35 lines
1.0 KiB
LLVM
35 lines
1.0 KiB
LLVM
; RUN: llc -O2 -march=bpfel -mcpu=v2 -mattr=+alu32 < %s | FileCheck %s
|
|
;
|
|
; For the below test case, 'b' in 'ret == b' needs SLL/SLR.
|
|
; 'ret' in 'ret == b' does not need SLL/SLR as all 'ret' values
|
|
; are assigned through 'w<reg> = <value>' alu32 operations.
|
|
;
|
|
; extern int helper(int);
|
|
; int test(int a, int b, int c, int d) {
|
|
; int ret;
|
|
; if (a < b)
|
|
; ret = (c < d) ? -1 : 0;
|
|
; else
|
|
; ret = (c < a) ? 1 : 2;
|
|
; return helper(ret == b);
|
|
; }
|
|
|
|
define dso_local i32 @test(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr {
|
|
entry:
|
|
%cmp = icmp slt i32 %a, %b
|
|
%cmp1 = icmp slt i32 %c, %d
|
|
%cond = sext i1 %cmp1 to i32
|
|
%cmp2 = icmp slt i32 %c, %a
|
|
%cond3 = select i1 %cmp2, i32 1, i32 2
|
|
%ret.0 = select i1 %cmp, i32 %cond, i32 %cond3
|
|
%cmp4 = icmp eq i32 %ret.0, %b
|
|
%conv = zext i1 %cmp4 to i32
|
|
%call = tail call i32 @helper(i32 %conv)
|
|
ret i32 %call
|
|
}
|
|
; CHECK: r{{[0-9]+}} = w{{[0-9]+}}
|
|
; CHECK-NOT: r{{[0-9]+}} >>= 32
|
|
; CHECK: if r{{[0-9]+}} == r{{[0-9]+}} goto
|
|
|
|
declare dso_local i32 @helper(i32) local_unnamed_addr
|