1 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 define i32 @t1(i16 zeroext %x, i32 %y) nounwind {
8 ; CHECK: lshr i32 %conv
9 %conv = zext i16 %x to i32
11 %d = sdiv i32 %conv, %s
16 define i64 @t2(i64 %x, i32 %y) nounwind {
21 %2 = zext i32 %1 to i64
27 define i64 @t3(i64 %x, i32 %y) nounwind {
30 ; CHECK-NEXT: %1 = add i32 %y, 2
31 ; CHECK-NEXT: %2 = zext i32 %1 to i64
32 ; CHECK-NEXT: %3 = lshr i64 %x, %2
33 ; CHECK-NEXT: ret i64 %3
35 %2 = zext i32 %1 to i64
40 define i32 @t4(i32 %x, i32 %y) nounwind {
43 ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %y, 5
44 ; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 5, i32 %y
45 ; CHECK-NEXT: [[SHR:%.*]] = lshr i32 %x, [[SEL]]
46 ; CHECK-NEXT: ret i32 [[SHR]]
48 %2 = icmp ult i32 %1, 32
49 %3 = select i1 %2, i32 32, i32 %1
54 define i32 @t5(i1 %x, i1 %y, i32 %V) nounwind {
57 ; CHECK-NEXT: [[SEL1:%.*]] = select i1 %x, i32 5, i32 6
58 ; CHECK-NEXT: [[SEL2:%.*]] = select i1 %y, i32 [[SEL1]], i32 %V
59 ; CHECK-NEXT: [[LSHR:%.*]] = lshr i32 %V, [[SEL2]]
60 ; CHECK-NEXT: ret i32 [[LSHR]]
62 %2 = select i1 %x, i32 32, i32 64
63 %3 = select i1 %y, i32 %2, i32 %1
68 define i32 @t6(i32 %x, i32 %z) nounwind{
70 ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 0
71 ; CHECK-NOT: udiv i32 %z, %x
72 %x_is_zero = icmp eq i32 %x, 0
73 %divisor = select i1 %x_is_zero, i32 1, i32 %x
74 %y = udiv i32 %z, %divisor