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[SimplifyCFG] Add tests for hoisting of commutative instructions (NFC)
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‎llvm/test/Transforms/SimplifyCFG/hoist-common-code.ll‎

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@@ -154,3 +154,350 @@ exit: ; preds = %bb2, %bb1, %bb0
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%result = phi i1 [ %0, %bb0 ], [ %1, %bb1 ], [ %2, %bb2 ]
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ret i1 %result
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}
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declare void @foo()
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define i1 @test_icmp_simple(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_icmp_simple(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i1 [ [[CMP1:%.*]], [[IF]] ], [ [[CMP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i1 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP1]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[CMP2]] = icmp ugt i32 [[B]], [[A]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%cmp1 = icmp ult i32 %a, %b
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call void @foo()
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ret i1 %cmp1
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else:
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%cmp2 = icmp ugt i32 %b, %a
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call void @bar()
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ret i1 %cmp2
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}
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define void @test_icmp_complex(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_icmp_complex(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[IF2:%.*]], label [[ELSE2:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[B]], [[A]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[IF2]], label [[ELSE2]]
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; CHECK: common.ret:
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; CHECK-NEXT: ret void
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; CHECK: if2:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else2:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%cmp1 = icmp ult i32 %a, %b
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br i1 %cmp1, label %if2, label %else2
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else:
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%cmp2 = icmp ugt i32 %b, %a
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br i1 %cmp2, label %if2, label %else2
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if2:
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call void @foo()
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ret void
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else2:
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call void @bar()
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ret void
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}
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define i1 @test_icmp_wrong_operands(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_icmp_wrong_operands(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i1 [ [[CMP1:%.*]], [[IF]] ], [ [[CMP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i1 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP1]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[CMP2]] = icmp ugt i32 [[A]], [[B]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%cmp1 = icmp ult i32 %a, %b
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call void @foo()
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ret i1 %cmp1
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else:
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%cmp2 = icmp ugt i32 %a, %b
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call void @bar()
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ret i1 %cmp2
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}
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define i1 @test_icmp_wrong_pred(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_icmp_wrong_pred(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i1 [ [[CMP1:%.*]], [[IF]] ], [ [[CMP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i1 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP1]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[CMP2]] = icmp uge i32 [[B]], [[A]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%cmp1 = icmp ult i32 %a, %b
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call void @foo()
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ret i1 %cmp1
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else:
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%cmp2 = icmp uge i32 %b, %a
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call void @bar()
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ret i1 %cmp2
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}
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define i32 @test_binop(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_binop(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = add i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = add i32 [[B]], [[A]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = add i32 %a, %b
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call void @foo()
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ret i32 %op1
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else:
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%op2 = add i32 %b, %a
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call void @bar()
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ret i32 %op2
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}
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define i32 @test_binop_flags(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_binop_flags(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = add nuw nsw i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = add nsw i32 [[B]], [[A]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = add nuw nsw i32 %a, %b
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call void @foo()
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ret i32 %op1
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else:
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%op2 = add nsw i32 %b, %a
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call void @bar()
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ret i32 %op2
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}
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define i32 @test_binop_not_commutative(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_binop_not_commutative(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = sub i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = sub i32 [[B]], [[A]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = sub i32 %a, %b
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call void @foo()
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ret i32 %op1
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else:
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%op2 = sub i32 %b, %a
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call void @bar()
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ret i32 %op2
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}
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define i32 @test_binop_wrong_ops(i1 %c, i32 %a, i32 %b, i32 %d) {
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; CHECK-LABEL: @test_binop_wrong_ops(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = add i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = add i32 [[B]], [[D:%.*]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = add i32 %a, %b
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call void @foo()
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ret i32 %op1
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else:
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%op2 = add i32 %b, %d
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call void @bar()
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ret i32 %op2
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}
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define i32 @test_intrin(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_intrin(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = call i32 @llvm.umin.i32(i32 [[A:%.*]], i32 [[B:%.*]])
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = call i32 @llvm.umin.i32(i32 [[B]], i32 [[A]])
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = call i32 @llvm.umin(i32 %a, i32 %b)
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call void @foo()
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ret i32 %op1
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else:
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%op2 = call i32 @llvm.umin(i32 %b, i32 %a)
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call void @bar()
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ret i32 %op2
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}
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define i32 @test_intrin_not_same(i1 %c, i32 %a, i32 %b) {
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; CHECK-LABEL: @test_intrin_not_same(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = call i32 @llvm.umin.i32(i32 [[A:%.*]], i32 [[B:%.*]])
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = call i32 @llvm.umax.i32(i32 [[B]], i32 [[A]])
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = call i32 @llvm.umin(i32 %a, i32 %b)
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call void @foo()
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ret i32 %op1
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else:
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%op2 = call i32 @llvm.umax(i32 %b, i32 %a)
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call void @bar()
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ret i32 %op2
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}
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define float @test_intrin_3arg(i1 %c, float %a, float %b, float %d) {
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; CHECK-LABEL: @test_intrin_3arg(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi float [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret float [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = call float @llvm.fma.f32(float [[A:%.*]], float [[B:%.*]], float [[D:%.*]])
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = call float @llvm.fma.f32(float [[B]], float [[A]], float [[D]])
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = call float @llvm.fma(float %a, float %b, float %d)
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call void @foo()
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ret float %op1
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else:
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%op2 = call float @llvm.fma(float %b, float %a, float %d)
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call void @bar()
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ret float %op2
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}
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define float @test_intrin_3arg_wrong_args_commuted(i1 %c, float %a, float %b, float %d) {
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; CHECK-LABEL: @test_intrin_3arg_wrong_args_commuted(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi float [ [[OP1:%.*]], [[IF]] ], [ [[OP2:%.*]], [[ELSE]] ]
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; CHECK-NEXT: ret float [[COMMON_RET_OP]]
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; CHECK: if:
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; CHECK-NEXT: [[OP1]] = call float @llvm.fma.f32(float [[A:%.*]], float [[B:%.*]], float [[D:%.*]])
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[COMMON_RET:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[OP2]] = call float @llvm.fma.f32(float [[A]], float [[D]], float [[B]])
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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br i1 %c, label %if, label %else
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if:
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%op1 = call float @llvm.fma(float %a, float %b, float %d)
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call void @foo()
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ret float %op1
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else:
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%op2 = call float @llvm.fma(float %a, float %d, float %b)
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call void @bar()
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ret float %op2
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}

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