| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 |
| ; RUN: opt -S < %s | FileCheck %s |
| ; RUN: opt -S -passes=instcombine < %s | FileCheck %s --check-prefix=INSTCOMBINE |
| |
| ; llvm.umax is intentionally missing the mangling suffix here, to show that |
| ; this works fine with auto-upgrade. |
| define i16 @test(i8 %x, i8 %y) { |
| ; CHECK-LABEL: define i16 @test( |
| ; CHECK-SAME: i8 [[X:%.*]], i8 [[Y:%.*]]) { |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[X]], -1 |
| ; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) |
| ; CHECK-NEXT: [[MAX1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]]) |
| ; CHECK-NEXT: [[X_EXT:%.*]] = zext i8 [[X]] to i16 |
| ; CHECK-NEXT: [[Y_EXT:%.*]] = zext i8 [[Y]] to i16 |
| ; CHECK-NEXT: [[MAX2:%.*]] = call i16 @llvm.umax.i16(i16 [[X_EXT]], i16 [[Y_EXT]]) |
| ; CHECK-NEXT: ret i16 [[MAX2]] |
| ; |
| ; INSTCOMBINE-LABEL: define i16 @test( |
| ; INSTCOMBINE-SAME: i8 [[X:%.*]], i8 [[Y:%.*]]) { |
| ; INSTCOMBINE-NEXT: [[CMP:%.*]] = icmp sgt i8 [[X]], -1 |
| ; INSTCOMBINE-NEXT: call void @llvm.assume(i1 [[CMP]]) |
| ; INSTCOMBINE-NEXT: [[TMP1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]]) |
| ; INSTCOMBINE-NEXT: [[MAX2:%.*]] = zext i8 [[TMP1]] to i16 |
| ; INSTCOMBINE-NEXT: ret i16 [[MAX2]] |
| ; |
| %cmp = icmp sgt i8 %x, -1 |
| call void @llvm.assume(i1 %cmp) |
| %max1 = call i8 @llvm.umax(i8 %x, i8 %y) |
| %x.ext = zext i8 %x to i16 |
| %y.ext = zext i8 %y to i16 |
| %max2 = call i16 @llvm.umax.i16(i16 %x.ext, i16 %y.ext) |
| ret i16 %max2 |
| } |
