| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| define void @idom_sign_bit_check_edge_dominates(i64 %a) { |
| ; CHECK-LABEL: @idom_sign_bit_check_edge_dominates( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[LAND_LHS_TRUE:%.*]], label [[LOR_RHS:%.*]] |
| ; CHECK: land.lhs.true: |
| ; CHECK-NEXT: br label [[LOR_END:%.*]] |
| ; CHECK: lor.rhs: |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i64 [[A]], 0 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[LOR_END]], label [[LAND_RHS:%.*]] |
| ; CHECK: land.rhs: |
| ; CHECK-NEXT: br label [[LOR_END]] |
| ; CHECK: lor.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp slt i64 %a, 0 |
| br i1 %cmp, label %land.lhs.true, label %lor.rhs |
| |
| land.lhs.true: |
| br label %lor.end |
| |
| lor.rhs: |
| %cmp2 = icmp sgt i64 %a, 0 |
| br i1 %cmp2, label %land.rhs, label %lor.end |
| |
| land.rhs: |
| br label %lor.end |
| |
| lor.end: |
| ret void |
| } |
| |
| define void @idom_sign_bit_check_edge_not_dominates(i64 %a) { |
| ; CHECK-LABEL: @idom_sign_bit_check_edge_not_dominates( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[LAND_LHS_TRUE:%.*]], label [[LOR_RHS:%.*]] |
| ; CHECK: land.lhs.true: |
| ; CHECK-NEXT: br i1 undef, label [[LOR_END:%.*]], label [[LOR_RHS]] |
| ; CHECK: lor.rhs: |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i64 [[A]], 0 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[LAND_RHS:%.*]], label [[LOR_END]] |
| ; CHECK: land.rhs: |
| ; CHECK-NEXT: br label [[LOR_END]] |
| ; CHECK: lor.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp slt i64 %a, 0 |
| br i1 %cmp, label %land.lhs.true, label %lor.rhs |
| |
| land.lhs.true: |
| br i1 undef, label %lor.end, label %lor.rhs |
| |
| lor.rhs: |
| %cmp2 = icmp sgt i64 %a, 0 |
| br i1 %cmp2, label %land.rhs, label %lor.end |
| |
| land.rhs: |
| br label %lor.end |
| |
| lor.end: |
| ret void |
| } |
| |
| ; TODO: cmp3 could be reduced to A != B, but we miss that |
| ; while avoiding an infinite loop with min/max canonicalization. |
| |
| define void @idom_sign_bit_check_edge_dominates_select(i64 %a, i64 %b) { |
| ; CHECK-LABEL: @idom_sign_bit_check_edge_dominates_select( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[A:%.*]], 5 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[LAND_LHS_TRUE:%.*]], label [[LOR_RHS:%.*]] |
| ; CHECK: land.lhs.true: |
| ; CHECK-NEXT: br label [[LOR_END:%.*]] |
| ; CHECK: lor.rhs: |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i64 [[A]], 5 |
| ; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP2]], i64 [[A]], i64 5 |
| ; CHECK-NEXT: [[CMP3_NOT:%.*]] = icmp eq i64 [[SELECT]], [[B:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP3_NOT]], label [[LOR_END]], label [[LAND_RHS:%.*]] |
| ; CHECK: land.rhs: |
| ; CHECK-NEXT: br label [[LOR_END]] |
| ; CHECK: lor.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp slt i64 %a, 5 |
| br i1 %cmp, label %land.lhs.true, label %lor.rhs |
| |
| land.lhs.true: |
| br label %lor.end |
| |
| lor.rhs: |
| %cmp2 = icmp sgt i64 %a, 5 |
| %select = select i1 %cmp2, i64 %a, i64 5 |
| %cmp3 = icmp ne i64 %select, %b |
| br i1 %cmp3, label %land.rhs, label %lor.end |
| |
| land.rhs: |
| br label %lor.end |
| |
| lor.end: |
| ret void |
| } |
| |
| define void @idom_zbranch(i64 %a) { |
| ; CHECK-LABEL: @idom_zbranch( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[LOR_END:%.*]], label [[LOR_RHS:%.*]] |
| ; CHECK: lor.rhs: |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i64 [[A]], 0 |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[LAND_RHS:%.*]], label [[LOR_END]] |
| ; CHECK: land.rhs: |
