 2, %11 ], [ %27, %23 ]
|
|
ret i32 %29
|
|
}
|
|
|
|
; Function Attrs: norecurse nounwind readnone
|
|
define i32 @rol32(i32, i32) local_unnamed_addr #1 {
|
|
%3 = shl i32 %0, %1
|
|
; CHECK: r3 <<= 32
|
|
; CHECK: r3 >>= 32
|
|
%4 = sub i32 0, %1
|
|
%5 = and i32 %4, 31
|
|
%6 = lshr i32 %0, %5
|
|
; CHECK: r1 <<= 32
|
|
; CHECK: r1 >>= 32
|
|
%7 = or i32 %6, %3
|
|
ret i32 %7
|
|
}
|
|
|
|
attributes #0 = { norecurse nounwind }
|
|
attributes #1 = { norecurse nounwind readnone }
|