| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| ; Fold |
| ; ((%x * %y) u/ %x) != %y |
| ; to |
| ; @llvm.umul.with.overflow(%x, %y) + extractvalue |
| |
| define i1 @t0_basic(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @t0_basic( |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1 |
| ; CHECK-NEXT: ret i1 [[UMUL_OV]] |
| ; |
| %t0 = mul i8 %x, %y |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) { |
| ; CHECK-LABEL: @t1_vec( |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { <2 x i8>, <2 x i1> } @llvm.umul.with.overflow.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]]) |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { <2 x i8>, <2 x i1> } [[UMUL]], 1 |
| ; CHECK-NEXT: ret <2 x i1> [[UMUL_OV]] |
| ; |
| %t0 = mul <2 x i8> %x, %y |
| %t1 = udiv <2 x i8> %t0, %x |
| %r = icmp ne <2 x i8> %t1, %y |
| ret <2 x i1> %r |
| } |
| |
| declare i8 @gen8() |
| |
| define i1 @t2_commutative(i8 %x) { |
| ; CHECK-LABEL: @t2_commutative( |
| ; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8() |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]]) |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1 |
| ; CHECK-NEXT: ret i1 [[UMUL_OV]] |
| ; |
| %y = call i8 @gen8() |
| %t0 = mul i8 %y, %x ; swapped |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define i1 @t3_commutative(i8 %x) { |
| ; CHECK-LABEL: @t3_commutative( |
| ; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8() |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]]) |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1 |
| ; CHECK-NEXT: ret i1 [[UMUL_OV]] |
| ; |
| %y = call i8 @gen8() |
| %t0 = mul i8 %y, %x ; swapped |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define i1 @t4_commutative(i8 %x) { |
| ; CHECK-LABEL: @t4_commutative( |
| ; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8() |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]]) |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1 |
| ; CHECK-NEXT: ret i1 [[UMUL_OV]] |
| ; |
| %y = call i8 @gen8() |
| %t0 = mul i8 %y, %x ; swapped |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %y, %t1 ; swapped |
| ret i1 %r |
| } |
| |
| ; Extra-use tests |
| |
| declare void @use8(i8) |
| |
| define i1 @t5_extrause0(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @t5_extrause0( |
| ; CHECK-NEXT: [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) |
| ; CHECK-NEXT: [[UMUL_VAL:%.*]] = extractvalue { i8, i1 } [[UMUL]], 0 |
| ; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1 |
| ; CHECK-NEXT: call void @use8(i8 [[UMUL_VAL]]) |
| ; CHECK-NEXT: ret i1 [[UMUL_OV]] |
| ; |
| %t0 = mul i8 %x, %y |
| call void @use8(i8 %t0) |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define i1 @t6_extrause1(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @t6_extrause1( |
| ; CHECK-NEXT: [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[T1:%.*]] = udiv i8 [[T0]], [[X]] |
| ; CHECK-NEXT: call void @use8(i8 [[T1]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[T1]], [[Y]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %t0 = mul i8 %x, %y |
| %t1 = udiv i8 %t0, %x |
| call void @use8(i8 %t1) |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define i1 @t7_extrause2(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @t7_extrause2( |
| ; CHECK-NEXT: [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[T0]]) |
| ; CHECK-NEXT: [[T1:%.*]] = udiv i8 [[T0]], [[X]] |
| ; CHECK-NEXT: call void @use8(i8 [[T1]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[T1]], [[Y]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %t0 = mul i8 %x, %y |
| call void @use8(i8 %t0) |
| %t1 = udiv i8 %t0, %x |
| call void @use8(i8 %t1) |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| ; Negative tests |
| |
| define i1 @n8_different_x(i8 %x0, i8 %x1, i8 %y) { |
| ; CHECK-LABEL: @n8_different_x( |
| ; CHECK-NEXT: [[T0:%.*]] = mul i8 [[X0:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[T1:%.*]] = udiv i8 [[T0]], [[X1:%.*]] |
| ; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[T1]], [[Y]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %t0 = mul i8 %x0, %y |
| %t1 = udiv i8 %t0, %x1 |
| %r = icmp ne i8 %t1, %y |
| ret i1 %r |
| } |
| |
| define i1 @n9_different_y(i8 %x, i8 %y0, i8 %y1) { |
| ; CHECK-LABEL: @n9_different_y( |
| ; CHECK-NEXT: [[T0:%.*]] = mul i8 [[X:%.*]], [[Y0:%.*]] |
| ; CHECK-NEXT: [[T1:%.*]] = udiv i8 [[T0]], [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[T1]], [[Y1:%.*]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %t0 = mul i8 %x, %y0 |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ne i8 %t1, %y1 |
| ret i1 %r |
| } |
| |
| define i1 @n10_wrong_pred(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @n10_wrong_pred( |
| ; CHECK-NEXT: [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[T1:%.*]] = udiv i8 [[T0]], [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[T1]], [[Y]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %t0 = mul i8 %x, %y |
| %t1 = udiv i8 %t0, %x |
| %r = icmp ugt i8 %t1, %y |
| ret i1 %r |
| } |