| ; CHECK-NEXT: br label [[LOR_END]] |
| ; CHECK: lor.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp sgt i64 %a, 0 |
| br i1 %cmp, label %lor.end, label %lor.rhs |
| |
| lor.rhs: |
| %cmp2 = icmp slt i64 %a, 0 |
| br i1 %cmp2, label %land.rhs, label %lor.end |
| |
| land.rhs: |
| br label %lor.end |
| |
| lor.end: |
| ret void |
| } |
| |
| ; TODO: cmp2 could be reduced to A != B, but we miss that |
| ; while avoiding an infinite loop with min/max canonicalization. |
| |
| define void @idom_not_zbranch(i32 %a, i32 %b) { |
| ; CHECK-LABEL: @idom_not_zbranch( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[IF_END:%.*]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[A]], 0 |
| ; CHECK-NEXT: [[A_:%.*]] = select i1 [[CMP1]], i32 [[A]], i32 0 |
| ; CHECK-NEXT: [[CMP2_NOT:%.*]] = icmp eq i32 [[A_]], [[B:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP2_NOT]], label [[RETURN]], label [[IF_THEN3:%.*]] |
| ; CHECK: if.then3: |
| ; CHECK-NEXT: br label [[RETURN]] |
| ; CHECK: return: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp sgt i32 %a, 0 |
| br i1 %cmp, label %return, label %if.end |
| |
| if.end: |
| %cmp1 = icmp slt i32 %a, 0 |
| %a. = select i1 %cmp1, i32 %a, i32 0 |
| %cmp2 = icmp ne i32 %a., %b |
| br i1 %cmp2, label %if.then3, label %return |
| |
| if.then3: |
| br label %return |
| |
| return: |
| ret void |
| } |
| |
| define void @trueblock_cmp_eq(i32 %a, i32 %b) { |
| ; CHECK-LABEL: @trueblock_cmp_eq( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[RETURN:%.*]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A]], 1 |
| ; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN3:%.*]], label [[RETURN]] |
| ; CHECK: if.then3: |
| ; CHECK-NEXT: br label [[RETURN]] |
| ; CHECK: return: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %cmp = icmp sgt i32 %a, 0 |
| br i1 %cmp, label %if.end, label %return |
| |
| if.end: |
| %cmp1 = icmp slt i32 %a, 2 |
| br i1 %cmp1, label %if.then3, label %return |
| |
| if.then3: |
| br label %return |
| |
| return: |
| ret void |
| } |
| |
| define i1 @trueblock_cmp_is_false(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @trueblock_cmp_is_false( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 false |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| entry: |
| %cmp = icmp sgt i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| %cmp2 = icmp slt i32 %x, %y |
| ret i1 %cmp2 |
| f: |
| ret i1 %cmp |
| } |
| |
| define i1 @trueblock_cmp_is_false_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @trueblock_cmp_is_false_commute( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 false |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| entry: |
| %cmp = icmp eq i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| %cmp2 = icmp sgt i32 %y, %x |
| ret i1 %cmp2 |
| f: |
| ret i1 %cmp |
| } |
| |
| define i1 @trueblock_cmp_is_true(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @trueblock_cmp_is_true( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 true |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| entry: |
| %cmp = icmp ult i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| %cmp2 = icmp ne i32 %x, %y |
| ret i1 %cmp2 |
| f: |
| ret i1 %cmp |
| } |
| |
| define i1 @trueblock_cmp_is_true_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @trueblock_cmp_is_true_commute( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 true |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| entry: |
| %cmp = icmp ugt i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| %cmp2 = icmp ne i32 %y, %x |
| ret i1 %cmp2 |
| f: |
| ret i1 %cmp |
| } |
| |
