1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 define i32 @t1(i16 zeroext %x, i32 %y) nounwind {
7 ; CHECK: lshr i32 %conv
8 %conv = zext i16 %x to i32
10 %d = sdiv i32 %conv, %s
15 define i64 @t2(i64 %x, i32 %y) nounwind {
20 %2 = zext i32 %1 to i64
26 define i64 @t3(i64 %x, i32 %y) nounwind {
29 ; CHECK-NEXT: %1 = add i32 %y, 2
30 ; CHECK-NEXT: %2 = zext i32 %1 to i64
31 ; CHECK-NEXT: %3 = lshr i64 %x, %2
32 ; CHECK-NEXT: ret i64 %3
34 %2 = zext i32 %1 to i64
39 define i32 @t4(i32 %x, i32 %y) nounwind {
42 ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %y, 5
43 ; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 5, i32 %y
44 ; CHECK-NEXT: [[SHR:%.*]] = lshr i32 %x, [[SEL]]
45 ; CHECK-NEXT: ret i32 [[SHR]]
47 %2 = icmp ult i32 %1, 32
48 %3 = select i1 %2, i32 32, i32 %1
53 define i32 @t5(i1 %x, i1 %y, i32 %V) nounwind {
56 ; CHECK-NEXT: [[SEL1:%.*]] = select i1 %x, i32 5, i32 6
57 ; CHECK-NEXT: [[LSHR:%.*]] = lshr i32 %V, [[SEL1]]
58 ; CHECK-NEXT: [[SEL2:%.*]] = select i1 %y, i32 [[LSHR]], i32 0
59 ; CHECK-NEXT: ret i32 [[SEL2]]
61 %2 = select i1 %x, i32 32, i32 64
62 %3 = select i1 %y, i32 %2, i32 %1
67 define i32 @t6(i32 %x, i32 %z) nounwind{
69 ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 0
70 ; CHECK-NOT: udiv i32 %z, %x
71 %x_is_zero = icmp eq i32 %x, 0
72 %divisor = select i1 %x_is_zero, i32 1, i32 %x
73 %y = udiv i32 %z, %divisor