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| ; RUN: opt -S -instcombine < %s | FileCheck %s
|
| ; CHECK-LABEL: @t1
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: sext
| define i64 @t1(i32 %a) {
| ; This is the canonical form for a type-changing min/max.
| %1 = icmp slt i32 %a, 5
| %2 = select i1 %1, i32 %a, i32 5
| %3 = sext i32 %2 to i64
| ret i64 %3
| }
|
| ; CHECK-LABEL: @t2
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: sext
| define i64 @t2(i32 %a) {
| ; Check this is converted into canonical form, as above.
| %1 = icmp slt i32 %a, 5
| %2 = sext i32 %a to i64
| %3 = select i1 %1, i64 %2, i64 5
| ret i64 %3
| }
|
| ; CHECK-LABEL: @t3
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: zext
| define i64 @t3(i32 %a) {
| ; Same as @t2, with flipped operands and zext instead of sext.
| %1 = icmp ult i32 %a, 5
| %2 = zext i32 %a to i64
| %3 = select i1 %1, i64 5, i64 %2
| ret i64 %3
| }
|
| ; CHECK-LABEL: @t4
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: trunc
| define i32 @t4(i64 %a) {
| ; Same again, with trunc.
| %1 = icmp slt i64 %a, 5
| %2 = trunc i64 %a to i32
| %3 = select i1 %1, i32 %2, i32 5
| ret i32 %3
| }
|
| ; CHECK-LABEL: @t5
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: zext
| ; CHECK-NEXT: select
| define i64 @t5(i32 %a) {
| ; Same as @t3, but with mismatched signedness between icmp and zext.
| ; InstCombine should leave this alone.
| %1 = icmp slt i32 %a, 5
| %2 = zext i32 %a to i64
| %3 = select i1 %1, i64 5, i64 %2
| ret i64 %3
| }
|
| ; CHECK-LABEL: @t6
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: sitofp
| define float @t6(i32 %a) {
| %1 = icmp slt i32 %a, 0
| %2 = select i1 %1, i32 %a, i32 0
| %3 = sitofp i32 %2 to float
| ret float %3
| }
|
| ; CHECK-LABEL: @t7
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: select
| ; CHECK-NEXT: trunc
| define i16 @t7(i32 %a) {
| %1 = icmp slt i32 %a, -32768
| %2 = trunc i32 %a to i16
| %3 = select i1 %1, i16 %2, i16 -32768
| ret i16 %3
| }
|
| ; Just check for no infinite loop. InstSimplify liked to
| ; "simplify" -32767 by removing all the sign bits,
| ; which led to a canonicalization fight between different
| ; parts of instcombine.
| define i32 @t8(i64 %a, i32 %b) {
| %1 = icmp slt i64 %a, -32767
| %2 = select i1 %1, i64 %a, i64 -32767
| %3 = trunc i64 %2 to i32
| %4 = icmp slt i32 %b, 42
| %5 = select i1 %4, i32 42, i32 %3
| %6 = icmp ne i32 %5, %b
| %7 = zext i1 %6 to i32
| ret i32 %7
| }
|
| ; Ensure this doesn't get converted to a min/max.
| ; CHECK-LABEL: @t9
| ; CHECK-NEXT: icmp
| ; CHECK-NEXT: sext
| ; CHECK-NEXT: 4294967295
| ; CHECK-NEXT: ret
| define i64 @t9(i32 %a) {
| %1 = icmp sgt i32 %a, -1
| %2 = sext i32 %a to i64
| %3 = select i1 %1, i64 %2, i64 4294967295
| ret i64 %3
| }
|
|
