| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s |
| |
| ; We could hoist the div/rem in these tests because it's safe to do so. |
| ; PR31028 - https://bugs.llvm.org/show_bug.cgi?id=31028 |
| ; ...but since there's a separate pass for that, don't bother. |
| |
| define i32 @hoist_sdiv(i32 %a, i32 %b) { |
| ; CHECK-LABEL: @hoist_sdiv( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[REM:%.*]] = srem i32 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] |
| ; CHECK: if: |
| ; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[A]], [[B]] |
| ; CHECK-NEXT: br label [[END]] |
| ; CHECK: end: |
| ; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: ret i32 [[RET]] |
| ; |
| entry: |
| %rem = srem i32 %a, %b |
| %cmp = icmp eq i32 %rem, 42 |
| br i1 %cmp, label %if, label %end |
| |
| if: |
| %div = sdiv i32 %a, %b |
| br label %end |
| |
| end: |
| %ret = phi i32 [ %div, %if ], [ 3, %entry ] |
| ret i32 %ret |
| } |
| |
| define i64 @hoist_udiv(i64 %a, i64 %b) { |
| ; CHECK-LABEL: @hoist_udiv( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[REM:%.*]] = urem i64 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[REM]], 42 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] |
| ; CHECK: if: |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i64 [[A]], [[B]] |
| ; CHECK-NEXT: br label [[END]] |
| ; CHECK: end: |
| ; CHECK-NEXT: [[RET:%.*]] = phi i64 [ [[DIV]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: ret i64 [[RET]] |
| ; |
| entry: |
| %rem = urem i64 %a, %b |
| %cmp = icmp eq i64 %rem, 42 |
| br i1 %cmp, label %if, label %end |
| |
| if: |
| %div = udiv i64 %a, %b |
| br label %end |
| |
| end: |
| %ret = phi i64 [ %div, %if ], [ 3, %entry ] |
| ret i64 %ret |
| } |
| |
| define i16 @hoist_srem(i16 %a, i16 %b) { |
| ; CHECK-LABEL: @hoist_srem( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[DIV]], 42 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] |
| ; CHECK: if: |
| ; CHECK-NEXT: [[REM:%.*]] = srem i16 [[A]], [[B]] |
| ; CHECK-NEXT: br label [[END]] |
| ; CHECK: end: |
| ; CHECK-NEXT: [[RET:%.*]] = phi i16 [ [[REM]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: ret i16 [[RET]] |
| ; |
| entry: |
| %div = sdiv i16 %a, %b |
| %cmp = icmp eq i16 %div, 42 |
| br i1 %cmp, label %if, label %end |
| |
| if: |
| %rem = srem i16 %a, %b |
| br label %end |
| |
| end: |
| %ret = phi i16 [ %rem, %if ], [ 3, %entry ] |
| ret i16 %ret |
| } |
| |
| define i8 @hoist_urem(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @hoist_urem( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[DIV]], 42 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] |
| ; CHECK: if: |
| ; CHECK-NEXT: [[REM:%.*]] = urem i8 [[A]], [[B]] |
| ; CHECK-NEXT: br label [[END]] |
| ; CHECK: end: |
| ; CHECK-NEXT: [[RET:%.*]] = phi i8 [ [[REM]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: ret i8 [[RET]] |
| ; |
| entry: |
| %div = udiv i8 %a, %b |
| %cmp = icmp eq i8 %div, 42 |
| br i1 %cmp, label %if, label %end |
| |
| if: |
| %rem = urem i8 %a, %b |
| br label %end |
| |
| end: |
| %ret = phi i8 [ %rem, %if ], [ 3, %entry ] |
| ret i8 %ret |
| } |
| |