| ; NOTE: Assertions have been autogenerated by update_test_checks.py |
| ; RUN: opt -S %s -instsimplify | FileCheck %s |
| |
| ; A ==> A -> true |
| define i1 @test(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test( |
| ; CHECK: ret i1 true |
| ; |
| %var29 = icmp slt i32 %i, %length.i |
| %res = icmp uge i1 %var29, %var29 |
| ret i1 %res |
| } |
| |
| ; i +_{nsw} C_{>0} <s L ==> i <s L -> true |
| define i1 @test2(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test2( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nsw i32 %i, 1 |
| %var29 = icmp slt i32 %i, %length.i |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; i + C_{>0} <s L ==> i <s L -> unknown without the nsw |
| define i1 @test2_neg(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test2_neg( |
| ; CHECK: [[IPLUS1:%.*]] = add i32 %i, 1 |
| ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i |
| ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %iplus1 = add i32 %i, 1 |
| %var29 = icmp slt i32 %i, %length.i |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; sle is not implication |
| define i1 @test2_neg2(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test2_neg2( |
| ; CHECK: [[IPLUS1:%.*]] = add i32 %i, 1 |
| ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i |
| ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp sle i1 [[VAR30]], [[VAR29]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %iplus1 = add i32 %i, 1 |
| %var29 = icmp slt i32 %i, %length.i |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp sle i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; The binary operator has to be an add |
| define i1 @test2_neg3(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test2_neg3( |
| ; CHECK: [[IPLUS1:%.*]] = sub nsw i32 %i, 1 |
| ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i |
| ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %iplus1 = sub nsw i32 %i, 1 |
| %var29 = icmp slt i32 %i, %length.i |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; i +_{nsw} C_{>0} <s L ==> i <s L -> true |
| ; With an inverted conditional (ule B A rather than canonical ugt A B |
| define i1 @test3(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test3( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nsw i32 %i, 1 |
| %var29 = icmp slt i32 %i, %length.i |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp uge i1 %var29, %var30 |
| ret i1 %res |
| } |
| |
| ; i +_{nuw} C <u L ==> i <u L |
| define i1 @test4(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test4( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nuw i32 %i, 1 |
| %var29 = icmp ult i32 %i, %length.i |
| %var30 = icmp ult i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; A ==> A for vectors |
| define <4 x i1> @test5(<4 x i1> %vec) { |
| ; CHECK-LABEL: @test5( |
| ; CHECK: ret <4 x i1> <i1 true, i1 true, i1 true, i1 true> |
| ; |
| %res = icmp ule <4 x i1> %vec, %vec |
| ret <4 x i1> %res |
| } |
| |
| ; Don't crash on vector inputs - pr25040 |
| define <4 x i1> @test6(<4 x i1> %a, <4 x i1> %b) { |
| ; CHECK-LABEL: @test6( |
| ; CHECK: [[RES:%.*]] = icmp ule <4 x i1> %a, %b |
| ; CHECK-NEXT: ret <4 x i1> [[RES]] |
| ; |
| %res = icmp ule <4 x i1> %a, %b |
| ret <4 x i1> %res |
| } |
| |
| ; i +_{nsw} 1 <s L ==> i < L +_{nsw} 1 |
| define i1 @test7(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test7( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nsw i32 %i, 1 |
| %len.plus.one = add nsw i32 %length.i, 1 |
| %var29 = icmp slt i32 %i, %len.plus.one |
| %var30 = icmp slt i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; i +_{nuw} 1 <u L ==> i < L +_{nuw} 1 |
| define i1 @test8(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test8( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nuw i32 %i, 1 |
| %len.plus.one = add nuw i32 %length.i, 1 |
| %var29 = icmp ult i32 %i, %len.plus.one |
| %var30 = icmp ult i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| ; i +_{nuw} C <u L ==> i < L, even if C is negative |
| define i1 @test9(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test9( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nuw i32 %i, -100 |
| %var29 = icmp ult i32 %i, %length.i |
| %var30 = icmp ult i32 %iplus1, %length.i |
| %res = icmp ule i1 %var30, %var29 |
| ret i1 %res |
| } |
| |
| define i1 @test10(i32 %length.i, i32 %x.full) { |
| ; CHECK-LABEL: @test10( |
| ; CHECK: ret i1 true |
| ; |
| %x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000 |
| %large = or i32 %x, 100 |
| %small = or i32 %x, 90 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| define i1 @test11(i32 %length.i, i32 %x) { |
| ; CHECK-LABEL: @test11( |
| ; CHECK: [[LARGE:%.*]] = or i32 %x, 100 |
| ; CHECK-NEXT: [[SMALL:%.*]] = or i32 %x, 90 |
| ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i |
| ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %large = or i32 %x, 100 |
| %small = or i32 %x, 90 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| define i1 @test12(i32 %length.i, i32 %x.full) { |
| ; CHECK-LABEL: @test12( |
| ; CHECK: [[X:%.*]] = and i32 [[X:%.*]].full, -65536 |
| ; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X]], 65536 |
| ; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 90 |
| ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i |
| ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000 |
| %large = or i32 %x, 65536 ;; 65536 == 0x00010000 |
| %small = or i32 %x, 90 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| define i1 @test13(i32 %length.i, i32 %x) { |
| ; CHECK-LABEL: @test13( |
| ; CHECK: ret i1 true |
| ; |
| %large = add nuw i32 %x, 100 |
| %small = add nuw i32 %x, 90 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| define i1 @test14(i32 %length.i, i32 %x.full) { |
| ; CHECK-LABEL: @test14( |
| ; CHECK: ret i1 true |
| ; |
| %x = and i32 %x.full, 4294905615 ;; 4294905615 == 0xffff0f0f |
| %large = or i32 %x, 8224 ;; == 0x2020 |
| %small = or i32 %x, 4112 ;; == 0x1010 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| define i1 @test15(i32 %length.i, i32 %x) { |
| ; CHECK-LABEL: @test15( |
| ; CHECK: [[LARGE:%.*]] = add nuw i32 %x, 100 |
| ; CHECK-NEXT: [[SMALL:%.*]] = add nuw i32 %x, 110 |
| ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i |
| ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i |
| ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]] |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| %large = add nuw i32 %x, 100 |
| %small = add nuw i32 %x, 110 |
| %known = icmp ult i32 %large, %length.i |
| %to.prove = icmp ult i32 %small, %length.i |
| %res = icmp ule i1 %known, %to.prove |
| ret i1 %res |
| } |
| |
| ; X >=(s) Y == X ==> Y (i1 1 becomes -1 for reasoning) |
| define i1 @test_sge(i32 %length.i, i32 %i) { |
| ; CHECK-LABEL: @test_sge( |
| ; CHECK: ret i1 true |
| ; |
| %iplus1 = add nsw nuw i32 %i, 1 |
| %var29 = icmp ult i32 %i, %length.i |
| %var30 = icmp ult i32 %iplus1, %length.i |
| %res = icmp sge i1 %var30, %var29 |
| ret i1 %res |
| } |