bpf: add " ll" in the LD_IMM64 asmstring
This partially revert previous fix in commit f5858045aa0b
("bpf: proper print imm64 expression in inst printer").
In that commit, the original suffix "ll" is removed from
LD_IMM64 asmstring. In the customer print method, the "ll"
suffix is printed if the rhs is an immediate. For example,
"r2 = 5ll" => "r2 = 5ll", and "r3 = varll" => "r3 = var".
This has an issue though for assembler. Since assembler
relies on asmstring to do pattern matching, it will not
be able to distiguish between "mov r2, 5" and
"ld_imm64 r2, 5" since both asmstring is "r2 = 5".
In such cases, the assembler uses 64bit load for all
"r = <val>" asm insts.
This patch adds back " ll" suffix for ld_imm64 with one
additional space for "#reg = #global_var" case.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 312978
diff --git a/llvm/test/CodeGen/BPF/cc_ret.ll b/llvm/test/CodeGen/BPF/cc_ret.ll
index eab2a35..be198f5 100644
--- a/llvm/test/CodeGen/BPF/cc_ret.ll
+++ b/llvm/test/CodeGen/BPF/cc_ret.ll
@@ -42,7 +42,7 @@
define i64 @f_i64() #0 {
; CHECK: f_i64:
-; CHECK: r0 = 72623859790382856ll
+; CHECK: r0 = 72623859790382856 ll
; CHECK: exit
ret i64 72623859790382856
}