| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| target datalayout = "n64" |
| |
| ; Tests for removing zext/trunc from/to i8, i16 and i32, even if it is |
| ; not a legal type. |
| |
| define i8 @test1(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: [[C:%.*]] = add i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i8 [[C]] |
| ; |
| %xz = zext i8 %x to i64 |
| %yz = zext i8 %y to i64 |
| %c = add i64 %xz, %yz |
| %d = trunc i64 %c to i8 |
| ret i8 %d |
| } |
| |
| define i16 @test2(i16 %x, i16 %y) { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: [[C:%.*]] = add i16 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i16 [[C]] |
| ; |
| %xz = zext i16 %x to i64 |
| %yz = zext i16 %y to i64 |
| %c = add i64 %xz, %yz |
| %d = trunc i64 %c to i16 |
| ret i16 %d |
| } |
| |
| define i32 @test3(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: [[C:%.*]] = add i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[C]] |
| ; |
| %xz = zext i32 %x to i64 |
| %yz = zext i32 %y to i64 |
| %c = add i64 %xz, %yz |
| %d = trunc i64 %c to i32 |
| ret i32 %d |
| } |
| |
| define i9 @test4(i9 %x, i9 %y) { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: [[XZ:%.*]] = zext i9 [[X:%.*]] to i64 |
| ; CHECK-NEXT: [[YZ:%.*]] = zext i9 [[Y:%.*]] to i64 |
| ; CHECK-NEXT: [[C:%.*]] = add nuw nsw i64 [[XZ]], [[YZ]] |
| ; CHECK-NEXT: [[D:%.*]] = trunc i64 [[C]] to i9 |
| ; CHECK-NEXT: ret i9 [[D]] |
| ; |
| %xz = zext i9 %x to i64 |
| %yz = zext i9 %y to i64 |
| %c = add i64 %xz, %yz |
| %d = trunc i64 %c to i9 |
| ret i9 %d |
| } |