| define i1 @falseblock_cmp_is_false(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @falseblock_cmp_is_false( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 false |
| ; |
| entry: |
| %cmp = icmp sle i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| ret i1 %cmp |
| f: |
| %cmp2 = icmp slt i32 %x, %y |
| ret i1 %cmp2 |
| } |
| |
| define i1 @falseblock_cmp_is_false_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @falseblock_cmp_is_false_commute( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 false |
| ; |
| entry: |
| %cmp = icmp eq i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| ret i1 %cmp |
| f: |
| %cmp2 = icmp eq i32 %y, %x |
| ret i1 %cmp2 |
| } |
| |
| define i1 @falseblock_cmp_is_true(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @falseblock_cmp_is_true( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 true |
| ; |
| entry: |
| %cmp = icmp ult i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| ret i1 %cmp |
| f: |
| %cmp2 = icmp uge i32 %x, %y |
| ret i1 %cmp2 |
| } |
| |
| define i1 @falseblock_cmp_is_true_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @falseblock_cmp_is_true_commute( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[T:%.*]], label [[F:%.*]] |
| ; CHECK: t: |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; CHECK: f: |
| ; CHECK-NEXT: ret i1 true |
| ; |
| entry: |
| %cmp = icmp sgt i32 %x, %y |
| br i1 %cmp, label %t, label %f |
| t: |
| ret i1 %cmp |
| f: |
| %cmp2 = icmp sge i32 %y, %x |
| ret i1 %cmp2 |
| } |
| |
| ; This used to infinite loop because of a conflict |
| ; with min/max canonicalization. |
| |
| define i32 @PR48900(i32 %i, i1* %p) { |
| ; CHECK-LABEL: @PR48900( |
| ; CHECK-NEXT: [[MAXCMP:%.*]] = icmp ugt i32 [[I:%.*]], 1 |
| ; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[MAXCMP]], i32 [[I]], i32 1 |
| ; CHECK-NEXT: [[I4:%.*]] = icmp sgt i32 [[UMAX]], 0 |
| ; CHECK-NEXT: br i1 [[I4]], label [[TRUELABEL:%.*]], label [[FALSELABEL:%.*]] |
| ; CHECK: truelabel: |
| ; CHECK-NEXT: [[MINCMP:%.*]] = icmp ult i32 [[UMAX]], 2 |
| ; CHECK-NEXT: [[SMIN:%.*]] = select i1 [[MINCMP]], i32 [[UMAX]], i32 2 |
| ; CHECK-NEXT: ret i32 [[SMIN]] |
| ; CHECK: falselabel: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %maxcmp = icmp ugt i32 %i, 1 |
| %umax = select i1 %maxcmp, i32 %i, i32 1 |
| %i4 = icmp sgt i32 %umax, 0 |
| br i1 %i4, label %truelabel, label %falselabel |
| |
| truelabel: |
| %mincmp = icmp ult i32 %umax, 2 |
| %smin = select i1 %mincmp, i32 %umax, i32 2 |
| ret i32 %smin |
| |
| falselabel: |
| ret i32 0 |
| } |
| |
| ; This used to infinite loop because of a conflict |
| ; with min/max canonicalization. |
| |
| define i8 @PR48900_alt(i8 %i, i1* %p) { |
| ; CHECK-LABEL: @PR48900_alt( |
| ; CHECK-NEXT: [[MAXCMP:%.*]] = icmp sgt i8 [[I:%.*]], -127 |
| ; CHECK-NEXT: [[SMAX:%.*]] = select i1 [[MAXCMP]], i8 [[I]], i8 -127 |
| ; CHECK-NEXT: [[I4:%.*]] = icmp ugt i8 [[SMAX]], -128 |
| ; CHECK-NEXT: br i1 [[I4]], label [[TRUELABEL:%.*]], label [[FALSELABEL:%.*]] |
| ; CHECK: truelabel: |
| ; CHECK-NEXT: [[MINCMP:%.*]] = icmp slt i8 [[SMAX]], -126 |
| ; CHECK-NEXT: [[UMIN:%.*]] = select i1 [[MINCMP]], i8 [[SMAX]], i8 -126 |
| ; CHECK-NEXT: ret i8 [[UMIN]] |
| ; CHECK: falselabel: |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %maxcmp = icmp sgt i8 %i, -127 |
| %smax = select i1 %maxcmp, i8 %i, i8 -127 |
| %i4 = icmp ugt i8 %smax, 128 |
| br i1 %i4, label %truelabel, label %falselabel |
| |
| truelabel: |
| %mincmp = icmp slt i8 %smax, -126 |
| %umin = select i1 %mincmp, i8 %smax, i8 -126 |
| ret i8 %umin |
| |
| falselabel: |
| ret i8 0 |
| } |