1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s 3 4; We could hoist the div/rem in these tests because it's safe to do so. 5; PR31028 - https://bugs.llvm.org/show_bug.cgi?id=31028 6; ...but since there's a separate pass for that, don't bother. 7 8define i32 @hoist_sdiv(i32 %a, i32 %b) { 9; CHECK-LABEL: @hoist_sdiv( 10; CHECK-NEXT: entry: 11; CHECK-NEXT: [[REM:%.*]] = srem i32 [[A:%.*]], [[B:%.*]] 12; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42 13; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] 14; CHECK: if: 15; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[A]], [[B]] 16; CHECK-NEXT: br label [[END]] 17; CHECK: end: 18; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] 19; CHECK-NEXT: ret i32 [[RET]] 20; 21entry: 22 %rem = srem i32 %a, %b 23 %cmp = icmp eq i32 %rem, 42 24 br i1 %cmp, label %if, label %end 25 26if: 27 %div = sdiv i32 %a, %b 28 br label %end 29 30end: 31 %ret = phi i32 [ %div, %if ], [ 3, %entry ] 32 ret i32 %ret 33} 34 35define i64 @hoist_udiv(i64 %a, i64 %b) { 36; CHECK-LABEL: @hoist_udiv( 37; CHECK-NEXT: entry: 38; CHECK-NEXT: [[REM:%.*]] = urem i64 [[A:%.*]], [[B:%.*]] 39; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[REM]], 42 40; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] 41; CHECK: if: 42; CHECK-NEXT: [[DIV:%.*]] = udiv i64 [[A]], [[B]] 43; CHECK-NEXT: br label [[END]] 44; CHECK: end: 45; CHECK-NEXT: [[RET:%.*]] = phi i64 [ [[DIV]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] 46; CHECK-NEXT: ret i64 [[RET]] 47; 48entry: 49 %rem = urem i64 %a, %b 50 %cmp = icmp eq i64 %rem, 42 51 br i1 %cmp, label %if, label %end 52 53if: 54 %div = udiv i64 %a, %b 55 br label %end 56 57end: 58 %ret = phi i64 [ %div, %if ], [ 3, %entry ] 59 ret i64 %ret 60} 61 62define i16 @hoist_srem(i16 %a, i16 %b) { 63; CHECK-LABEL: @hoist_srem( 64; CHECK-NEXT: entry: 65; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 [[A:%.*]], [[B:%.*]] 66; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[DIV]], 42 67; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] 68; CHECK: if: 69; CHECK-NEXT: [[REM:%.*]] = srem i16 [[A]], [[B]] 70; CHECK-NEXT: br label [[END]] 71; CHECK: end: 72; CHECK-NEXT: [[RET:%.*]] = phi i16 [ [[REM]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] 73; CHECK-NEXT: ret i16 [[RET]] 74; 75entry: 76 %div = sdiv i16 %a, %b 77 %cmp = icmp eq i16 %div, 42 78 br i1 %cmp, label %if, label %end 79 80if: 81 %rem = srem i16 %a, %b 82 br label %end 83 84end: 85 %ret = phi i16 [ %rem, %if ], [ 3, %entry ] 86 ret i16 %ret 87} 88 89define i8 @hoist_urem(i8 %a, i8 %b) { 90; CHECK-LABEL: @hoist_urem( 91; CHECK-NEXT: entry: 92; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[A:%.*]], [[B:%.*]] 93; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[DIV]], 42 94; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[END:%.*]] 95; CHECK: if: 96; CHECK-NEXT: [[REM:%.*]] = urem i8 [[A]], [[B]] 97; CHECK-NEXT: br label [[END]] 98; CHECK: end: 99; CHECK-NEXT: [[RET:%.*]] = phi i8 [ [[REM]], [[IF]] ], [ 3, [[ENTRY:%.*]] ] 100; CHECK-NEXT: ret i8 [[RET]] 101; 102entry: 103 %div = udiv i8 %a, %b 104 %cmp = icmp eq i8 %div, 42 105 br i1 %cmp, label %if, label %end 106 107if: 108 %rem = urem i8 %a, %b 109 br label %end 110 111end: 112 %ret = phi i8 [ %rem, %if ], [ 3, %entry ] 113 ret i8 %ret 114} 115 116